2004 ISUZU TF SERIES ignition

ELECTRICAL-BODY AND CHASSIS 8A-429


No. Connector face No. Connector face
E-23
(4JH1-TC)
Gray TPS 2 main E-44
Gray Vehicle speed sensor
E-24
~
E-29 NOT USED E-45
(4JH1-TC)
Gray 2WD-4WD switch
E-30
(4JH1-TC)
Gray A/T speed sensor E-46
(4JH1-TC)
BrownH-L neutral switch
E-31
(4JH1-TC)
Gray Turbine sensor E-47
~
E-48 NOT USED
E-32
~
E-34 NOT USED E-49
(4JH1-TC)
Glow plug
E-35
(4JH1-TC)
(C24SE)
Black Motor actuator E-50

NOT USED
E-36
~
E-40 NOT USED E-51
(6VE1)
Fuel injector
E-41
(4JH1-TC)
Black Coolant temp sensor E-51
(4JH1-TC)
BlackInhibiter switch
E-42
Natural
green
Backup lamp switch E-52
(6VE1)
Fuel injector
E-43
Natural
green
Backup lamp switch E-53
(6VE1)
Ignition coil

8A-430 ELECTRICAL-BODY AND CHASSIS


No. Connector face No. Connector face
E-54
(6VE1)
Ignition coil E-62
(6VE1)
Cam position sensor
E-54
(4JH1-TC)
Black A/T term ASM E-64
(C24SE)
(6VE1)
Oil pressure switch (P/STRG)
E-55
(6VE1)
Ignition coil E-65
(C24SE)
(6VE1)
Thermo unit
E-56
(6VE1)
Ignition coil E-66
(C24SE)
(6VE1)
Duty solenoid
E-57
(6VE1)
Ignition coil E-67
NOT USED
E-58
(6VE1)
Ignition coil E-68
(C24SE)
Throttle position sensor
E-59
(C24SE)
(6VE1)
(6VE1) Crank position sensor (C24SE) E-68
(6VE1)
Throttle position sensor
E-60
(C24SE)
ECM E-69
(6VE1)
Temperature sensor
E-60
(6VE1)
ECM-A E-70
(C24SE)
IACV
E-61
(6VE1)
ECM-B E-70
(6VE1)
IACV

8B-10 CRUISE CONTROL SYSTEM
Diagnosis
The cruise control unit uses the cruise main indicator light and diagnosis the failure, when the control unit detects
abnormality on the table below.

PART POSSIBLE CAUSE DETECTION PERIOD DTC
Actuator Motor system short circuit Energizing motor 1-1
Clutch system short circuit Energizing clutch 1-2
Clutch system open circuit Energizing clutch 1-2
Mechanical defect Cruise controlling 1-3
Close side of motor system open circuit Cruise controlling 1-1
Cruise control unit Close side of motor system open circuit While starter sw on 1-4
Clutch output abnormality While starter sw on 1-4
Vehicle speed sensor Signal of vehicle speed disconnection Cruise controlling 2-1
Signal of vehicle speed abnormality Cruise controlling 2-1
Switch Turning on switch at all times While starter sw on 3-1
Turning on switch at the same time While starter sw on 3-1
DTC : Diagnostic Trouble Code

DTC Display Condition
1. With the vehicle stationary and the ignition ON, activate the ‘Cruise Cancel’ switch three times within 2 seconds.
2. If there are no DTC’s stored in the Cruise control unit, the LED on the Cruise Main switch will blink rapidly (2Hz).
3. Any DTC’s stored in the Cruise control unit will be displayed by the CRUISE SET warning lamp in the meter
cluster.
4. Read the set DTC’s by referring to then charts on this page.

NOTE:

The DTC display mode will be aborted if either the vehicle speed rises above 10km/h or the RESUME switch is
operated.

The control module stores the DTC in a ‘volatile’ memory – that is the memory is only active while the ignition is
ON.
Turning the ignition to the OFF position will clesr any stored DTC’s.

6A – 26 ENGINE MECHANICAL



041RY00011
Draining Procedure
The indicator light will come on when the water level in the
water separator exceeds the specified level.
Drain the water and foreign material from the water
separator (inside chassis frame) with the following
procedure.





1. Place the drain pan under the drain plug.
2. Loosen the drain plug and drain water.
3. After draining the water, tighten the drain plug.
4. Operate the priming pump on the fuel filter several
times and check for fuel leakage.
5. Check the water separator indicator light. It should be
off.



Except EURO III model
RTW46ASH002901




For EURO III model
RTW46ASH000501


Air Bleeding
1. Operate the priming pump until strong resistance is
felt.
2. Wait 1 minute, and operate the priming pump until
strong resistance is felt.
3. Once more wait, and operate the priming pump until
strong resistance is felt.
4. Turn the ignition switch to the "ON" position. Wait until
the glow indicator lamp turns off.
5. Turn the ignition switch to the "START" position and
crank the engine until it starts.
6. If the engine does not start, repeat Step 3 - 5.
7. Allow the engine to idle for 3 minutes to bleed air
completely form the fuel system and check for fuel
leakage.
Note:
Insufficient air bleeding may cause the Diagnostic
Trouble Code (DTC) store or improper engine
performance.

4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–5
DIAGNOSTIC TROUBLE CODE (DTC) P0400
(SYMPTOM CODE 8) (FLASH CODE 32)
EXHAUST GAS RECIRCULATION CIRCUIT
SHORT TO BATTERY ............................ 6E-227
Circuit Description ..................................... 6E-228
Diagnostic Aids .......................................... 6E-228
Diagnostic Trouble Code (DTC) P0400
(Symptom Code 3) (Flash Code 32) Ex haust
Gas Recirculation Flow Ex cessive Detected 6E-228
Diagnostic Trouble Code (DTC) P0400
(Symptom Code 4) (Flash Code 32) Ex haust
Gas Recirculation Circuit Short to Ground or
Open Circuit ............................................. 6E-232
Diagnostic Trouble Code (DTC) P0400
(Symptom Code 5) (Flash Code 32) Ex haust
Gas Recirculation Flow Insufficient Detected 6E-235
Diagnostic Trouble Code (DTC) P0400
(Symptom Code 8) (Flash Code 32) Ex haust
Gas Recirculation Circuit Short to Battery 6E-238
DIAGNOSTIC TROUBLE CODE (DTC) P0500
(SYMPTOM CODE 1) (FLASH CODE 24)
VEHICLE SPEED SENSOR CIRCUIT HIGH
INPUT ...................................................... 6E-240
DIAGNOSTIC TROUBLE CODE (DTC) P0500
(SYMPTOM CODE A) (FLASH CODE 24)
VEHICLE SPEED SENSOR INPUT SIGNAL
FREQUENCY TOO HIGH ....................... 6E-240
DIAGNOSTIC TROUBLE CODE (DTC) P0500
(SYMPTOM CODE B) (FLASH CODE 24)
VEHICLE SPEED SENSOR INCORRECT
SIGNAL ................................................... 6E-240
Circuit Description ..................................... 6E-241
Diagnostic Aids .......................................... 6E-241
Diagnostic Trouble Code (DTC) P0500
(Symptom Code 1) (Flash Code 24) Vehicle
Speed Sensor Circuit High Input ............. 6E-241
Diagnostic Trouble Code (DTC) P0500
(Symptom Code A) (Flash Code 24)
Vehicle Speed Sensor Input Signal
Frequency Too High ................................ 6E-245
Diagnostic Trouble Code (DTC) P0500
(Symptom Code B) (Flash Code 24)
VehicleSpeed Sensor Incorrect Signal .... 6E-248
DIAGNOSTIC TROUBLE CODE (DTC) P0560
(SYMPTOM CODE 1) (FLASH CODE 35)
SYSTEM VOLTAGE TOO HIGH ............. 6E-253
DIAGNOSTIC TROUBLE CODE (DTC) P0560
(SYMPTOM CODE 2) (FLASH CODE 35)
SYSTEM VOLTAGE TOO LOW .............. 6E-253
DIAGNOSTIC TROUBLE CODE (DTC) P0560
(SYMPTOM CODE A) (FLASH CODE 35)
SYSTEM VOLTAGE MALFUNCTION ..... 6E-253
Circuit Description ..................................... 6E-253Diagnostic Aids .......................................... 6E-254
Diagnostic Trouble Code (DTC) P0560
(Symptom Code 1) (Flash Code 35)
System Voltage Too High ........................ 6E-254
Diagnostic Trouble Code (DTC) P0560
(Symptom Code 2) (Flash Code 35)
System Voltage Too Low ......................... 6E-256
Diagnostic Trouble Code (DTC) P0560
(Symptom Code A) (Flash Code 35)
System Voltage Malfunction .................... 6E-258
DIAGNOSTIC TROUBLE CODE (DTC) P0561
(SYMPTOM CODE A) (FLASH CODE 18)
IGNITION SWITCH CIRCUIT
MALFUNCTION ....................................... 6E-260
DIAGNOSTIC TROUBLE CODE (DTC) P0561
(SYMPTOM CODE B) (FLASH CODE 18)
IGNITION SWITCH CIRCUIT
MALFUNCTION ....................................... 6E-260
Circuit Description ...................................... 6E-261
Diagnostic Aids .......................................... 6E-261
Diagnostic Trouble Code (DTC) P0561
(Symptom Code A) (Flash Code 18)
Ignition Switch Circuit Malfunction ........... 6E-261
Diagnostic Trouble Code (DTC) P0561
(Symptom Code B) (Flash Code 18)
Ignition Switch Circuit Malfunction ........... 6E-261
DIAGNOSTIC TROUBLE CODE (DTC) P0602
CONTROL MODULE PROGRAMMING
ERROR .................................................... 6E-264
Circuit Description & Diagnostic Aids ........ 6E-264
Diagnostic Trouble Code (DTC) P0602
Control Module Programming Error ......... 6E-264
DIAGNOSTIC TROUBLE CODE (DTC) P0606
(SYMPTOM CODE A) (FLASH CODE 28)
ECU MALFUNCTION .............................. 6E-265
DIAGNOSTIC TROUBLE CODE (DTC) P0606
(SYMPTOM CODE B) (FLASH CODE 28)
ECU MALFUNCTION .............................. 6E-265
Circuit Description & Diagnostic Aids ........ 6E-265
Diagnostic Trouble Code (DTC) P0606
(Symptom Code A) (Flash Code 28)
ECU Malfunction ...................................... 6E-265
Diagnostic Trouble Code (DTC) P0606
(Symptom Code B) (Flash Code 28)
ECU Malfunction ...................................... 6E-267
DIAGNOSTIC TROUBLE CODE (DTC) P0645
(SYMPTOM CODE 4) (FLASH CODE 46)
A/C COMPRESSOR RELAY CIRCUIT
VOLTAGE LOW ...................................... 6E-268
DIAGNOSTIC TROUBLE CODE (DTC) P0645
(SYMPTOM CODE 8) (FLASH CODE 46)
A/C COMPRESSOR RELAY CIRCUIT
VOLTAGE HIGH ...................................... 6E-268

4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS 6E–9
ABBREVIATION CHARTS
A bbreviations A ppellation
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 sensor
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 Ex haust gas recirculation
EVRV Electric vacuum regulating valve
GND Ground
GRY Gray
IAT Intake air temperature
IG Ignition
M/T Manual transmission
MAB High pressure solenoid valve cutoff (German abbreviation)
MAF Mass air flow
MIL Malfunction indicator lamp
OBD On-board diagnostic
ORN Orange
PNK Pink
RED Red
PSG Pump control unit (German abbreviation)
SW Switch
TCM Transmission control module
TCV Timing control valve
TDC Top dead center
TPS Throttle position sensor
VCC Voltage constunt control
VIO Violet
VSS Vehicle speed sensor
WHT Whi te
YEL Yellow

6E–40 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
CONNECTOR LIST
No. Connector face No. Connector face
B-24
Green Meter-BC-56
ECM-A
B-54
White J/B I2C-57
ECM-B
B-56
White J/B I4C-77
Clutch switch
B-58
Black Check connectorC-94
White TCM
B-62
White Ignition switch (IGSUB : G1)C-95
White TCM
B-63
White Ignition switch (IGSUB : G2)C-107
White J/B E2
B-68
ImmobilizerC-108
White J/B E1
C-2
Silver Engine room-RH groundC-109
Silver Body-LH ; ground
C-36
Silver Engine room-LH ; GroundC-115
Brown EVRV
C-44
White Stop lamp switchC-116

6E–82 4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
GENERAL SERVICE INFORMATION
Serviceability Issues
Non-OEM Parts
All of the OBD diagnostics have been calibrated to run
with OEM parts. Accordingly, if commercially sold
sensor or switch is installed, it makes a wrong diagnosis
and turns on the check engine lamp.
Aftermarket electronics, such as cellular phones,
stereos, and anti-theft devices, may radiate EMI into the
control system if they are improperly installed. This may
cause a false sensor reading and turn on the check
engine lamp.
Poor Vehicle Maintenance
The sensitivity of OBD diagnostics will cause the check
engine lamp to turn on if the vehicle is not maintained
properly. Restricted oil filters, fuel filters, and crankcase
deposits due to lack of oil changes or improper oil
viscosity can trigger actual vehicle faults that were not
previously monitored prior to OBD. Poor vehicle
maintenance can not be classified as a “non-vehicle
fault”, but with the sensitivity of OBD diagnostics,
vehicle maintenance schedules must be more closely
followed.
Related System Faults
Many of the OBD system diagnostics will not run if the
ECM detects a fault on a related system or component.
Visual/Physical Engine Compartment
Inspection
Perform a careful visual and physical engine
compartment inspection when performing any
diagnostic procedure or diagnosing the cause of an
emission test failure. This can often lead to repairing a
problem without further steps. Use the following
guidelines when performing a visual/physical
inspection:
Inspect all vacuum hoses for punches, cuts,
disconnects, and correct routing.
Inspect hoses that are difficult to see behind other
components.
Inspect all wires in the engine compartment for
proper connections, burned or chafed spots, pinched
wires, contact with sharp edges or contact with hot
exhaust manifolds or pipes.
Basic Knowledge of Tools Required
NOTE: Lack of basic knowledge of this powertrain
when performing diagnostic procedures could result in
an incorrect diagnosis or damage to powertrain
components. Do not attempt to diagnose a powertrain
problem without this basic knowledge.
A basic understanding of hand tools is necessary to
effectively use this section of the Service Manual.
ON-BOARD DIAGNOSTIC (OBD)
On-Board Diagnostic (Self Diagnosis
System) Tests
A diagnostic test is a series of steps, the result of which
is a pass or fail reported to the diagnostic ex ecutive.
When a diagnostic test reports a pass result, the
diagnostic ex ecutive records the following data:
The diagnostic test has been completed since the
last ignition cycle.
The diagnostic test has passed during the current
ignition cycle.
The fault identified by the diagnostic test is not
currently active.
When a diagnostic test reports a fail result, the
diagnostic ex ecutive records the following data:
The diagnostic test has been completed since the
last ignition cycle.
The fault identified by the diagnostic test is currently
active.
The fault has been active during this ignition cycle.
The operating conditions at the time of the failure.
The Diagnostic Executive
The Diagnostic Executive is a unique segment of
software which is designed to coordinate and prioritize
the diagnostic procedures as well as define the protocol
for recording and displaying their results. The main
responsibilities of the Diagnostic Ex ecutive are listed as
follow s:
Commanding the check engine lamp on and off
DTC logging and clearing
Current status information on each diagnostic
Diagnostic Information
The diagnostic charts and functional checks are
designed to locate a faulty circuit or component through
a process of logical decisions. The charts are prepared
with the requirement that the vehicle functioned
correctly at the time of assembly and that there are not
multiple faults present.
There is a continuous self-diagnosis on certain control
functions. This diagnostic capability is complemented
by the diagnostic procedures contained in this manual.
The language of communicating the source of the
malfunction is a system of diagnostic trouble codes.
When a malfunction is detected by the control module, a
diagnostic trouble code is set and the check engine
lamp is illuminated.
Check Engine Lamp
The check engine lamp looks the same as the check
engine lamp you are already familiar with, the “Check
Engine” lamp.
Basically, the check engine lamp is turned on when the