clutch CHRYSLER VOYAGER 2003 Owners Manual
[x] Cancel search | Manufacturer: CHRYSLER, Model Year: 2003, Model line: VOYAGER, Model: CHRYSLER VOYAGER 2003Pages: 2177, PDF Size: 59.81 MB
Page 1108 of 2177
RIGHT SIDE IMPACT AIRBAG CONTROL MODULE - YELLOW/RED 7 WAY
CAV CIRCUIT FUNCTION
1 R32 18LB/OR RIGHT SEAT SQUIB LINE 1
2 R34 18LB/WT RIGHT SEAT SQUIB LINE 2
3- -
4 D25 20WT/VT PCI BUS
5 F214 18PK/LG SIACM RUN-START DRIVER
6- -
7 Z104 18BK/LG GROUND
RIGHT SLIDING DOOR CONTROL MODULE C1 (POWER SLIDING DOOR) - BLACK 8 WAY
CAV CIRCUIT FUNCTION
1 Q44 18OR/GY RIGHT CINCH/RELEASE MOTOR CLUTCH DRIVER
2 Q68 16TN/BR RIGHT SLIDING DOOR OPEN DRIVER
3 Q70 16TN/OR RIGHT SLIDING DOOR CLOSE DRIVER
4- -
5 A113 14WT/RD FUSED B(+)
6- -
7- -
8 Z124 14BK GROUND
RIGHT SLIDING DOOR CONTROL MODULE C2 (POWER SLIDING DOOR) - BLACK/RED
CAV CIRCUIT FUNCTION
1 Q72 20TN/VT RIGHT DOOR MOTOR HALL EFFECT SUPPLY
2- -
3 Q34 20OR/GY RIGHT DOOR LOCK SENSE
4 Q54 20OR/BR RIGHT DOOR IN/OUT HANDLE SWITCH SENSE
5- -
6- -
7 Q64 18OR/TN RIGHT DOOR MOTOR CLUTCH DRIVER
8 Q46 18TN/GY RIGHT CINCH/RELEASE MOTOR LATCH DRIVER
9 Q48 18TN/WT RIGHT CINCH/RELEASE MOTOR UNLATCH DRIVER
10 - -
11 D25 20WT/VT PCI BUS
12 G76 20TN/OR RIGHT SLIDING DOOR AJAR SWITCH SENSE
13 Q58 20OR/YL RIGHT PAWL SWITCH SENSE
14 Q52 20OR RIGHT FULL OPEN SWITCH SENSE
15 - GROUND-DRIVER SIDE IDENTIFIER (LHD/RHD)
16 - -
17 Q74 20TN/YL RIGHT DOOR MOTOR HALL EFFECT SIGNAL
18 - -
19 G152 20VT/GY RIGHT SLIDING DOOR WAKE UP SIGNAL
20 Z26 20BK/TN GROUND
RS8W-80 CONNECTOR PIN-OUTS8W - 80 - 127
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Page 1109 of 2177
RIGHT SLIDING DOOR LATCH SENSING SWITCH (POWER SLIDING DOOR) - BLACK 6 WAY
CAV CIRCUIT FUNCTION
1 Z76 20BK/YL GROUND
2 Q58 20OR/YL RIGHT PAWL SWITCH SENSE
3 G76 20TN/OR RIGHT SLIDING DOOR AJAR SWITCH SENSE
4 Z76 20BK/YL GROUND
5 Q54 20OR/BR RIGHT DOOR IN/OUT HANDLE SWITCH SENSE
6- -
RIGHT SLIDING DOOR LOCK MOTOR (POWER SLIDING DOOR) - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 P38 20TN/DB RIGHT SLIDING DOOR LOCK DRIVER
2 P34 20TN/LB RIGHT SLIDING DOOR UNLOCK DRIVER
3 Q34 20OR/GY RIGHT DOOR LOCK SENSE
4 Z76 20BK/YL GROUND
RIGHT SLIDING DOOR LOCK MOTOR/AJAR SWITCH (MANUAL SLIDING DOOR) - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 P38 20BK/DB RIGHT SLIDING DOOR LOCK DRIVER
2 P34 20BK/TN RIGHT SLIDING DOOR UNLOCK DRIVER
3 G76 20BK/DG RIGHT SLIDING DOOR AJAR SWITCH SENSE
4 Z76 20BK GROUND
RIGHT SLIDING DOOR MOTOR (POWER SLIDING DOOR) - BLACK 8 WAY
CAV CIRCUIT FUNCTION
1- -
2 Q72 20TN/VT RIGHT DOOR MOTOR HALL EFFECT SUPPLY
3 Q68 16TN/BR RIGHT SLIDING DOOR OPEN DRIVER
4 Z164 18BK/TN GROUND
5 Q64 18OR/TN RIGHT DOOR MOTOR CLUTCH DRIVER
6 Q70 16TN/OR RIGHT SLIDING DOOR CLOSE DRIVER
7 Z34 20BK/TN GROUND
8 Q74 20TN/YL RIGHT DOOR MOTOR HALL EFFECT SIGNAL
8W - 80 - 128 8W-80 CONNECTOR PIN-OUTSRS
ProCarManuals.com
Page 1116 of 2177
8W-91 CONNECTOR/GROUND/SPLICE LOCATION
TABLE OF CONTENTS
page
CONNECTOR/GROUND/SPLICE LOCATION
DESCRIPTION..........................1
CONNECTOR/GROUND/SPLICE
LOCATION
DESCRIPTION
This section provides illustrations identifying con-
nector, ground, and splice locations in the vehicle.
Connector, ground, and splice indexes are provided.Use the wiring diagrams in each section for connec-
tor, ground, and splice identification. Refer to the
appropriate index for the proper figure number. For
items that are not shown in this section N/S is placed
in the Fig. column.
CONNECTORS
CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
A/C Compressor Clutch LTGY Top of A/C Compressor 10, 11, 15, 17, 18
A/C-Heater Control C1 (MTC) BK/RD Rear of Control 19, 22, 24
A/C-Heater Control C2 (MTC) BK/BL Rear of Control 19, 22, 24
A/C Pressure Sensor GY At Throttle Body 10, 15, 16, 17
Accelerator Pedal Position
Sensor (Diesel)BK At Accelerator Pedal 41
Adjustable Pedals Module Near Brake Lamp Switch 40
Adjustable Pedals Switch Left Side Instrument Panel 20
Adjustable Pedals Relay Left Side Engine Compartment 6
Airbag Control Module YL/RD Right Side of Instrument Panel 19, 23, 24
Ambient Temperature Sensor BK On Radiator Closure Panel 1
ATC Remote Sensor Above ATC Control N/S
Automatic Day/Night Mirror BK At Mirror N/S
Autostick Switch BK Rear of Switch 20, 21, 22
Auto Temperature Control C1
(ATC)WT Rear of Control N/S
Auto Temperature Control C2
(ATC)BK Rear of Control N/S
Auto Temperature Control C3
(ATC)Rear of Control N/S
Back-Up Lamp Switch BK On Transmission 16
Battery Temperature Sensor BK At Battery N/S
Blower Motor Resistor C1 (MTC) BK Right Side of HVAC N/S
Blower Motor Resistor C2 (MTC) Right Side of HVAC N/S
Body Control Module C1 BK Under Left Instrument Panel 40, 41
Body Control Module C2 BK/GN Under Left Instrument Panel 40, 41
RS8W-91 CONNECTOR/GROUND/SPLICE LOCATION8W-91-1
ProCarManuals.com
Page 1118 of 2177
CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
C317 BK Right Sliding Door 31
C318 (Trailer Tow) BK Left Quarter N/S
C319 Left Side Liftgate N/S
C320 DKGY Driver Power Seat on Seat Harness N/S
C321 DKGY Under Passenger Seat N/S
C322 BK On Seat Harness to Body 31
C324 BK Left Sliding Door N/S
C325 BK Right Sliding Door 31
C326 YL At Driver Side Airbag N/S
C327 YL At Passenger Side Airbag N/S
C328 Front of Left Quarter 46
C329 (Diesel) BK Near Fuel Tank 33
C330 (Diesel) LTGY Left Rear Engine Compartment N/S
C331 (Diesel) BK Left Rear Engine Compartment N/S
Cabin Heater RHD) At Heater N/S
Cabin Heater Assist C1 (Diesel) BK Top of Engine 15, 16
Cabin Heater Assist C2 (Diesel) BK Top of Engine 15, 16
Camshaft Position Sensor (Gas) BK Rear of Cylinder Head
Right Side of Engine11
Camshaft Position Sensor
(Diesel)BK Rear of Cylinder Head 15, 16
CD Changer Behind CD Changer N/S
Center Dome Lamp GY At Lamp N/S
Center High Mounted Stop Lamp BK At Lamp 48
Clockspring - C1 WT Steering Column 19, 20, 21, 22, 30
Clockspring - C2 YL Steering Column 19, 20, 21, 22, 30
Clockspring - C3 BK Steering Column N/S
Clockspring - C4 BK Steering Column N/S
Clockspring - C5 YL Steering Column N/S
Clutch Pedal Interlock Switch
(Diesel)RD At Switch/Driver Side 41
Clutch Pedal Upstop Switch
(Diesel)BK At Switch/Driver Side 41
Controller Anti-Lock Brake BK Right Side of Engine Compartment 11, 16, 17, 18
Crank Case Ventilation Heater
(Diesel)BK Top of Cylinder Head 15
Crankshaft Position Sensor
(Diesel)BK Rear of Engine 16
Crankshaft Position Sensor (Gas) BK Rear of Engine 13, 17
Data Link Connector WT Lower Instrument Panel Near
Steering Column40, 41
Dosing Pump BK Top of Engine N/S
Driver Airbag Squib1 BN Steering Column N/S
Driver Airbag Squib2 BK Steering Column N/S
RS8W-91 CONNECTOR/GROUND/SPLICE LOCATION8W-91-3
CONNECTOR/GROUND/SPLICE LOCATION (Continued)
ProCarManuals.com
Page 1126 of 2177
CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Right Sliding Door Lock
Motor/Ajar SwitchBK At Latch N/S
Right Sliding Door Motor BK At Sliding Door 44
Right Speed Control Switch BK At Steering Wheel N/S
Right Stop/Turn Signal Relay BK LT Quarter Panel N/S
Right Turn Signal Lamp OR At Lamp N/S
Right Visor/Vanity Lamp BK At Lamp N/S
Sentry Key Immobilizer Module BK At Steering Column 19, 20, 21, 22, 30
Siren (United Kingdom) BK Left Front Body N/S
Solenoid/Pressure Switch
Assembly (EATX)BK Side of Transmission 14, 18
Speed Control Servo BK Near Controller Antilock Brake 11, 18
Sunroof Module BK At Sunroof N/S
Sunroof Switch Nat Near Overhead Console N/S
Thatcham Alarm Module C1 BK Top Right Side of Instrument Panel
Near SpeakerN/S
Thatcham Alarm Module C1 WT Top Right Side of Instrument Panel
Near SpeakerN/S
Throttle Position Sensor GY On Throttle Body 10, 11, 17
Torque Converter Clutch Solenoid BK Front of Transmission 11
Traction Control Switch BK Rear of Swtich 20, 21, 30
Trailer Tow Connector BK Left Quarter Panel N/S
Transmission Control Module BK Left Engine Compartment 5
Transmission Range Sensor GY Top of Transmission 14, 18
Turbo boost Pressure Sensor On Cylinder Block 15
Vehicle Speed Sensor BK Rear of Transmission 10, 16
Washer Fluid Level Switch BK Bottom of Reservoir 3
Water in Fuel Sensor (Diesel) Left Rear Engine Compartment N/S
Wiper Module BK Left Side Cowl 6
GROUNDS
GROUND NUMBER LOCATION FIG.
G100 Body Ground Near Powertrain Control Module N/S
G101 Above Starter 11, 13
G102 Left Headlamp Area 1
G103 Above Starter 11, 13
G200 Right Side of Instrument Panel 19, 23, 28
G201 Right Side of Instrument Panel 19, 23, 28
G202 Near Radio N/S
G300 Left B Pillar 31
G301 Right B Pillar 32, 38
G302 Left Rear Quarter 46
G400 Liftgate Ground N/S
RS8W-91 CONNECTOR/GROUND/SPLICE LOCATION8W-91-11
CONNECTOR/GROUND/SPLICE LOCATION (Continued)
ProCarManuals.com
Page 1127 of 2177
SPLICES
SPLICE NUMBER LOCATION FIG.
S101 800mm from T/O for G102 1
S102 500mm from T/O for G102 1
S103 (2.5L) Between T/O for Battery Temperature Sensor and T/O
for C10215
S104 Near T/O for G102 1
S106 (2.4L) 40mm from T/O for Torque Converter Clutch Solenoid 11
S106 (2.5L) Near T/O for Battery Temperature Sensor 15
S106 (3.3L/3.8L) Near T/O for G103 18
S107 (2.4L) In T/O for EGR Solenoid 11
S107 (2.5L) Between T/O for Engine Starter Motor and T/O for
Engine Control Module C116
S107 (3.3L/3.8L Export) Near T/O for Solenoid Pressure Switch 18
S107 (3.3L/3.8L Except
Export)Near T/O for Transmission Range Sensor 11
S108 (3.3L/3.8L) Near T/O for Speed Control Servo 18
S109 (3.3L/3.8L Export) Near T/O for Transmission Control Module N/S
S109 (3.3L/3.8L Except
Export)Near T/O for Solenoid/Pressure switch Assembly 18
S110 Near T/O to G102 1
S111 (2.4L) Near T/O for C101 11
S111 (2.5L) In T/O for Battery (-) 18
S111 (3.3L/3.8L) Near T/O for Output Speed Sensor 18
S112 Near T/O for Integrated Power Module - C3 11
S113 (2.4L) Near T/O for Park/Neutral Position Switch 11
S114 (2.4L) Near T/O for Powertrain Control Module C4 11
S114 (3.3L/3.8L) In T/O to Transmission Control Module 5
S115 (2.4L) Near T/O for Powertrain Control Module C4 11
S115 (3.3L/3.8L) In T/O to Transmission Control Module 5
S116 (2.4L) 180mm from T/O for Torque Converter Clutch Solenoid 11, 13
S116 (2.5L) Near T/O for Mass Air Flow Sensor 16
S116 (3.3L/3.8L) Near T/O for G103 18
S117 (2.4L) Neat T/O for G101 and G103 11
S117 (3.3L/3.8L) Near T/O for Output Speed Sensor 18
S118 (2.4L) Near T/O for Knock Sensor 11, 13
S119 (2.5L) Near T/O for Engine Starter Motor 15
S120 (2.4L) Near T/O for Oxygen Sensors N/S
S120 (3.3L/3.8L) Near T/O for Oxygen Sensors 18
S121 (3.3L/3.8L) Near T/O for Output Speed Sensor 18
S122 (2.4L) In T/O to Engine Starter Motor 11, 13
S122 (3.3L/3.8L) In T/O to Engine Starter Motor 18
S123 In T/O to Low Note Horn 5
S124 (2.4L) Near T/O for Fuel Injector No.2 N/S
8W - 91 - 12 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONRS
CONNECTOR/GROUND/SPLICE LOCATION (Continued)
ProCarManuals.com
Page 1128 of 2177
SPLICE NUMBER LOCATION FIG.
S124 (3.3L/3.8L) Near T/O for Fuel Injector No.5 and No.6 N/S
S125 (2.4L) In T/O for Manifold Absolute Pressure Sensor N/S
S126 In Right Headlamp Leveling Assembly N/S
S127 (2.5L) In T/O for Engine Starter Motor N/S
S128 (2.5L) Near T/O for Engine Starter Motor 15
S129 (2.5L) Near T/O for Battery (+) N/S
S130 (2.5L) Near T/O for Battery (+) N/S
S131 Near T/O for Transmission Control Module 11
S131 (3.3L/3.8L) Near T/O for Transmission Control Module N/S
S132 (2.5L) Near T/O for Battery (+) N/S
S133 (2.4L) Near T/O for Integrated Power Module C3 11
S134 (2.5L) IN T/O for Engine Control Module 15
S135 (2.5L) Near T/O for Glow Plug No.2 15
S136 (2.5L) In T/O for Radiator Fan Relays 2
S137 (2.5L) Near T/O for A/C Compressor Clutch 15
S138 (2.5L) Between T/O for Radiator Fan No.2 and T/O for G102 1
S139 (2.5L) Between T/O for Engine Starter Motor and T/O for
Engine Control Module C116
S141 (2.4L) Near T/O for Battery(-) 11
S141 (2.5L) Near T/O for G100 N/S
S141 (3.3L/3.8L) Near T/O for Powertrain Control Module N/S
S142 (3.3L/3.8L) Near T/O for A/C Compressor Clutch 18
S143 (2.5L) Near T/O for Engine Control Module C1 15
S143 (3.3L/3.8L) Near T/O for Integrated Power Module - C3 N/S
S144 (2.5L) Between T/O for Battery Temperature Sensor and T/O
for C10315
S148 (2.5L) Near T/O for Engine Starter Motor 15
S149 (3.3L/3.8L) Near T/O for Transmission Control Module 5
S150 (2.5L) Between T/O for Battery Temperature Sensor and T/O
for C10315
S151 (2.5L) Near T/O for Radiator Fan Relay No.1 2
S152 (2.5L) Near T/O for Radiator Fan No.1 1
S157 (2.5L) Near T/O for Glow Plug No.1 15
S177 In Right Headlamp Wiring Assembly N/S
S179 In Left Headlamp Wiring Assembly N/S
S187 (2.5L) In T/O for Engine Control Module C1 15
S188 (2.5L) Near T/O for Radiator Fan Relay No.1 2
S201 In T/O to Instrument Panel Speaker 19, 25
S202 Near T/O for Instrument Panel Switch Bank 19, 25
S203 Near T/O for Instrument Panel Switch Bank 19, 25
S204 Near T/O to Instrument Panel Speaker 19, 25
S205 Near T/O for C201 19
S206 Near T/O for Instrument Cluster 19
RS8W-91 CONNECTOR/GROUND/SPLICE LOCATION8W-91-13
CONNECTOR/GROUND/SPLICE LOCATION (Continued)
ProCarManuals.com
Page 1188 of 2177
(3) Remove torque converter or clutch housing
cover and inspect rear of block for evidence of oil.
Use a black light to check for the oil leak. If a leak is
present in this area, remove transmission for further
inspection.
(a) Circular spray pattern generally indicates
seal leakage or crankshaft damage.
(b) Where leakage tends to run straight down,
possible causes are a porous block, oil gallery cup
plug, bedplate to cylinder block mating surfaces
and seal bore. See proper repair procedures for
these items.
(4) If no leaks are detected, pressurize the crank-
case as previously described.
CAUTION: Do not exceed 20.6 kPa (3 psi).
(5) If the leak is not detected, very slowly turn the
crankshaft and watch for leakage. If a leak is
detected between the crankshaft and seal while
slowly turning the crankshaft, it is possible the
crankshaft seal surface is damaged. The seal area on
the crankshaft could have minor nicks or scratches
that can be polished out with emery cloth.
CAUTION: Use extreme caution when crankshaft
polishing is necessary to remove minor nicks and
scratches. The crankshaft seal flange is especially
machined to complement the function of the rear oil
seal.
(6) For bubbles that remain steady with shaft
rotation, no further inspection can be done until dis-
assembled.
(7) After the oil leak root cause and appropriate
corrective action have been identified, replace compo-
nent(s) as necessary.
DIAGNOSIS AND TESTING - CYLINDER
COMPRESSION PRESSURE TEST
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) Check engine oil level and add oil if necessary.
(2) Drive the vehicle until engine reaches normal
operating temperature. Select a route free from traf-
fic and other forms of congestion, observe all traffic
laws, and accelerate through the gears several times
briskly.
(3) Remove all spark plugs from engine. As spark
plugs are being removed, check electrodes for abnor-
mal firing indicators fouled, hot, oily, etc. Record cyl-
inder number of spark plug for future reference.(4) Remove the Auto Shutdown (ASD) relay from
the PDC.
(5) Be sure throttle blade is fully open during the
compression check.
(6) Insert compression gauge adaptor Special Tool
8116 or the equivalent, into the #1 spark plug hole in
cylinder head. Connect the 0±500 psi (Blue) pressure
transducer (Special Tool CH7059) with cable adap-
tors to the DRBIIIt. For Special Tool identification,
(Refer to 9 - ENGINE - SPECIAL TOOLS).
(7) Crank engine until maximum pressure is
reached on gauge. Record this pressure as #1 cylin-
der pressure.
(8) Repeat the previous step for all remaining cyl-
inders.
(9) Compression should not be less than 689 kPa
(100 psi) and not vary more than 25 percent from cyl-
inder to cylinder.
(10) If one or more cylinders have abnormally low
compression pressures, repeat the compression test.
(11) If the same cylinder or cylinders repeat an
abnormally low reading on the second compression
test, it could indicate the existence of a problem in
the cylinder in question.The recommended com-
pression pressures are to be used only as a
guide to diagnosing engine problems. An engine
should not be disassembled to determine the
cause of low compression unless some malfunc-
tion is present.
DIAGNOSIS AND TESTING - CYLINDER
COMBUSTION PRESSURE LEAKAGE TEST
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
jacket.
²Any causes for combustion/compression pressure
loss.
WARNING: DO NOT REMOVE THE PRESSURE CAP
WITH THE SYSTEM HOT AND UNDER PRESSURE
BECAUSE SERIOUS BURNS FROM COOLANT CAN
OCCUR.
Check the coolant level and fill as required. DO
NOT install the pressure cap.
Start and operate the engine until it attains nor-
mal operating temperature, then turn the engine
OFF.
Clean spark plug recesses with compressed air.
Remove the spark plugs.
Remove the oil filler cap.
Remove the air cleaner.
RSENGINE 2.4L9-9
ENGINE 2.4L (Continued)
ProCarManuals.com
Page 1262 of 2177
(3) Remove torque converter or clutch housing
cover and inspect rear of block for evidence of oil.
Use a black light to check for the oil leak. If a leak is
present in this area, remove transmission for further
inspection.
(a) Circular spray pattern generally indicates
seal leakage or crankshaft damage.
(b) Where leakage tends to run straight down,
possible causes are a porous block, oil gallery cup
plug, bedplate to cylinder block mating surfaces
and seal bore. See proper repair procedures for
these items.
(4) If no leaks are detected, pressurize the crank-
case as previously described.
CAUTION: Do not exceed 20.6 kPa (3 psi).
(5) If the leak is not detected, very slowly turn the
crankshaft and watch for leakage. If a leak is
detected between the crankshaft and seal while
slowly turning the crankshaft, it is possible the
crankshaft seal surface is damaged. The seal area on
the crankshaft could have minor nicks or scratches
that can be polished out with emery cloth.
CAUTION: Use extreme caution when crankshaft
polishing is necessary to remove minor nicks and
scratches. The crankshaft seal flange is especially
machined to complement the function of the rear oil
seal.
(6) For bubbles that remain steady with shaft
rotation, no further inspection can be done until dis-
assembled.
(7) After the oil leak root cause and appropriate
corrective action have been identified, replace compo-
nent(s) as necessary.
DIAGNOSIS AND TESTING - CYLINDER
COMPRESSION PRESSURE TEST
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) Check engine oil level and add oil if necessary.
(2) Drive the vehicle until engine reaches normal
operating temperature. Select a route free from traf-
fic and other forms of congestion, observe all traffic
laws, and accelerate through the gears several times
briskly.
(3) Remove all spark plugs from engine. As spark
plugs are being removed, check electrodes for abnor-
mal firing indicators fouled, hot, oily, etc. Record cyl-
inder number of spark plug for future reference.(4) Remove the Auto Shutdown (ASD) relay from
the PDC.
(5) Be sure throttle blade is fully open during the
compression check.
(6) Insert compression gauge adaptor Special Tool
8116 or the equivalent, into the #1 spark plug hole in
cylinder head. Connect the 0±500 psi (Blue) pressure
transducer (Special Tool CH7059) with cable adap-
tors to the DRBIIIt. For Special Tool identification,
(Refer to 9 - ENGINE - SPECIAL TOOLS).
(7) Crank engine until maximum pressure is
reached on gauge. Record this pressure as #1 cylin-
der pressure.
(8) Repeat the previous step for all remaining cyl-
inders.
(9) Compression should not be less than 689 kPa
(100 psi) and not vary more than 25 percent from cyl-
inder to cylinder.
(10) If one or more cylinders have abnormally low
compression pressures, repeat the compression test.
(11) If the same cylinder or cylinders repeat an
abnormally low reading on the second compression
test, it could indicate the existence of a problem in
the cylinder in question.The recommended com-
pression pressures are to be used only as a
guide to diagnosing engine problems. An engine
should not be disassembled to determine the
cause of low compression unless some malfunc-
tion is present.
DIAGNOSIS AND TESTING - CYLINDER
COMBUSTION PRESSURE LEAKAGE TEST
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
jacket.
²Any causes for combustion/compression pressure
loss.
WARNING: DO NOT REMOVE THE PRESSURE CAP
WITH THE SYSTEM HOT AND UNDER PRESSURE
BECAUSE SERIOUS BURNS FROM COOLANT CAN
OCCUR.
Check the coolant level and fill as required. DO
NOT install the pressure cap.
Start and operate the engine until it attains nor-
mal operating temperature, then turn the engine
OFF.
Clean spark plug recesses with compressed air.
Remove the spark plugs.
Remove the oil filler cap.
Remove the air cleaner.
RSENGINE 3.3/3.8L9-83
ENGINE 3.3/3.8L (Continued)
ProCarManuals.com
Page 1378 of 2177
1 second. Therefore, battery voltage is not supplied to
the fuel pump, ignition coil, fuel injectors and heated
oxygen sensors.
ENGINE START-UP MODE
This is an OPEN LOOP mode. If the vehicle is in
park or neutral (automatic transaxles) or the clutch
pedal is depressed (manual transaxles) the ignition
switch energizes the starter relay when the engine is
not running. The following actions occur when the
starter motor is engaged.
²If the PCM receives the camshaft position sensor
and crankshaft position sensor signals, it energizes
the Auto Shutdown (ASD) relay and fuel pump relay.
If the PCM does not receive both signals within
approximately one second, it will not energize the
ASD relay and fuel pump relay. The ASD and fuel
pump relays supply battery voltage to the fuel pump,
fuel injectors, ignition coil, (EGR solenoid and PCV
heater if equipped) and heated oxygen sensors.
²The PCM energizes the injectors (on the 69É
degree falling edge) for a calculated pulse width until
it determines crankshaft position from the camshaft
position sensor and crankshaft position sensor sig-
nals. The PCM determines crankshaft position within
1 engine revolution.
²After determining crankshaft position, the PCM
begins energizing the injectors in sequence. It adjusts
injector pulse width and controls injector synchroni-
zation by turning the individual ground paths to the
injectors On and Off.
²When the engine idles within 64 RPM of its
target RPM, the PCM compares current MAP sensor
value with the atmospheric pressure value received
during the Ignition Switch On (zero RPM) mode.
Once the ASD and fuel pump relays have been
energized, the PCM determines injector pulse width
based on the following:
²MAP
²Engine RPM
²Battery voltage
²Engine coolant temperature
²Inlet/Intake air temperature (IAT)
²Throttle position
²The number of engine revolutions since cranking
was initiated
During Start-up the PCM maintains ignition tim-
ing at 9É BTDC.
ENGINE WARM-UP MODE
This is an OPEN LOOP mode. The following inputs
are received by the PCM:
²Manifold Absolute Pressure (MAP)
²Crankshaft position (engine speed)
²Engine coolant temperature
²Inlet/Intake air temperature (IAT)²Camshaft position
²Knock sensor
²Throttle position
²A/C switch status
²Battery voltage
²Vehicle speed
²Speed control
²O2 sensors
The PCM adjusts injector pulse width and controls
injector synchronization by turning the individual
ground paths to the injectors On and Off.
The PCM adjusts ignition timing and engine idle
speed. Engine idle speed is adjusted through the idle
air control motor.
CRUISE OR IDLE MODE
When the engine is at operating temperature this
is a CLOSED LOOP mode. During cruising or idle
the following inputs are received by the PCM:
²Manifold absolute pressure
²Crankshaft position (engine speed)
²Inlet/Intake air temperature
²Engine coolant temperature
²Camshaft position
²Knock sensor
²Throttle position
²Exhaust gas oxygen content (O2 sensors)
²A/C switch status
²Battery voltage
²Vehicle speed
The PCM adjusts injector pulse width and controls
injector synchronization by turning the individual
ground paths to the injectors On and Off.
The PCM adjusts engine idle speed and ignition
timing. The PCM adjusts the air/fuel ratio according
to the oxygen content in the exhaust gas (measured
by the upstream and downstream heated oxygen sen-
sor).
The PCM monitors for engine misfire. During
active misfire and depending on the severity, the
PCM either continuously illuminates or flashes the
malfunction indicator lamp (Check Engine light on
instrument panel). Also, the PCM stores an engine
misfire DTC in memory, if 2nd trip with fault.
The PCM performs several diagnostic routines.
They include:
²Oxygen sensor monitor
²Downstream heated oxygen sensor diagnostics
during open loop operation (except for shorted)
²Fuel system monitor
²EGR monitor (if equipped)
²Purge system monitor
²Catalyst efficiency monitor
²All inputs monitored for proper voltage range,
rationality.
RSFUEL INJECTION14-19
FUEL INJECTION (Continued)
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