check engine ISUZU TF SERIES 2004 Workshop Manual

6D1-2 ENGINE ELECTRICAL (6VE1 3.5L)
Battery
General Description
There are six battery fluid caps on the top of the battery.
These are covered by a paper label.
The battery is completely sealed except for the six small
vent holes on the side. These vent holes permit the
escape of small amounts of gas generated by the
battery.
This type of battery has the following advantages ove
r
conventional batteries:
1. There is no need to add water during the entire
service life of the battery.
2. The battery protects itself against overcharging.
The battery will refuse to accept an extensive
charge.
(A conventional battery will accept an excessive
charge, resulting in gassing and loss of battery
fluid.)
3. The battery is much less vulnerable to sel
f
discharge than a conventional type battery.
Diagnosis
1. Visual Inspection
Inspect the battery for obvious physical damage, such
as a cracked or broken case, which would permi
t
electrolyte loss.
Replace the battery if obvious physical damage is
discovered during inspection.
Check for any other physical damage and correct it as
necessary.


2. Fluid Level Check
The fluid level should be between the upper level line(1)
and lower level line(2) on side of battery.
a. CORRECT FLUID LEVEL – Charge the battery.
b. BELOW LOWER LEVEL – Replace battery.



RTW36DSH000101
3. Voltage Check
1. Put voltmeter test leads to battery terminals.
a. VOLTAGE IS 12.4V OR ABOVE – Go to Step 5.
b. VOLTAGE IS UNDER 12.4V – Go to procedure
(2) below.
2. Determine fast charge amperage from specification.
(See Main Data and Specifications in this section).
Fast charge battery for 30 minutes at amperage
rate no higher than specified value.
Take voltage and amperage readings after charge.
a. VOLTAGE IS ABOVE 16V AT BELOW 1/3 OF
AMPERAGE RATE – Replace battery.
b. VOLTAGE IS ABOVE 16V AT ABOVE 1/3 OF
AMPERAGE RATE – Drop charging voltage to
15V and charge for 10 – 15 hours. Then go to
Step 5.
c. VOLTAGE IS BETWEEN 12V AND 16V –
Continue charging at the same rate for an
additional 3–1/2 hours. Then go to Step 5.
d. VOLTAGE BELOW 12V – Replace Battery.

6D2-4 IGNITION SYSTEM (6VE1 3.5L)
Spark Plug
Inspection
Poor spark plug condition adversely affects engine
performance. Carefully inspect each spark plug
following the procedure outlined below.
1. Remove the spark plug.
2. Check the plug for dirt and other foreign material.
If the plug is extremely dirty, the fuel and electrical
systems must be checked.
3. If necessary, clean the spark plugs by placing them
in a spark plug cleaning machine for no more than
20 seconds.
4. Check the electrode and insulator for wear and/o
r
cracking. If there is significant wear or cracking, the
plug must be replaced.
5. Check the gasket for damage. Replace the gasket i
f
necessary.
6. Measure the insulation resistance with a 500-vol
t
megaohm meter. Replace the plug if the resistance
is less than the specified value.
Insulation resistance: 50 M





or more




011RS010

7. Check the spark plug gap. Replace the spark plug
the if gap is not as specified.
Standard: 1.0–1.1 mm (0.04–0.043 in)
Limit: 1.3 mm (0.05 in)





011RS011
 Do not attempt to adjust the gap of an old spark
plug. Replace the plug and adjust the gap of the
new plug if required.
 Take care not to damage the spark plug tip
during handling.
8. Tighten the spark plugs to the specified torque.
Torque: 18 N




m (1.8 kg




m/13 lb ft)
Replacement spark plugs
 Under normal conditions (no problem with the fuel
and/or electrical systems), use replacement spark
plugs with a low heat value (hot-type plug).
 If insulator and electrode scorching is significant,
use replacement spark plugs with a high heat value
(cold-type plug).

STARTING AND CHARGING SYSTEM (6VE1 3.5L) 6D3-15
Charging System
General Description
The IC integral regulator charging system and its main
components are connected as shown in illustration.
The regulator is a solid state type and it is mounted
along with the brush holder assembly inside the
generator installed on the rear end cover.
The generator does not require particular maintenance
such as voltage adjustment.
The rectifier connected to the stator coil has eigh
t
diodes to transform AC voltage into DC voltage.
This DC voltage is connected to the output terminal o
f
generator.

General On–Vehicle Inspection
The operating condition of charging system is indicated
by the charge warning lamp. The warning lamp comes
on when the starter switch is turned to “ON" position.
The charging system operates normally if the lamp
goes off when the engine starts.
If the warning lamp shows abnormality or i
f
undercharged or overcharged battery condition is
suspected, perform diagnosis by checking the charging
system as follows:
1. Check visually the belt and wiring connector.
2. With the engine stopped, turn the stator switch to
“ON" position and observe the warning lamp.
If lamp does not come on:
Disconnect wiring connector from generator, and
ground the terminal “L" on connector side.
If lamp comes on:
Repair or replace the generator.




F06RW009

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-1
ENGINE
3.5L ENGINE DRIVEABILITY AND EMISSIONS
CONTENTS


ABBREVIATION CHARTS ................................ 6E-5
COMPONENT LOCATOR ................................. 6E-6
ENGINE COMPONENT LOCATOR TABLE .. 6E-6
ECM CIRCUIT DIAGRAM ................................. 6E-10
GROUND POINT CHART G.EXP (LHD)
WITHOUT EUROPE, ISRAEL, TURKEY (1/4). 6E-13
GROUND POINT CHART G.EXP (LHD) (2/4) .. 6E-14
GROUND POINT CHART G.EXP (LHD) (3/4) .. 6E-15
GROUND POINT CHART G.EXP (LHD) (4/4) .. 6E-16
GROUND POINT CHART G.EXP (RHD) (1/4) . 6E-17
GROUND POINT CHART G.EXP (RHD) (2/4) . 6E-18
GROUND POINT CHART G.EXP (RHD) (3/4) . 6E-19
GROUND POINT CHART G.EXP (RHD) (4/4) . 6E-20
LOCATION ........................................................ 6E-21
CABLE HARNESS & CONNECTOR
LOCATION ....................................................... 6E-22
CONNECTOR LIST ........................................... 6E-27
RELAY AND FUSE ............................................ 6E-30
RELAY AND FUSE BOX LOCATION
(LHD&RHD) ................................................... 6E-30
RELAY AND FUSE BOX LOCATION
(LHD&RHD) ................................................... 6E-31
FUSE AND RELAY LOCATION
(LHD&RHD) ................................................... 6E-32
ECM WIRING DIAGRAM (1/10) ........................ 6E-33
ECM WIRING DIAGRAM (2/10) ........................ 6E-34
ECM WIRING DIAGRAM (3/10) ........................ 6E-35
ECM WIRING DIAGRAM (4/10) ........................ 6E-36
ECM WIRING DIAGRAM (5/10) ........................ 6E-37
ECM WIRING DIAGRAM (6/10) ........................ 6E-38
ECM WIRING DIAGRAM (7/10) ........................ 6E-39
ECM WIRING DIAGRAM (8/10) ........................ 6E-40
ECM WIRING DIAGRAM (9/10) ........................ 6E-41
ECM WIRING DIAGRAM (10/10) ...................... 6E-42
ECM CONNECTOR PIN ASSIGNMENT
& OUTPUT SIGNAL ......................................... 6E-43
GENERAL DESCRIPTION FOR ECM AND
SENSORS ........................................................ 6E-51

Mass Air Flow (MAF) Sensor & Intake Air
Temperature (IAT) Sensor ............................. 6E-52
Throttle Position Sensor (TPS)....................... 6E-52
Idle Air Control (IAC) Valve ............................ 6E-53
Camshaft Position (CMP) Sensor .................. 6E-53
Crankshaft Position (CKP) Sensor ................. 6E-54
Engine Coolant Temperature (ECT) Sensor .. 6E-54
Vehicle Speed Sensor (VSS) ......................... 6E-55
Heated Oxygen (O
2) Sensor........................... 6E-55
GENERAL DESCRIPTION FOR FUEL
METERING....................................................... 6E-56
GENERAL DESCRIPTION FOR ELECTRONIC
IGNITION SYSTEM IGNITION
COILS & CONTROL ......................................... 6E-58
GENERAL DESCRIPTION FOR EVAPORATIVE
EMISSION SYSTEM ........................................ 6E-61
GENERAL DESCRIPRION FOR EXHAUST
GAS RECIRCULATION (EGR) SYSTEM......... 6E-62
ISUZU STRATEGY BASED DIAGNOSTICS .... 6E-63
Diagnostic Thought Process .......................... 6E-64
1. Verify the Complaint ................................... 6E-64
2. Perform Preliminary Checks....................... 6E-64
3. Check Bulletins and Troubleshooting
Hints ........................................................... 6E-65
4. Perform Service Manual Diagnostic
Checks ....................................................... 6E-65
5a and 5b. Perform Service Manual
Diagnostic Procedures ............................... 6E-65
5c. Technician Self Diagnoses ....................... 6E-65
5d. Intermittent Diagnosis............................ 6E-66
Symptom Simulation Tests.......................... 6E-67
5e. Vehicle Operates as Designed ................. 6E-68
6. Re-Examine the Complaint ........................ 6E-68
7. Repair and Verify Fix .................................. 6E-68
GENERAL SERVICE INFORMATION .............. 6E-69
Aftermarket Electrical and Vacuum
Equipment ..................................................... 6E-69
Electrostatic Discharge Damage .................... 6E-69

6E-2 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Visual/Physical Engine Compartment
Inspection ...................................................... 6E-74
Basic Knowledge of Tools Required............... 6E-71
Serial Data Communications .......................... 6E-71
On-Board Diagnostic (OBD) ........................... 6E-71
Comprehensive Component Monitor
Diagnostic Operation ..................................... 6E-71
The Diagnostic Executive ............................... 6E-72
Verifying Vehicle Repair ................................. 6E-73
Reading Flash Diagnostic Trouble Codes ...... 6E-73
Reading Diagnostic Trouble Codes Using
a Tech 2......................................................... 6E-73
On-Board Diagnosis (Self-Diagnosis)............. 6E-74
Diagnosis with Tech 2 .................................... 6E-75
TYPICAL SCAN DATA & DEFINITIONS
(ENGINE DATA) ............................................... 6E-79
TYPICAL SCAN DATA & DEFINITIONS
(O2 SENSOR DATA)........................................ 6E-81
MISCELLANEOUS TEST .................................. 6E-83
PLOTTING SNAPSHOT GRAPH ...................... 6E-85
Plotting Graph Flow Chart (Plotting graph
after obtaining vehicle information)................ 6E-86
Flow Chart for Snapshot Replay
(Plotting Graph) ............................................. 6E-87
SNAPSHOT DISPLAY WITH TIS2000.............. 6E-88
SERVICE PROGRAMMING SYSTEM (SPS).... 6E-91
HOW TO USE BREAKER BOX ........................ 6E-94
ON-BOARD DIAGNOSTIC (OBD) SYSTEM
CHECK ............................................................. 6E-97
NO CHECK ENGINE LAMP (MIL)..................... 6E-101
CHECK ENGINE LAMP (MIL) "ON" STEADY ... 6E-104
FUEL INJECTOR COIL TEST PROCEDURE
AND FUEL INJECTOR BALANCE
TEST PROCEDURE ......................................... 6E-106
FUEL SYSTEM ELECTRICAL TEST ................ 6E-111
FUEL SYSTEM DIAGNOSIS ............................. 6E-116
A/C SYSTEM CIRCUIT DIAGNOSIS ................ 6E-122
ECM DIAGNOSTIC TROUBLE CODES (DTC) 6E-130
MULTIPLE DTC SETS TROUBLESHOOTING
AIDS ................................................................. 6E-142
DTC P0101 (FLASH CODE 61) MASS
AIR FLOW SENSOR CIRCUIT
RANGE/PERFORMANCE ................................ 6E-146
DTC P0102 (FLASH CODE 61) MASS
AIR FLOW SENSOR CIRCUIT LOW INPUT ... 6E-149
DTC P0103 (FLASH CODE 61) MASS
AIR FLOW SENSOR CIRCUIT HIGH INPUT .. 6E-154
DTC P0112 (FLASH CODE 23) INTAKE AIR
TEMPERATURE (IAT) SENSOR LOW
INPUT ............................................................... 6E-158 DTC P0113 (FLASH CODE 23) INTAKE AIR
TEMPERATURE (IAT) SENSOR HIGH
INPUT ............................................................... 6E-163
DTC P0117 (FLASH CODE 14) ENGINE
COOLANT TEMPERATURER (ECT)
SENSOR LOW INPUT ..................................... 6E-168
DTC P0118 (FLASH CODE 14) ENGINE
COOLANT TEMPERATURER (ECT)
SENSOR HIGH INPUT..................................... 6E-173
DTC P0121 (FLASH CODE 21) THROTTLE
POSITION SENSOR (TPS) CIRCUIT
RANGE/PERFORMANCE ................................ 6E-179
DTC P0122 (FLASH CODE 21) THROTTLE
POSITION SENSOR (TPS) CIRCUIT
LOW INPUT ..................................................... 6E-183
DTC P0123 (FLASH CODE 21) THROTTLE
POSITION SENSOR (TPS) CIRCUIT
HIGH INPUT ..................................................... 6E-188
DTC P0131 (FLASH CODE 15) O2 SENSOR
CIRCUIT LOW VOLTAGE
(BANK 1 SENSOR 1) ....................................... 6E-193
DTC P0151 (FLASH CODE 15) O2 SENSOR
CIRCUIT LOW VOLTAGE
(BANK 2 SENSOR 1) ....................................... 6E-193
DTC P0132 (FLASH CODE 15) O2 SENSOR
CIRCUIT HIGH VOLTAGE
(BANK 1 SENSOR 1) ....................................... 6E-201
DTC P0152 (FLASH CODE 15) O2
SENSOR CIRCUIT HIGH VOLTAGE
(BANK 2 SENSOR 1) ....................................... 6E-201
DTC P0134 (FLASH CODE 15) O2 SENSOR
CIRCUIT NO ACTIVITY DETECTED
(BANK 1 SENSOR 1) ....................................... 6E-207
DTC P0154 (FLASH CODE 15) O2 SENSOR
CIRCUIT NO ACTIVITY
DETECTED (BANK 2 SENSOR 1) ................... 6E-207
DTC P0171 (FLASH CODE 44) O2 SENSOR
SYSTEM TOO LEAN (BANK 1) ....................... 6E-211
DTC P0174 (FLASH CODE 44) O2 SENSOR
SYSTEM TOO LEAN (BANK 2) ....................... 6E-211
DTC P0172 (FLASH CODE 45) O2 SENSOR
SYSTEM TOO RICH (BANK 1) ........................ 6E-216
DTC P0175 (FLASH CODE 45) O2 SENSOR
SYSTEM TOO RICH (BANK 2) ........................ 6E-216
DTC P1171 (FLASH CODE 44) FUEL
SUPPLY SYSTEM LEAN DURING POWER
ENRICHMENT (TYPE A) ................................. 6E-221
DTC P1172 (FLASH CODE 44) FUEL SUPPLY
SYSTEM LEAN DURING POWER
ENRICHMENT (TYPE B) ................................. 6E-221

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-3
DTC P0201 (FLASH CODE 31) INJECTOR 1
CONTROL CIRCUIT ........................................ 6E-226
DTC P0202 (FLASH CODE 31) INJECTOR 2
CONTROL CIRCUIT ........................................ 6E-226
DTC P0203 (FLASH CODE 31) INJECTOR 3
CONTROL CIRCUIT ........................................ 6E-226
DTC P0204 (FLASH CODE 31) INJECTOR 4
CONTROL CIRCUIT ........................................ 6E-226
DTC P0205 (FLASH CODE 31) INJECTOR 5
CONTROL CIRCUIT ........................................ 6E-226
DTC P0206 (FLASH CODE 31) INJECTOR 6
CONTROL CIRCUIT ........................................ 6E-226
DTC P0336 (FLASH CODE 29) CRANKSHAFT
POSITION SENSOR CIRCUIT
RANGE/PERFORMANCE (58X) ...................... 6E-234
DTC P0337 (FLASH CODE 29) CRANKSHAFT
POSITION SENSOR CIRCUIT NO SIGNAL
(58X) ................................................................. 6E-234
DTC P0341 (FLASH CODE 41) CAMSHAFT
POSITION SENSOR CIRCUIT
RANGE/PERFORMANCE ............................... 6E-243
DTC P0342 (FLASH CODE 41) CAMSHAFT
POSITION SENSOR CIRCUIT NO SIGNAL .... 6E-243
DTC P0351 (FLASH CODE 42) IGNITION 1
CONTROL CIRCUIT ........................................ 6E-249
DTC P0352 (FLASH CODE 42) IGNITION 2
CONTROL CIRCUIT ........................................ 6E-249
DTC P0353 (FLASH CODE 42) IGNITION 3
CONTROL CIRCUIT ........................................ 6E-249
DTC P0354 (FLASH CODE 42) IGNITION 4
CONTROL CIRCUIT ........................................ 6E-249
DTC P0355 (FLASH CODE 42) IGNITION 5
CONTROL CIRCUIT ........................................ 6E-249
DTC P0356 (FLASH CODE 42) IGNITION 6
CONTROL CIRCUIT ........................................ 6E-249
DTC P0404 (FLASH CODE 32) EGR CIRCUIT
RANGE/PERFORMANCE (OPEN VALVE)....... 6E-258
DTC P1404 (FLASH CODE 32) EGR CIRCUIT
RANGE/PERFORMANCE (CLOSED VALVE) .. 6E-258
DTC P0405 (FLASH CODE 32) EGR
CIRCUIT LOW.................................................. 6E-263
DTC P0406 (FLASH CODE 32) EGR
CIRCUIT HIGH ................................................. 6E-268
DTC P0444 EVAP PURGE SOLENOID
VALVE CIRCUIT LOW VOLTAGE ................... 6E-274
DTC P0445 EVAP PURGE SOLENOID
VALVE CIRCUIT HIGH VOLTAGE .................. 6E-274
DTC P0500 (FLASH CODE 24) VEHICLE
SPEED SENSOR (VSS) CIRCUIT
RANGE/PERFORMANCE ................................ 6E-279 DTC P0562 (FLASH CODE 66) SYSTEM
VOLTAGE LOW .............................................. 6E-288
DTC P0563 (FLASH CODE 66) SYSTEM
VOLTAGE HIGH .............................................. 6E-321
DTC P0601 (FLASH CODE 51) ENGINE
CONTROL MODULE (ECM) MEMORY
CHECKSUM ..................................................... 6E-293
DTC P0602 PROGRAMMING ERROR............. 6E-295
DTC P1508 (FLASH CODE 22) IDLE AIR
CONTROL SYSTEM LOW/CLOSED ............... 6E-296
DTC P1509 (FLASH CODE 22) IDLE AIR
CONTROL SYSTEM HIGH/OPEN ................... 6E-296
DTC P1601 (FLASH CODE 65) CAN BUS
OFF .................................................................. 6E-304
DTC U2104 (FLASH CODE 67) CAN BUS
RESET COUNTER OVER-RUN ...................... 6E-310
DTC P1626 IMMOBILIZER NO SIGNAL ........... 6E-317
DTC P1631 IMMOBILIZER WRONG
SIGNAL ............................................................ 6E-323
DTC P1648 IMMOBILIZER WRONG
SECURITY CODE ENTERED .......................... 6E-325
DTC P1649 IMMOBILIZER FUNCTION NOT
PROGRAMMED ................................................ 6E-327
SYMPTOM DIAGNOSIS ................................... 6E-329
PRELIMINARY CHECKS .............................. 6E-329
VISUAL/PHYSICAL CHECK .......................... 6E-329
INTERMITTENT ............................................. 6E-329
ENGINE CRANKS BUT WILL NOT RUN ......... 6E-331
HARD START SYMPTOM ................................ 6E-334
ROUGH, UNSTABLE, OR INCORRECT
IDLE, STALLING SYMPTOM ........................... 6E-337
SURGES AND/OR CHUGS SYMPTOM ........... 6E-341
HESITATION, SAG, STUMBLE SYMPTOM ..... 6E-345
CUTS OUT, MISSES SYMPTOM ..................... 6E-347
LACK OF POWER, SLUGGISH OR SPONGY
SYMPTOM ....................................................... 6E-352
DETONATION/SPARK KNOCK SYMPTOM..... 6E-356
POOR FUEL ECONOMY SYMPTOM ............... 6E-359
EXCESSIVE EXHAUST EMISSIONS OR
ODORS SYMPTOM ......................................... 6E-362
DIESELING, RUN-ON SYMPTOM .................... 6E-365
BACKFIRE SYMPTOM ..................................... 6E-366
ON-VEHICLE SERVICE PROCEDURE ........... 6E-368
ENGINE CONTROL MODULE (ECM) .............. 6E-368
CRANKSHAFT POSITION (CKP) SENSOR ..... 6E-369
CAMSHAFT POSITION (CMP) SENSOR ......... 6E-369
ENGINE COOLANT TEMPERATURE (ECT)
SENSOR .......................................................... 6E-370
MASS AIR FLOW (MAF) SENSOR & INTAKE AIR
TEMPERATURE (IAT) SENSOR ...................... 6E-370

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-5
ABBREVIATION CHARTS

Abbreviations Appellation
A/C Air conditioner
A/T Automatic transmission
ACC Accessory
BLK Black
BLU Blue
BRN Brown
CAN Controller Area Network
CEL Check engine lamp
CKP Crankshaft position
CMP Camshaft position
DLC Data link connector
DTC Diagnosis trouble code
DVM Digital voltage meter
ECM Engine control module
ECT Engine coolant temperature
EEPROM Electrically erasable & programmable read only memory
EGR Exhaust gas recalculation
GND Ground
GRY Gray
HO2S Heated Oxygen Sensor
IAT Intake air temperature
IAC Idle air control
IG Ignition
M/T Manual transmission
MAF Mass air flow
MIL Malfunction indicator lamp
OBD On-board diagnostic
ORN Orange
PNK Pink
PROM Programmable read only memory
RED Red
SW Switch
TPS Throttle position sensor
TCM Transmission control module
VCC Voltage Constant Control
VIO Violet
VSS Vehicle speed sensor
WHT White
WOT Wide open throttle
YEL Yellow

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-27
CONNECTOR LIST
No. Connector face No. Connector face
B-24
Green
Meter-B C-108
WhiteJ/B E1
B-56
White
J/B I4 C-109
SilverBody-LH ; ground
B-58
Black
Check connector E-2
Magnetic clutch
B-62
White
Ignition switch (IGSUB : G1) E-6

Fuel injector
B-63
White
Ignition switch (IGSUB : G2) E-7

Fuel injector
B-68


Immobilizer E-8

Fuel injector
C-2
Silver
Engine room-RH ground E-9

Fuel injector
C-24

Triple pressure switch E-51

Fuel injector
C-94

Gray TCM-(A) E-52

Fuel injector
C-107
White
J/B E2 E-53

Ignition coil

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-47
Signal or Continuity Tester Position Pin
No. B/Box
No. Pin Function Wire
Color
Key SW Off Key SW On Engine IdleEngine
2000rpm ECM
Connection Range (+) (-)
B16 B16 Idle Air Control
(IAC) Valve
Coil A Low BLU/
RED Less than 1V Less than 1V / 10-14V Connect DC V B16 GND
B17 B17 Idle Air Control
(IAC) Valve
Coil B Low BLU/
BLKLess than 1V Less than 1V / 10-14V Connect DC V B17 GND
B18 B18 Check Engine
Lamp
(Immobilizer
Control Unit
Terminal B7) BRN/
YELLess than 1V Less than 1VLamp is turned on:
Less than 1V
Lamp is turned off: 10-14VConnect DC V B18 GND
B19 B19 Fuel Pump
Relay GRN/
WHT Less than 1V While relay is
activated:
10-14V
Relay is not
activated:
Less than 1V10-14V Connect DC V B19 GND
B20 B20 Mass Air Flow
(MAF) Sensor BLK/
YELLess than 1V Approx. 0.47VApprox. 1.5V
at 750 rpmApprox. 2V Connect DC V B20 GND
B21 B21 Bank 1 Oxygen
Sensor Signal PNK Less than 1V Approx. 0.4V 0.1 - 0.9V Connect DC V B21 B22
B22 B22 Bank 1 Oxygen
Sensor Ground BLU/
YELContinuity
with ground - - - Connect Ohm B22 GND
B23 B23 Bank 2 Oxygen
Sensor Signal RED Less than 1V Approx. 0.4V 0.1 - 0.9V Connect DC V B23 B24
B24 B24 Bank 2 Oxygen
Sensor Ground BLU/
BLKContinuity
with ground - - - Connect Ohm B24 GND
B25 B25 To Data Link
Connector
No.6 BLK/
GRN - - - - - - - -
B26 B26 Throttle
Position
Sensor (TPS)
Signal BLU Less than 1V Approx. 0.5V Approx. 0.6V Connect DC V B26 B39
B27 B27 TPS & Cam
Position
Sensor +5V
Supply GRN Less than 1V Approx. 5V Connect DC V B27 B39
B28 B28 Camshaft
Position (CMP)
Sensor Signal BLU - - Wave form - - - -
B29 B29 Inhibitor Switch
(AT Only) BLK Less than 1V P or N range: Less than 1V
Other than P or N range: 10-14V Connect DC V B29 GND
B30 B30 Power Steering
Pressure
Switch GRN/
YELLess than 1V Pressure switch is turned on: Less than 1V
Pressure Switch is turned off: 10-14V Connect DC V B30 GND
B31 B31 A/C Thermo
Relay GRN/
BLKLess than 1V A/C request is activated: 10-14V
A/C request is not activated: Less than 1VConnect DC V B31 GND

3.5L ENGINE DRIVEABILITY AND EMISSIONS 6E-51

GENERAL DESCRIPTION FOR ECM AND
SENSORS
Engine Control Module (ECM)


1 2
(1) A Port
(2) B Port


The engine control module (ECM) is located on the
common chamber. The ECM controls the following.

Fuel metering system

Ignition timing

On-board diagnostics for powertrain functions.

The ECM constantly observes the information from
various sensors. The ECM controls the systems tha
t
affect vehicle performance. And it performs the
diagnostic function of the system.
The function can recognize operational problems, and
warn to the driver through the check engine lamp, and
store diagnostic trouble code (DTC). DTCs identify the
problem areas to aid the technician in marking repairs.

The input / output devices in the ECM include analog to
digital converts, signal buffers, counters and drivers.
The ECM controls most components with electronic
switches which complete a ground circuit when turned
on.

Inputs (Operating condition read):

Battery voltage

Electrical ignition

Exhaust oxygen content

Mass air flow

Intake air temperature

Engine coolant temperature

Crankshaft position

Camshaft position

Throttle position

Vehicle speed

Power steering pressure

Air conditioning request on or off

EGR valve position

Outputs (Systems controlled):

Ignition control

Fuel control

Idle air control

Fuel pump

EVAP canister purge

Air conditioning

Diagnostics functions

The vehicle with automatic transmission, the
interchange of data between the engine control module
(ECM) and the transmission control module (TCM) is
performed via a CAN-bus system.
The following signals are exchanged via the CAN-bus:

ECM to TCM:

ECM CAN signal status

Engine torque

Coolant temperature

Throttle position

Engine speed

A/C status

CAN valid counter

TCM to ECM:

Ignition timing retard request

Garage shift status

CAN valid counter