coolant temperature DODGE RAM 2001 Service Service Manual

8W-02 COMPONENT INDEX
Component Page
4WD Switch.......................... 8W-31
A/C Compressor Clutch Relay............ 8W-42
A/C Compressor Clutch................. 8W-42
A/C-Heater Control.................... 8W-42
A/C Heater Temperature Select........... 8W-42
A/C High Pressure Switch............... 8W-42
A/C Low Pressure Switch................ 8W-42
Accelerator Pedal Position Sensor......... 8W-30
Aftermarket Center High Mounted
Stop Lamp......................... 8W-51
Aftermarket Trailer Tow Connector........ 8W-54
Airbag Control Module.................. 8W-43
Ambient Temperature Sensor............ 8W-49
Ash Receiver Lamp.................... 8W-44
Automatic Day/Night Mirror............. 8W-49
Automatic Shut Down Relay............. 8W-30
Auxiliary Battery...................... 8W-20
Back-Up Lamp Switch.................. 8W-51
Back-Up Lamps....................... 8W-51
Battery Temperature Sensor............. 8W-30
Battery............................. 8W-20
Blend Door Actuator................... 8W-42
Blower Motor Relay.................... 8W-42
Blower Motor Resistor Block............. 8W-42
Blower Motor......................... 8W-42
Brake Lamp Switch.................... 8W-51
Brake Pressure Switch............... 8W-34, 35
Bypass Jumper....................... 8W-21
Camshaft Position Sensor............... 8W-30
Capacitor......................... 8W-10, 30
Cargo Lamps......................... 8W-44
Center High Mounted Stop Lamps........ 8W-51
Center Identification Lamp.............. 8W-50
Central Timer Module.................. 8W-45
Cigar Lighter......................... 8W-41
Circuit Breakers...................... 8W-12
Clockspring.................. 8W-33, 41, 43, 47
Clutch Pedal Position Switch............. 8W-21
Combination Flasher................... 8W-52
Controller Antilock Brake............ 8W-34, 35
Crankshaft Position Sensor.............. 8W-30
Cummins Bus........................ 8W-18
Cup Holder Lamp..................... 8W-44
Cylinder Lock Switches................ 8W-39
Data Link Connector................... 8W-18
Daytime Running Lamp Module.......... 8W-50
Dome Lamp.......................... 8W-44
Door Ajar Switches.................... 8W-45
Door Lock Motors..................... 8W-61
Door Window/Lock Switches.......... 8W-60, 61
Driver Airbag......................... 8W-43
Duty Cycle EVAP/Purge Solenoid......... 8W-30Component Page
Electric Brake Provision................ 8W-54
Engine Control Module.............. 8W-30, 70
Engine Coolant Temperature Sensor....... 8W-30
Engine Oil Pressure Sensor.............. 8W-30
Engine Starter Motor Relay.............. 8W-21
Engine Starter Motor................... 8W-21
Fender Lamp......................... 8W-51
Fog Lamp Indicator.................... 8W-50
Fog Lamp Relay....................... 8W-50
Fog Lamp............................ 8W-50
Fuel Heater Relay..................... 8W-30
Fuel Heater.......................... 8W-30
Fuel Injection Pump................... 8W-30
Fuel Injectors......................... 8W-30
Fuel Transfer Pump.................... 8W-30
Fuses (JB)........................... 8W-12
Fuses (PDC).......................... 8W-10
Fusible Link....................... 8W-20, 30
Generator............................ 8W-20
Glove Box Lamp And Switch............. 8W-44
Grounds............................. 8W-15
Headlamp Beam Select Switch........... 8W-50
Headlamp Switch...................... 8W-50
Headlamp........................... 8W-50
Heated Mirror Relay................... 8W-62
Heated Mirror Switch.................. 8W-62
Heated Seat Cushions.................. 8W-63
Heated Seat Relay..................... 8W-12
Heated Seat Switches.................. 8W-63
High Beam Indicator................... 8W-40
High Note Horn....................... 8W-41
Horn Relay.......................... 8W-41
Horn Switch.......................... 8W-41
Idle Air Control Motor.................. 8W-30
Ignition Coil 4-Pack.................... 8W-30
Ignition Coil 6-Pack.................... 8W-30
Ignition Coil.......................... 8W-30
Ignition Switch....................... 8W-10
Instrument Cluster.................... 8W-40
Intake Air Heater Relays................ 8W-30
Intake Air Heater..................... 8W-30
Intake Air Temperature Sensor........... 8W-30
Intermittent Wiper Switch............... 8W-53
Joint Connectors . . 8W-10, 12, 15, 30, 31, 34, 35, 40,
44, 45, 51, 53, 70
Junction Block........................ 8W-12
Leak Detection Pump.................. 8W-30
License Lamp......................... 8W-51
Low Note Horn....................... 8W-41
Lumbar Motors....................... 8W-63
Manifold Absolute Pressure Sensor........ 8W-30
Manifold Air Pressure Sensor............ 8W-30
BR/BE8W-02 COMPONENT INDEX 8W - 02 - 1

8W-30 FUEL/IGNITION SYSTEM
Component Page
A/C Compressor Clutch Relay.... 8W-30-14, 38, 39
A/C-Heater Control............... 8W-30-14, 39
A/C High Pressure Switch.......... 8W-30-14, 39
A/C Low Pressure Switch.......... 8W-30-14, 39
Accelerator Pedal Position Sensor....... 8W-30-30
Airbag Control Module............ 8W-30-40, 15
Automatic Shut Down Relay . . . 8W-30-3, 17, 18, 19,
22, 23, 24, 25, 26, 27, 28
Battery Temperature Sensor............ 8W-30-4
Battery........................... 8W-30-35
Brake Lamp Switch.............. 8W-30-7, 8, 37
Camshaft Position Sensor........... 8W-30-5, 32
Capacitor......................... 8W-30-28
Central Timer Module C2.......... 8W-30-15, 40
Clockspring...................... 8W-30-7, 34
Controller Antilock Brake.... 8W-30-13, 15, 38, 40
Crankshaft Position Sensor............ 8W-30-13
Cummins Bus...................... 8W-30-29
Data Link Connector...... 8W-30-2, 15, 16, 40, 41
Duty Cycle EVAP/Purge Solenoid....... 8W-30-13
Engine Control Module . . 8W-30-3, 7, 29, 30, 31, 32,
33, 34, 35, 36, 37, 39, 40, 41
Engine Coolant Temperature Sensor . . . 8W-30-9, 34
Engine Oil Pressure Sensor......... 8W-30-33, 13
Fuel Heater Relay................... 8W-30-36
Fuel Heater........................ 8W-30-36
Fuel Injection Pump.............. 8W-30-31, 37
Fuel Injector No. 1............... 8W-30-23, 26
Fuel Injector No. 2............... 8W-30-24, 27
Fuel Injector No. 3............... 8W-30-23, 26
Fuel Injector No. 4............... 8W-30-24, 27
Fuel Injector No. 5............... 8W-30-23, 26
Fuel Injector No. 6............... 8W-30-24, 27
Fuel Injector No. 7............... 8W-30-23, 26
Fuel Injector No. 8............... 8W-30-24, 27
Fuel Injector No. 9.................. 8W-30-26
Fuel Injector No. 10................. 8W-30-27
Fuel Pump Module.................. 8W-30-12
Fuel Pump Relay......... 8W-30-3, 11, 12, 31, 37
Fuel Tank Module................... 8W-30-42
Fuel Transfer Pump................. 8W-30-34
Fuse 3 (PDC)............... 8W-30-2, 11, 29, 37
Fuse 6 (PDC)....................... 8W-30-3
Fuse 7 (PDC)...................... 8W-30-36
Fuse 9 (JB)................. 8W-30-2, 3, 11, 36
Fuse 11 (JB)................. 8W-30-13, 36, 39
Fuse 12 (JB).................... 8W-30-16, 41
Fuse K (PDC).............. 8W-30-17, 18, 19, 22
Fusible Link....................... 8W-30-35
G100............................. 8W-30-12
G102.......................... 8W-30-36, 37
G105..................... 8W-30-2, 16, 20, 21Component Page
G107.......................... 8W-30-34, 36
G113 .......................... 8W-30-14, 34
G200.......................... 8W-30-16, 37
Generator...................... 8W-30-13, 38
Idle Air Control Motor................ 8W-30-9
Ignition Coil 4-Pack................. 8W-30-28
Ignition Coil 6-Pack................. 8W-30-28
Ignition Coil....................... 8W-30-25
Instrument Cluster............ 8W-30-15, 34, 40
Intake Air Heater Relay No. 1......... 8W-30-35
Intake Air Heater Relay No. 2......... 8W-30-35
Intake Air Heater................... 8W-30-35
Intake Air Temperature Sensor...... 8W-30-10, 32
Joint Connector No. 1 . . . 8W-30-4, 7, 12, 36, 37, 42
Joint Connector No. 2......... 8W-30-2, 3, 11, 17,
18, 19, 22, 23, 24, 25,
26, 27, 28, 29, 35, 37
Joint Connector No. 5............. 8W-30-16, 41
Joint Connector No. 7............. 8W-30-15, 40
Junction Block . . . 8W-30-2, 3, 11, 13, 16, 36, 39, 41
Leak Detection Pump................. 8W-30-8
Left Speed Control Switch............. 8W-30-7
Manifold Absolute Pressure Sensor...... 8W-30-10
Manifold Air Pressure Sensor.......... 8W-30-33
Output Speed Sensor................. 8W-30-5
Overdrive Switch.................... 8W-30-6
Overhead Console................ 8W-30-40, 15
Oxygen Sensor 1/1 Left Bank Up . . . 8W-30-18, 22, 20
Oxygen Sensor 1/1 Upstream.......... 8W-30-17
Oxygen Sensor 1/2 Downstream........ 8W-30-17
Oxygen Sensor 1/2 Left Bank Down..... 8W-30-20
Oxygen Sensor 1/2 Pre-Catalyst........ 8W-30-21
Oxygen Sensor 1/3 Post-Catalyst....... 8W-30-21
Oxygen Sensor 2/1 Right Bank Up . . . 8W-30-18, 22,
20
Oxygen Sensor 2/2 Right Bank Down.... 8W-30-20
Oxygen Sensor Downstream Relay...... 8W-30-19
Park/Neutral Position Switch....... 8W-30-13, 38
Power Distribution Center . . 8W-30-2, 3, 11, 17, 18,
22, 23, 24, 25, 26, 27, 28, 29, 36, 37
Powertrain Control Module . . 8W-30-2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15, 16 17,
18, 19, 20, 21, 22, 23, 24, 25 26, 27,
28, 36, 37,38, 39, 40, 41, 42
PTO Switch..................... 8W-30-14, 34
Radio.......................... 8W-30-15, 40
Right Speed Control Switch............ 8W-30-7
Speed Control Servo.................. 8W-30-5
Throttle Position Sensor.............. 8W-30-14
Transmission Control Relay............ 8W-30-5
Transmission Solenoid Assembly . . . 8W-30-6, 14, 39
Water In Fuel Sensor................ 8W-30-34
BR/BE8W-30 FUEL/IGNITION SYSTEM 8W - 30 - 1

Component Page
Crankshaft Position Sensor
(Gas Except 8.0L)................. 8W-80-34
Cummins Bus (Diesel)............... 8W-80-34
Cup Holder Lamp................... 8W-80-34
Data Link Connector................. 8W-80-35
Daytime Running Lamp Module........ 8W-80-35
Dome Lamp....................... 8W-80-35
Driver Airbag...................... 8W-80-35
Driver Cylinder Lock Switch........... 8W-80-36
Driver Door Ajar Switch (Premium)..... 8W-80-36
Driver Door Ajar Switch (Base)......... 8W-80-36
Driver Door Lock Motor.............. 8W-80-36
Driver Door Window/Lock Switch....... 8W-80-36
Driver Heated Seat Cushion........... 8W-80-37
Driver Heated Seat Switch............ 8W-80-37
Driver Lumbar Motor................ 8W-80-37
Driver Power Seat Front Vertical Motor
(Club Cab)....................... 8W-80-37
Driver Power Seat Front Vertical Motor
(Standard Cab)................... 8W-80-37
Driver Power Seat Horizontal Motor
(Club Cab)....................... 8W-80-38
Driver Power Seat Horizontal Motor
(Standard Cab)................... 8W-80-38
Driver Power Seat Rear Vertical Motor
(Club Cab)....................... 8W-80-38
Driver Power Seat Rear Vertical Motor
(Standard Cab)................... 8W-80-38
Driver Power Seat Switch (Club Cab).... 8W-80-38
Driver Power Seat Switch
(Standard Cab)................... 8W-80-39
Driver Power Window Motor........... 8W-80-39
Electric Brake Provision.............. 8W-80-39
Engine Control Module (Diesel)........ 8W-80-40
Engine Coolant Temperature Sensor
(Diesel)......................... 8W-80-41
Engine Coolant Temperature Sensor
(Gas)........................... 8W-80-41
Engine Oil Pressure Sensor (Diesel)..... 8W-80-41
Engine Oil Pressure Sensor (Gas)....... 8W-80-41
Evap/Purge Solenoid................. 8W-80-41
Front Washer Pump................. 8W-80-41
Fuel Heater (Diesel)................. 8W-80-42
Fuel Injection Pump (Diesel)........... 8W-80-42
Fuel Injector No. 1.................. 8W-80-42
Fuel Injector No. 2.................. 8W-80-42
Fuel Injector No. 3.................. 8W-80-42
Fuel Injector No. 4.................. 8W-80-43
Fuel Injector No. 5.................. 8W-80-43
Fuel Injector No. 6.................. 8W-80-43
Fuel Injector No. 7 (5.2L/5.9L/8.0L)..... 8W-80-43
Fuel Injector No. 8 (5.2L/5.9L/8.0L)..... 8W-80-43
Fuel Injector No. 9 (8.0L)............. 8W-80-43
Fuel Injector No. 10 (8.0L)............ 8W-80-44
Fuel Pump Module (Gas)............. 8W-80-44
Fuel Tank Module (Diesel)............ 8W-80-44
Fuel Transfer Pump (Diesel)........... 8W-80-44Component Page
G300............................. 8W-80-44
Generator......................... 8W-80-45
Glove Box Lamp And Switch........... 8W-80-45
Headlamp Switch C1................ 8W-80-45
Headlamp Switch C2................ 8W-80-45
Heated Mirror Switch................ 8W-80-45
High Note Horn.................... 8W-80-46
Idle Air Control Motor................ 8W-80-46
Ignition Coil (3.9L/5.2L/5.9L).......... 8W-80-46
Ignition Coil 4 Pack (8.0L)............ 8W-80-46
Ignition Coil 6 Pack (8.0L)............ 8W-80-46
Ignition Switch C1.................. 8W-80-47
Ignition Switch C2.................. 8W-80-47
Instrument Cluster C1............... 8W-80-47
Instrument Cluster C2............... 8W-80-47
Intake Air Heater Relays (Diesel)....... 8W-80-47
Intake Air Temperature Sensor (Diesel) . . 8W-80-48
Intake Air Temperature Sensor (Gas).... 8W-80-48
Joint Connector No. 1 (In PDC)........ 8W-80-48
Joint Connector No. 2 (In PDC)........ 8W-80-49
Joint Connector No. 3................ 8W-80-49
Joint Connector No. 4................ 8W-80-49
Joint Connector No. 5................ 8W-80-50
Joint Connector No. 6................ 8W-80-50
Joint Connector No. 7................ 8W-80-51
Joint Connector No. 8................ 8W-80-51
Junction Block C1................... 8W-80-52
Junction Block C2................... 8W-80-52
Junction Block C3................... 8W-80-52
Junction Block C4................... 8W-80-53
Junction Block C5................... 8W-80-53
Junction Block C6................... 8W-80-53
Junction Block C7................... 8W-80-53
Junction Block C8................... 8W-80-54
Junction Block C9................... 8W-80-54
Leak Detection Pump (Gas)........... 8W-80-54
Left Back-Up Lamp.................. 8W-80-54
Left Fog Lamp..................... 8W-80-54
Left Front Door Speaker (Premium)..... 8W-80-55
Left Front Door Speaker (Standard)..... 8W-80-55
Left Front Fender Lamp
(Dual Rear Wheels)................ 8W-80-55
Left Front Wheel Speed Sensor (ABS) . . . 8W-80-55
Left Headlamp..................... 8W-80-55
Left License Lamp.................. 8W-80-56
Left Outboard Clearance Lamp......... 8W-80-56
Left Outboard Headlamp............. 8W-80-56
Left Outboard Identification Lamp...... 8W-80-56
Left Park/Turn Signal Lamp........... 8W-80-56
Left Power Mirror................... 8W-80-56
Left Rear Fender Lamp
(Dual Rear Wheels)................ 8W-80-57
Left Rear Speaker (Premium 2 Door).... 8W-80-57
Left Rear Speaker (Premium 4 Door).... 8W-80-57
Left Rear Speaker (Standard 2 Door).... 8W-80-57
Left Rear Speaker (Standard 4 Door).... 8W-80-57
Left Remote Radio Switch............. 8W-80-57
8W - 80 - 2 8W-80 CONNECTOR PIN-OUTSBR/BE

ENGINE CONTROL MODULE (DIESEL) - 50 WAY
CAV CIRCUIT FUNCTION
1 H104 18BR/OR IDLE VALIDATION SWITCH NO. 1
2 K244 20YL/DB CUMMINS BUS (+)
3 K6 18VT/WT 5V SUPPLY
4 K14 18BK/DB SENSOR GROUND
5 F18 18LG/BK FUSED IGNITION SWITCH OUTPUT (RUN-START)
6 G60 18GY/BK ENGINE OIL PRESSURE SENSOR SIGNAL
7 K21 18BK/RD INTAKE AIR TEMPERATURE SENSOR SIGNAL
8 G12 18GY/RD MANIFOLD AIR PRESSURE SENSOR SIGNAL
9- -
10 K7 18OR 5V SUPPLY
11 K104 18BK/LB SENSOR GROUND
12 K246 20YL/DG CUMMINS BUS (-)
13 K242 20WT DATA LINK (+) FUEL INJECTION PUMP
14 K2 18TN/BK ENGINE COOLANT TEMPERATURE SENSOR SIGNAL
15 K135 18YL/WT TRANSFER PUMP SUPPLY
16 H105 18LG/DB IDLE VALIDATION SWITCH NO. 2
17 K124 18GY CAMSHAFT POSITION SENSOR SIGNAL
18 K48 18DG FUEL INJECTION PUMP SYNC SIGNAL
19 - -
20 - -
21 K1 18DG/RD WATER IN FUEL SENSOR SIGNAL
22 V37 18RD/LG SPEED CONTROL SWITCH SIGNAL
23 K240 20BK DATA LINK (-) FUEL INJECTOR PUMP
24 V32 18YL/RD BRAKE SWITCH SENSE
25 H102 18LB/BK ACCELERATOR PEDAL POSITION SENSOR SIGNAL
26 G113 18OR PTO SWITCH SENSE
27 - -
28 K22 18OR/DB ACCELERATOR PEDAL POSITION SENSOR SIGNAL
29 S21 18YL/BK AIR INTAKE HEATER RELAY NO.1
30 Z12 18BK/TN GROUND
31 H101 18DB/WT ACCELERATOR PEDAL POSITION SENSOR SUPPLY
32 H103 18BK/YL ACCELERATOR PEDAL POSITION SENSOR GROUND
33 K45 18LB/RD FUEL SHUT-OFF SIGNAL
34 K44 18VT/OR LOW IDLE SELECT
35 K135 18YL/WT TRANSFER PUMP SUPPLY
36 K131 18BR/WT FUEL INJECTOR PUMP RELAY CONTROL
37 G85 18OR/BK WAIT-TO-START WARNING INDICATOR DRIVER
38 D21 18PK/DB SCI TRANSMIT
39 D20 18DG SCI RECEIVE
40 D2 18WT/BK CCD BUS (-)
41 D1 18VT/BR CCD BUS (+)
42 K247 20DB CUMMINS BUS SHIELD
43 G7 18WT/OR VEHICLE SPEED SENSOR SIGNAL
44 K243 20OR/BR DATA LINK SHIELD FUEL INJECTOR PUMP
45 K24 18GY/BK CRANKSHAFT POSITION SENSOR SIGNAL
46 - -
47 S22 18OR/BK AIR INTAKE HEATER RELAY CONTROL NO. 2
48 A14 18RD/WT FUSED B(+)
49 Z12 18BK/TN GROUND
50 A14 18RD/WT FUSED B(+)
8W - 80 - 40 8W-80 CONNECTOR PIN-OUTSBR/BE

ENGINE COOLANT TEMPERATURE SENSOR (DIESEL)-2WAY
CAV CIRCUIT FUNCTION
B K2 18TN/BK ENGINE COOLANT TEMPERATURE SENSOR SIGNAL
A K104 18BK/LB SENSOR GROUND
ENGINE COOLANT TEMPERATURE SENSOR (GAS)-2WAY
CAV CIRCUIT FUNCTION
1 K4 18BK/LB SENSOR GROUND
2 K2 18TN/BK ENGINE COOLANT TEMPERATURE SENSOR SIGNAL
ENGINE OIL PRESSURE SENSOR (DIESEL)-3WAY
CAV CIRCUIT FUNCTION
A K7 18OR 5V SUPPLY
B K104 18BK/LB SENSOR GROUND
C G60 18GY/BK ENGINE OIL PRESSURE SENSOR SIGNAL
ENGINE OIL PRESSURE SENSOR (GAS)-2WAY
CAV CIRCUIT FUNCTION
1 K4 20BK/LB SENSOR GROUND
2 G60 18GY/OR ENGINE OIL PRESSURE SENSOR SIGNAL
EVAP/PURGE SOLENOID-2WAY
CAV CIRCUIT FUNCTION
1 K52 18PK/WT EVAPORATIVE EMISSION SOLENOID CONTROL
2 F12 20DB/WT FUSED IGNITION SWITCH OUTPUT (RUN-START)
FRONT WASHER PUMP - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 V10 16BR WASHER SWITCH SENSE
2 Z1 20BK GROUND
FRONT WASHER PUMP - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 V10 16BR WASHER SWITCH SENSE
2 Z1 20BK GROUND
BR/BE8W-80 CONNECTOR PIN-OUTS 8W - 80 - 41

POWERTRAIN CONTROL MODULE C1 (GAS) - BLACK 32 WAY
CAV CIRCUIT FUNCTION
1 K32 18YL/GY (8.0L) IGNITION COIL NO. 4 DRIVER
2 F18 18LG/BK FUSED IGNITION SWITCH OUTPUT (RUN-START)
3 K18 18RD/BK (8.0L) IGNITION COIL NO. 3 DRIVER
4 K4 18BK/LB SENSOR GROUND
5 K43 18DG/GY (8.0L) IGNITION COIL NO. 5 DRIVER
6 T41 18BK/WT (A/T) PARK/NEUTRAL POSITION SWITCH SENSE
7 K19 16BK/GY (3.9L/5.2L/5.9L) IGNITION COIL NO. 1 DRIVER
7 K19 18BK/GY (8.0L) IGNITION COIL NO. 1 DRIVER
8 K24 18GY/BK CRANKSHAFT POSITION SENSOR SIGNAL
9 K17 18DB/WT (8.0L) IGNITION COIL NO. 2 DRIVER
10 K60 18YL/BK IDLE AIR CONTROL NO. 2 DRIVER
11 K40 18BR/WT IDLE AIR CONTROL NO. 3 DRIVER
12 - -
13 G113 18OR PTO SWITCH SENSE
14 - -
15 K21 18BK/RD INTAKE AIR TEMPERATURE SENSOR SIGNAL
16 K2 18TN/BK ENGINE COOLANT TEMPERATURE SENSOR SIGNAL
17 K6 18VT/WT 5V SUPPLY
18 K44 18TN/YL CAMSHAFT POSITION SENSOR SIGNAL
19 K39 18GY/RD IDLE AIR CONTROL NO. 1 DRIVER
20 K59 18VT/BK IDLE AIR CONTROL NO. 4 DRIVER
21 - -
22 A14 16RD/WT FUSED B(+)
23 K22 18OR/DB THROTTLE POSITION SENSOR SIGNAL
24 K141 18TN/WT (3.9L/5.2L/5.9L) (CALI-
FORNIA EXCEPT 8.0L)OXYGEN SENSOR 1/1 SIGNAL
24 K41 18BK/DG (5.9L HD/8.0L) OXYGEN SENSOR 1/1 SIGNAL
25 K341 18OR/BK (3.9L/5.2L) (CALIFOR-
NIA)OXYGEN SENSOR 1/2 SIGNAL
25 K341 18OR/BK (8.0L) OXYGEN SENSOR 1/3 SIGNAL
26 K241 18LG/RD (8.0L) (5.9L HD) OXYGEN SENSOR 2/1 SIGNAL
26 K241 18LG/RD (CALIFORNIA) OXYGEN SENSOR 2/1 SIGNAL
27 K1 18DG/RD MAP SENSOR SIGNAL
28 - -
29 K441 18OR/TN (CALIFORNIA) OXYGEN SENSOR 2/2 SIGNAL
29 K141 18TN/WT (8.0L) OXYGEN SENSOR 1/2 SIGNAL
30 - -
31 Z12 14BK/TN GROUND
32 Z12 14BK/TN GROUND
POWERTRAIN CONTROL MODULE C2 (DIESEL) - BLACK 32 WAY
CAV CIRCUIT FUNCTION
1 T54 18VT (A/T) TRANSMISSION TEMPERATURE SENSOR SIGNAL
2- -
3- -
4- -
5- -
6- -
7- -
8 K88 18VT/WT (A/T) GOVERNOR PRESSURE SOLENOID CONTROL
BR/BE8W-80 CONNECTOR PIN-OUTS 8W - 80 - 67

Connector Name/Number Color Location Fig.
Cummins Bus (-) Left Front of Engine 10
Cup Holder Lamp Center of Instrument Panel 23,26
Data Link Connector BK Left Bottom of Instrument Panel 23,24
Day/Night Mirror BK Day/Night Mirror N/S
Daytime Running Lamp Module BK Left Fender Side Shield 14
Dome Lamp Rear of Cab 18
Driver Airbag BK Steering Wheel N/S
Driver Door Arm/Disarm Switch BK In Door 19
Driver Door Jamb Switch NAT Door Jamb 19
Driver Door Lock Motor BK In Door 19
Driver Door Window/Lock Switch BL In Door 19
Driver Heated Seat Module BL Under Seat N/S
Driver Heated Seat Switch RD Center of Instrument Panel N/S
Driver Lumbar Motor Under Seat N/S
Driver Power Seat Front Vertical Motor BK Under Seat N/S
Driver Power Seat Horizontal Motor BK Under Seat N/S
Driver Power Seat Rear Vertical Motor Under Seat N/S
Driver Power Seat Switch At Seat N/S
Driver Power Window Motor In Door 19
Duty Cycle EVAP/Purge Solenoid BK Right Fender Side Shield 17
Electric Brake Provision Bottom Left of Instrument Panel N/S
Engine Control Module (Diesel) Left Side Engine 12
Engine Coolant Temperature Sensor (Diesel) BK Left Front of Cylinder Head
(Diesel)10
Engine Coolant Temperature Sensor (Gas) BK On Thermostat Housing 3,6
Engine Oil Pressure Sensor (V6, V8) BK Near Distributor 3
Engine Oil Pressure Sensor (V10) Near Oil Filter 6
Engine Oil Pressure Sensor (Diesel) Left Side of Engine 12
Fuel Heater (Diesel) Left Side of Engine 10
Fuel Injection Pump (Diesel) Left Side of Engine, Below ECM 10
Fuel Injector No.1 BK At Fuel Injector 4,5
Fuel Injector No. 2 BK At Fuel Injector 4,5,6
Fuel Injector No. 3 BK At Fuel Injector 4,5,6
Fuel Injector No. 4 BK At Fuel Injector 4,5,6
Fuel Injector No. 5 BK At Fuel Injector 4,5,6
Fuel Injector No. 6 BK At Fuel Injector 4,5,6
Fuel Injector No. 7 BK At Fuel Injector 4,6
Fuel Injector No. 8 BK At Fuel Injector 4,6
Fuel Injector No. 9 BK At Fuel Injector 6
Fuel Injector No. 10 BK At Fuel Injector 6
Fuel Pump Module LTGY At Frame Rail 22
Fuel Transfer Pump (Diesel) Left Rear of Engine Bottom of
Pump10
BR/BE8W-90 CONNECTOR/GROUND LOCATIONS 8W - 90 - 3
CONNECTOR/GROUND LOCATIONS (Continued)

DIAGNOSIS AND TESTINGÐCYLINDER
COMPRESSION PRESSURE
The results of a cylinder compression pressure test
can be utilized to diagnose several engine malfunc-
tions.
Ensure the battery is completely charged and the
engine starter motor is in good operating condition.
Otherwise, the indicated compression pressures may
not be valid for diagnosis purposes.
(1) Clean the spark plug recesses with compressed
air.
(2) Remove the spark plugs (Refer to 8 - ELEC-
TRICAL/IGNITION CONTROL/SPARK PLUG -
REMOVAL).
(3) Secure the throttle in the wide-open position.
(4) Disconnect the ignition coil.
(5) Insert a compression pressure gauge and rotate
the engine with the engine starter motor for three
revolutions.
(6) Record the compression pressure on the third
revolution. Continue the test for the remaining cylin-
ders.
(Refer to 9 - ENGINE - SPECIFICATIONS) for the
correct engine compression pressures.
DIAGNOSIS AND TESTINGÐCYLINDER
COMBUSTION PRESSURE LEAKAGE
The combustion pressure leakage test provides an
accurate means for determining engine condition.
Combustion pressure leakage testing will detect:
²Exhaust and intake valve leaks (improper seat-
ing)
²Leaks between adjacent cylinders or into water
jacket²Any causes for combustion/compression pressure
loss
WARNING: DO NOT REMOVE THE RADIATOR CAP
WITH THE SYSTEM HOT AND UNDER PRESSURE.
SERIOUS BURNS FROM HOT COOLANT CAN
OCCUR.
Check the coolant level and fill as required. DO
NOT install the radiator cap.
Start and operate the engine until it attains nor-
mal operating temperature, then turn OFF the
engine.
Remove the spark plugs.
Remove the oil filler cap.
Remove the air cleaner.
Calibrate the tester according to the manufactur-
er's instructions. The shop air source for testing
should maintain 483 kPa (70 psi) minimum, 1,379
kPa (200 psi) maximum and 552 kPa (80 psi) recom-
mended.
Perform the test procedure on each cylinder accord-
ing to the tester manufacturer's instructions. While
testing, listen for pressurized air escaping through
the throttle body, tailpipe or oil filler cap opening.
Check for bubbles in the radiator coolant.
All gauge pressure indications should be equal,
with no more than 25% leakage.
FOR EXAMPLE:At 552 kPa (80 psi) input pres-
sure, a minimum of 414 kPa (60 psi) should be main-
tained in the cylinder.
Refer to CYLINDER COMBUSTION PRESSURE
LEAKAGE DIAGNOSIS CHART below
CYLINDER COMBUSTION PRESSURE LEAKAGE DIAGNOSIS CHART
CONDITION POSSIBLE CAUSE CORRECTION
AIR ESCAPES THROUGH
THROTTLE BODYIntake valve bent, burnt, or not
seated properlyInspect valve and valve seat.
Reface or replace, as necessary
AIR ESCAPES THROUGH
TAILPIPEExhaust valve bent, burnt, or not
seated properlyInspect valve and valve seat.
Reface or replace, as necessary
AIR ESCAPES THROUGH
RADIATORHead gasket leaking or cracked
cylinder head or blockRemove cylinder head and inspect.
Replace defective part
MORE THAN 50% LEAKAGE
FROM ADJACENT CYLINDERSHead gasket leaking or crack in
cylinder head or block between
adjacent cylindersRemove cylinder head and inspect.
Replace gasket, head, or block as
necessary
MORE THAN 25% LEAKAGE AND
AIR ESCAPES THROUGH OIL
FILLER CAP OPENING ONLYStuck or broken piston rings;
cracked piston; worn rings and/or
cylinder wallInspect for broken rings or piston.
Measure ring gap and cylinder
diameter, taper and out-of-round.
Replace defective part as necessary
BR/BEENGINE 3.9L 9 - 9
ENGINE 3.9L (Continued)

material is for use between two machined surfaces.
Do not use on flexible metal flanges.
MOPARtGASKET SEALANT
MopartGasket Sealant is a slow drying, perma-
nently soft sealer. This material is recommended for
sealing threaded fittings and gaskets against leakage
of oil and coolant. Can be used on threaded and
machined parts under all temperatures. This mate-
rial is used on engines with multi-layer steel (MLS)
cylinder head gaskets. This material also will pre-
vent corrosion. MopartGasket Sealant is available in
a 13 oz. aerosol can or 4oz./16 oz. can w/applicator.
FORM-IN-PLACE GASKET AND SEALER
APPLICATION
Assembling parts using a form-in-place gasket
requires care but it's easier then using precut gas-
kets.
MopartGasket Maker material should be applied
sparingly 1 mm (0.040 in.) diameter or less of sealant
to one gasket surface. Be certain the material sur-
rounds each mounting hole. Excess material can eas-
ily be wiped off. Components should be torqued in
place within 15 minutes. The use of a locating dowel
is recommended during assembly to prevent smear-
ing material off the location.
MopartEngine RTV GEN II or ATF RTV gasket
material should be applied in a continuous bead
approximately 3 mm (0.120 in.) in diameter. All
mounting holes must be circled. For corner sealing, a
3.17 or 6.35 mm (1/8 or 1/4 in.) drop is placed in the
center of the gasket contact area. Uncured sealant
may be removed with a shop towel. Components
should be torqued in place while the sealant is still
wet to the touch (within 10 minutes). The usage of a
locating dowel is recommended during assembly to
prevent smearing material off the location.
MopartGasket Sealant in an aerosol can should be
applied using a thin, even coat sprayed completely
over both surfaces to be joined, and both sides of a
gasket. Then proceed with assembly. Material in a
can w/applicator can be brushed on evenly over the
sealing surfaces. Material in an aerosol can should be
used on engines with multi-layer steel gaskets.
REMOVAL
(1) Disconnect the negative cable from the battery.
(2) Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
(3) Remove the upper crossmember and top core
support.
(4) Remove the transmission oil cooler (Refer to 7 -
COOLING/TRANSMISSION/TRANS COOLER -
REMOVAL).(5) Discharge the air conditioning system, if
equipped (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING - STANDARD PROCEDURE).
(6) Remove accessory drive belt (Refer to 7 -
COOLING/ACCESSORY DRIVE/DRIVE BELTS -
REMOVAL).
(7) Remove the A/C compressor with the lines
attached. Set aside.
(8) If equipped, remove the condenser (Refer to 24
- HEATING & AIR CONDITIONING/PLUMBING/
A/C CONDENSER - REMOVAL).
(9) Remove the washer bottle.
(10) Remove the fan and fan shroud (Refer to 7 -
COOLING/ENGINE/RADIATOR FAN - REMOVAL).
(11) Remove radiator (Refer to 7 - COOLING/EN-
GINE/RADIATOR - REMOVAL).
(12) Remove the generator with the wire connec-
tions (Refer to 8 - ELECTRICAL/CHARGING/GEN-
ERATOR - REMOVAL).
(13) Remove the air cleaner box.
(14) Disconnect the throttle linkage.
(15) Remove throttle body (Refer to 14 - FUEL
SYSTEM/FUEL INJECTION/THROTTLE BODY -
REMOVAL).
(16) Remove the intake manifold (Refer to 9 -
ENGINE/MANIFOLDS/INTAKE MANIFOLD -
REMOVAL).
(17) Remove the distributor cap and wiring.
(18) Disconnect the heater hoses.
(19) Disconnect the power steering hoses, if
equipped.
(20) Perform the Fuel System Pressure release
procedure (Refer to 14 - FUEL SYSTEM/FUEL
DELIVERY - STANDARD PROCEDURE).Disconnect
the fuel supply line (Refer to 14 - FUEL SYSTEM/
FUEL DELIVERY/QUICK CONNECT FITTING -
STANDARD PROCEDURE).
(21) On Manual Transmission vehicles, remove the
shift lever.
(22) Raise and support the vehicle on a hoist.
(23) Remove the drain plug and drain the engine
oil.
(24) Remove engine front mount through-bolt nuts.
(25)Automatic TransmissionRemove the trans-
mission cooler line brackets from oil pan.
(26) Disconnect exhaust pipe at manifold.
(27) Remove starter motor (Refer to 8 - ELECTRI-
CAL/STARTING/STARTER MOTOR - REMOVAL).
(28)Manual TransmissionRemove the transmis-
sion.(Refer to 21 - TRANSMISSION/TRANSAXLE/
MANUAL - REMOVAL).
(29) Lower the vehicle.
CAUTION: DO NOT lift the engine by the intake
manifold.
(30) Install an engine lifting fixture.
9 - 12 ENGINE 3.9LBR/BE
ENGINE 3.9L (Continued)

COOLING SYSTEM TESTER METHOD
WARNING: WITH COOLING SYSTEM TESTER IN
PLACE, PRESSURE WILL BUILD UP FAST. EXCES-
SIVE PRESSURE BUILT UP, BY CONTINUOUS
ENGINE OPERATION, MUST BE RELEASED TO A
SAFE PRESSURE POINT. NEVER PERMIT PRES-
SURE TO EXCEED 138 kPa (20 psi).
Install Cooling System Tester 7700 or equivalent to
pressure cap neck. Start the engine and observe the
tester's pressure gauge. If gauge pulsates with every
power stroke of a cylinder a combustion pressure
leak is evident.
CHEMICAL TEST METHOD
Combustion leaks into the cooling system can also
be checked by using Bloc-Chek Kit C-3685-A or
equivalent. Perform test following the procedures
supplied with the tool kit.
REMOVAL
The alloy cast iron cylinder heads (Fig. 7) are held
in place by eight bolts. The spark plugs are located
at the peak of the wedge between the valves.
(1) Disconnect the battery negative cable from the
battery.
(2) Drain cooling system. (Refer to 7 - COOLING -
STANDARD PROCEDURE).
(3) Remove the intake manifold-to-generator
bracket support rod. Remove the generator.
(4) Remove closed crankcase ventilation system.
(5) Disconnect the evaporation control system.
(6) Remove the air cleaner, air in-let hose and res-
onator.
(7) Perform fuel system pressure release procedure
(Refer to 14 - FUEL SYSTEM/FUEL DELIVERY -
STANDARD PROCEDURE).
(8) Disconnect the fuel supply line from the fuel
rail (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY/
QUICK CONNECT FITTING - STANDARD PROCE-
DURE).
(9) Disconnect accelerator linkage and if so
equipped, the speed control and transmission kick-
down cables.
(10) Remove distributor cap and wires.
(11) Disconnect the coil wires.
(12) Disconnect coolant temperature sending unit
wire.
(13) Disconnect heater hoses and bypass hose.
(14) Disconnect the vacuum supply hoses from the
intake manifold.
(15) Disconnect the fuel injector harness and
secure out of the way.
(16) Remove cylinder head covers and gaskets
(Refer to 9 - ENGINE/CYLINDER HEAD/CYLIN-
DER HEAD COVER(S) - REMOVAL).(17) Remove intake manifold and throttle body as
an assembly. Discard the flange side gaskets and the
front and rear cross-over gaskets.
(18) Remove exhaust manifolds (Refer to 9 -
ENGINE/MANIFOLDS/EXHAUST MANIFOLD -
REMOVAL).
(19) Remove rocker arm assemblies and push rods.
Identify to ensure installation in original locations.
(20) Remove the head bolts from each cylinder
head and remove cylinder heads. Discard the cylin-
der head gasket.
(21) Remove spark plugs.
CLEANING
Clean all surfaces of cylinder block and cylinder
heads.
Clean cylinder block front and rear gasket surfaces
using a suitable solvent.
INSPECTION
Inspect all surfaces with a straightedge if there is
any reason to suspect leakage. If out-of-flatness
exceeds 0.00075mm (0.0001in.) times the span length
in any direction, either replace head or lightly
machine the head surface.
FOR EXAMPLE:ÐA 305 mm (12 in.) span is
0.102 mm (0.004 in.) out-of-flat. The allowable out-of-
flat is 305 x 0.00075 (12 x 0.00075) equals 0.23 mm
(0.009 in.). This amount of out-of-flat is acceptable.
The cylinder head surface finish should be
1.78-3.00 microns (70-125 microinches).
Inspect push rods. Replace worn or bent rods.
INSTALLATION
The alloy cast iron cylinder heads (Fig. 7) are held
in place by eight bolts. The spark plugs are located
at the peak of the wedge between the valves.
(1) Position the new cylinder head gaskets onto
the cylinder block.
(2) Position the cylinder heads onto head gaskets
and cylinder block.
(3) Starting at top center, tighten all cylinder head
bolts, in sequence, to 68 N´m (50 ft. lbs.) torque (Fig.
7). Repeat procedure, tighten all cylinder head bolts
to 143 N´m (105 ft. lbs.) torque. Repeat procedure to
confirm that all bolts are at 143 N´m (105 ft. lbs.)
torque.
CAUTION: When tightening the rocker arm bolts, be
sure the piston in that cylinder is NOT at TDC. Con-
tact between the valves and piston could occur.
(4) Install push rods and rocker arm assemblies in
their original positions. Tighten the bolts to 28 N´m
(21 ft. lbs.) torque.
BR/BEENGINE 3.9L 9 - 23
CYLINDER HEAD (Continued)