2004 ISUZU TF SERIES injector

ENGINE FUEL (C24SE) 6C-7
Fuel Pump Flow Test
If reduction of fuel supply is suspected, perform the
following checks.
1. Make sure that there is fuel in the tank.
2. With the engine running, check the fuel feed pipe
and hose from fuel tank to injector for evidence o
f
leakage. Retighten, if pipe or hose connection is
loose. Also, check pipes and hoses for squashing
or clogging.
3. Insert the hose from fuel feed pipe into a clean
container, and check for fuel pump flow rate.
4. Connect the pump relay terminals (2) with a
jumper wire (1) as shown and start the fuel pump
to measure delivery.




RTW36CSH000201
CAUTION: Never generate sparks when connecting
a jumper wire.

Delivery Delivery
15 seconds 0.38 liters minimum
If the measure value is out of standard, conduct the
pressure test.
Pressure test
For the pressure test to the fuel system, see Section 6E
“Fuel Control System".

ENGINE DRIVEABILITY AND EMISSIONS 6E–1
ENGINE
CONTENTS
C24SE ENGINE DRIVEABILITY AND EMISSIONS
ABBREVIATIONS CHARTS ......................... 6E-6
ECM Circuit Diagram (1/2) ............................ 6E-11
ECM Circuit Diagram (2/2) ............................ 6E-12
GROUND POINT CHART - LHD G.EXP (1/4) 6E-13
GROUND POINT CHART - RHD G.EXP (1/4) 6E-17
LOCATION ................................................... 6E-21
CABLE HARNESS & CONNECTOR
LOCATION .............................................. 6E-23
CABLE HARNESS & CONNECTOR
LOCATION
LHD ................................... 6E-24
CABLE HARNESS & CONNECTOR
LOCATION
RHD ................................... 6E-25
CONNECTOR LIST ...................................... 6E-28
RELAY AND FUSE ....................................... 6E-30
RELAY AND FUSE BOX LOCATION
(LHD & RHD) ........................................... 6E-30
FUSE AND RELAY LOCATION (LHD & RHD) 6E-32
ECM WIRING DIAGRAM (1/9) ..................... 6E-33
ECM WIRING DIAGRAM (2/9) ..................... 6E-34
ECM WIRING DIAGRAM (3/9) ..................... 6E-35
ECM WIRING DIAGRAM (4/9) ..................... 6E-36
ECM WIRING DIAGRAM (5/9) ..................... 6E-37
ECM WIRING DIAGRAM (6/9) ..................... 6E-38
ECM WIRING DIAGRAM (7/9) ..................... 6E-39
ECM WIRING DIAGRAM (8/9) ..................... 6E-40
ECM WIRING DIAGRAM (9/9) ..................... 6E-41
ECM CONNECTOR PIN ASSIGNMENT &
OUTPUT SIGNAL .................................... 6E-42
GENERAL DESCRIPTION FOR ECM AND
SENSORS ............................................... 6E-48
Engine Control Module (ECM) ................... 6E-48
Manifold Absolute Pressure (MAP) Sensor 6E-48
Throttle Position Sensor (TPS) .................. 6E-49
Idle Air Control (IAC) Valve ....................... 6E-49
Crankshaft Position (CKP) Sensor ............ 6E-50
Knock Sensor (KS) .................................... 6E-50
Engine Coolant Temperature (ECT) Sensor 6E-50
Intake Air Temperature (IAT) Sensor ........ 6E-51
Vehicle Speed Sensor (VSS) .................... 6E-51
Heated Ox ygen (O
2) Sensor ..................... 6E-51
GENERAL DESCRIPTION FOR FUEL
METERING .............................................. 6E-52Battery Voltage Correction Mode ............... 6E-52
Clear Flood Mode ...................................... 6E-52
Deceleration Fuel Cutoff (DFCO) Mode .... 6E-52
Engine Speed/ Vehicle Speed/ Fuel Disable
Mode ........................................................ 6E-52
Acceleration Mode ..................................... 6E-52
Fuel Cutoff Mode ....................................... 6E-52
Starting Mode ............................................ 6E-52
Run Mode .................................................. 6E-52
Fuel Metering System Components .......... 6E-53
Fuel Injector ............................................... 6E-53
Fuel Pressure Regulator ............................ 6E-53
Fuel Rail ..................................................... 6E-53
Fuel Pump Electrical Circuit ....................... 6E-53
Thottle Body Unit ....................................... 6E-53
GENERAL DESCRIPTION FOR ELECTRIC
IGNITION SYSTEM ................................. 6E-54
Spark Plug ................................................. 6E-54
GENERAL DESCRIPTION FOR EVAPORATIVE
EMISSION SYSTEM ............................... 6E-57
EVAP Emission Control System Purpose .. 6E-57
EVAP Emission Control System Operation 6E-57
System Fault Detection .............................. 6E-57
POSITIVE CRANKCASE VENTILATION (PCV)
SYSTEM .................................................. 6E-59
Crankcase Ventilation System Purpose .... 6E-59
A/C CLUTCH DIAGNOSIS ........................ 6E-60
A/C Clutch Circuit Operation ...................... 6E-60
A/C Clutch Circuit Purpose ........................ 6E-60
A/C Request Signal ................................... 6E-60
ISUZU STRATEGY BASED DIAGNOSTICS 6E-61
Overview .................................................... 6E-61
STRATEGY BASED DIAGNOSTICS CHART 6E-61
Diagnostic Thought Process ...................... 6E-62
1. Verify the Complaint .............................. 6E-62
2. Perform Preliminary Checks .................. 6E-62
3. Check Bulletins and Troubleshooting Hints 6E-63
4. Perform Service Manual Diagnostic Checks 6E-63
5a and 5b. Perform Service Manual Diagnostic
Procedures .............................................. 6E-63
5c. Technician Self Diagnoses .................. 6E-63
5d. Intermittent Diagnosis .......................... 6E-64

6E–2 ENGINE DRIVEABILITY AND EMISSIONS
5e. Vehicle Operates as Designed ............ 6E-65
6. Re-examine the complaint ..................... 6E-66
7. Repair and Verify Fix ............................. 6E-66
GENERAL SERVICE INFORMATION .......... 6E-67
On-Board Diagnostic (OBD) ...................... 6E-68
On-Board Diagnostic Tests ....................... 6E-68
The Diagnostic Executive .......................... 6E-68
Diagnostic Information ............................... 6E-68
Check Engine Lamp .................................. 6E-68
Data Link Connector (DLC) ....................... 6E-68
Tech 2 Operating Flow Cart (Start Up) ...... 6E-70
TYPICAL SCAN DATA & DEFINITIONS
(ENGINE DATA) ......................................... 6E-72
TYPICAL SCAN DATA & DEFINITIONS
(O2 SENSOR DATA) .................................. 6E-74
MISCELLANEOUS TEST ............................. 6E-76
PLOTTING SNAPSHOT GRAPH ................. 6E-78
Plotting Graph Flow Chart (Plotting graph after
obtaining vehicle information) .................. 6E-79
Flow Chart for Snapshot Replay
(Plotting Graph) ....................................... 6E-80
SNAPSHOT DISPLAY WITH TIS2000 ......... 6E-81
ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK
6E-98
Circuit Description ......................................... 6E-90
Diagnostic Aids ............................................. 6E-90
Test Description ............................................ 6E-90
ON-BOARD DIAGNOSTIC (OBD) SYSTEM
CHECK .................................................... 6E-91
NO CHECK ENGINE LAMP (MIL) ................ 6E-94
Circuit Description ..................................... 6E-94
Diagnostic Aids .......................................... 6E-94
No Check Engine Lamp (MIL) ................... 6E-94
CHECK ENGINE LAMP (MIL) “ON” STEADY 6E-96
Circuit description ...................................... 6E-96
Diagnostic Aids .......................................... 6E-96
Check Engine Lamp (MIL) “ON” Steady .... 6E-96
FUEL METERING SYSTEM CHECK ........... 6E-98
FUEL INJECTOR COIL TEST PROCEDURE
AND FUEL INJECTOR BALANCE TEST
PROCEDURE ............................................. 6E-98
Test Description ......................................... 6E-98
Injector Coil Test Procedure (Steps 1-6)
and Injector Balance Test Procedure
(Steps 7-11) ............................................. 6E-99
Injector Coil Test Procedure (Steps 1-6)
and Injector Balance Test Procedure
(Steps 7-11) ............................................. 6E-100
FUEL SYSTEM ELECTRICAL TEST ........... 6E-103
Circuit Description ..................................... 6E-103
Diagnostic Aids .......................................... 6E-104Fuel Pressure Relief Procedure ................. 6E-104
Fuel Pressure Gauge Installation .............. 6E-104
Fuel System Electrical Test ....................... 6E-104
FUEL SYSTEM DIAGNOSIS ........................ 6E-108
Circuit Description ...................................... 6E-108
Test Description ......................................... 6E-108
Fuel Pressure Relief Procedure ................. 6E-109
Fuel Pressure Gauge Installation .............. 6E-109
Fuel System Diagnosis .............................. 6E-110
ECM DIAGNOSTIC TROUBLE CODES (DTC) 6E-113
DIAGNOSTIC TROUBLE CODE (DTC) P0107
MANIFOLD ABSOLUTE PRESSURE
CIRCUIT LOW INPUT ................................ 6E-119
Circuit Description ...................................... 6E-119
Diagnostic Aids .......................................... 6E-119
Diagnostic Trouble Code (DTC) P0107
Manifold Absolute Pressure Circuit Low
Input ......................................................... 6E-120
DIAGNOSTIC TROUBLE CODE (DTC) P0108
MANIFOLD ABSOLUTE PRESSURE
CIRCUIT HIGH INPUT ............................... 6E-123
Circuit Description ...................................... 6E-123
Diagnostic Aids .......................................... 6E-124
Diagnostic Trouble Code (DTC) P0108
Manifold Absolute Pressure Circuit High
Input ......................................................... 6E-124
DIAGNOSTIC TROUBLE CODE (DTC) P0112
INTAKE AIR TEMPERATURE SENSOR LOW
INPUT ......................................................... 6E-127
Circuit Description ...................................... 6E-127
Diagnostic Aids .......................................... 6E-127
Diagnostic Trouble Code (DTC) P0112
Intake Air Temperature Sensor Low Input 6E-128
DIAGNOSTIC TROUBLE CODE (DTC) P0113
INTAKE AIR TEMPERATURE SENSOR HIGH
INPUT ......................................................... 6E-131
Circuit Description ...................................... 6E-131
Diagnostic Aids .......................................... 6E-131
Diagnostic Trouble Code (DTC) P0113
Intake Air Temperature Sensor High Input 6E-132
DIAGNOSTIC TROUBLE CODE (DTC) P0117
ENGINE COOLANT TEMPERATURE
SENSOR LOW INPUT ................................ 6E-136
Circuit Description ...................................... 6E-136
Diagnostic Aids .......................................... 6E-136
Diagnostic Trouble Code (DTC) P0117
Engine Coolant Temperature Sensor Low
Input ......................................................... 6E-137
DIAGNOSTIC TROUBLE CODE (DTC) P0118
ENGINE COOLANT TEMPERATURE
SENSOR HIGH INPUT ............................... 6E-139
Circuit Description ...................................... 6E-139

ENGINE DRIVEABILITY AND EMISSIONS 6E–3
Diagnostic Aids .......................................... 6E-139
Diagnostic Trouble Code (DTC) P0118
Engine Coolant Temperature Sensor High
Input ......................................................... 6E-140
DIAGNOSTIC TROUBLE CODE (DTC) P0122
THROTTLE POSITION SENSOR LOW
INPUT ......................................................... 6E-143
Circuit Description ..................................... 6E-143
Diagnostic Aids .......................................... 6E-143
Diagnostic Trouble Code (DTC) P0122 Throttle
Position Sensor Low Input ....................... 6E-144
DIAGNOSTIC TROUBLE CODE (DTC) P0123
THROTTLE POSITION SENSOR HIGH
INPUT ...................................................... 6E-147
Circuit Description ..................................... 6E-147
Diagnostic Aids .......................................... 6E-147
Diagnostic Trouble Code (DTC) P0123 Throttle
Position Sensor High Input ...................... 6E-148
DIAGNOSTIC TROUBLE CODE (DTC) P0131
O
2 SENSOR CIRCUIT LOW VOLTAGE
(BANK 1 SENSOR 1) ................................. 6E-150
Circuit Description ..................................... 6E-150
Diagnostic Aids .......................................... 6E-150
Diagnostic Trouble Code (DTC) P0131
O
2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
6E-160
DIAGNOSTIC TROUBLE CODE (DTC) P0132 O
2
SENSOR CIRCUIT HIGH VOLTAGE (BANK 1
SENSOR 1) ................................................ 6E-155
Circuit Description ..................................... 6E-155
Diagnostic Aids .......................................... 6E-155
Diagnostic Trouble Code (DTC) P0132
O
2 Sensor Circuit High Voltage
(Bank 1 Sensor 1) .................................... 6E-156
DIAGNOSTIC TROUBLE CODE (DTC) P0134
O
2 SENSOR NO ACTIVITY DEFECTED
(BANK 1 SENSOR 1) ................................. 6E-159
Circuit Description ..................................... 6E-159
Diagnostic Aids .......................................... 6E-160
Diagnostic Trouble Code (DTC) P0134
O
2 Sensor Circuit No Activity Detected
(Bank 1 Sensor 1) .................................... 6E-160
DIAGNOSTIC TROUBLE CODE (DTC) P0135
O
2 SENSOR HEATER CIRCUIT
(BANK 1 SENSOR 1) ................................. 6E-163
Circuit Description ..................................... 6E-163
Diagnostic Aids .......................................... 6E-164
Diagnostic Trouble Code (DTC) P0135
O
2 Sensor Heater Circuit (Bank 1 Sensor 1) 6E-164
DIAGNOSTIC TROUBLE CODE (DTC) P0201
INJECTOR 1 CONTROL CIRCUIT ............. 6E-167
DIAGNOSTIC TROUBLE CODE (DTC) P0202 INJECTOR 2 CONTROL CIRCUIT ............. 6E-167
DIAGNOSTIC TROUBLE CODE (DTC) P0203
INJECTOR 3 CONTROL CIRCUIT ............. 6E-167
DIAGNOSTIC TROUBLE CODE (DTC) P0204
INJECTOR 4 CONTROL CIRCUIT ............. 6E-167
Circuit Description ...................................... 6E-167
Diagnostic Aids .......................................... 6E-168
Diagnostic Trouble Code (DTC) P0201
Injector 1 Control Circuit .......................... 6E-168
Diagnostic Trouble Code (DTC) P0202
Injector 2 Control Circuit .......................... 6E-168
Diagnostic Trouble Code (DTC) P0203
Injector 3 Control Circuit .......................... 6E-168
Diagnostic Trouble Code (DTC) P0204
Injector 4 Control Circuit .......................... 6E-168
DIAGNOSTIC TROUBLE CODE (DTC) P0325
KNOCK SENSOR (KS) MODULE CIRCUIT 6E-174
Circuit Description ...................................... 6E-174
Diagnostic Aids .......................................... 6E-174
Diagnostic Trouble Code (DTC) P0325
Knock
Sensor Module Circuit ............................. 6E-174
DIAGNOSTIC TROUBLE CODE (DTC) P0327
KNOCK SENSOR (KS) CIRCUIT ............... 6E-177
Circuit Description ...................................... 6E-177
Diagnostic Aids .......................................... 6E-177
Diagnostic Trouble Code (DTC) P0327
Knock Sensor Circuit ............................... 6E-178
DIAGNOSTIC TROUBLE CODE (DTC) P0336
CRANKSHAFT POSITION (CKP) SENSOR
CIRCUIT RANGE/PERFORMANCE (58X) . 6E-180
DIAGNOSTIC TROUBLE CODE (DTC) P0337
CRANKSHAFT POSITION (CKP) SENSOR
CIRCUIT LOW INPUT (58X) ...................... 6E-180
Circuit Description ...................................... 6E-180
Diagnostic Aids .......................................... 6E-181
Diagnostic Trouble Code (DTC) P0336
Crankshaft Position Sensor Circuit
Range/performance (58x) ........................ 6E-181
Diagnostic Trouble Code (DTC) P0337
Crankshaft Position Sensor Circuit Low
Input (58x) ............................................... 6E-181
DIAGNOSTIC TROUBLE CODE (DTC) P0351
IGNITION 1 CONTROL CIRCUIT ............... 6E-186
DIAGNOSTIC TROUBLE CODE (DTC) P0352
IGNITION 2 CONTROL CIRCUIT ............... 6E-186
Circuit Description ...................................... 6E-186
Diagnostic Aids .......................................... 6E-186
Diagnostic Trouble Code (DTC) P0351
Ignition 1 Control Circuit .......................... 6E-187
Diagnostic Trouble Code (DTC) P0352
Ignition 2 Control Circuit .......................... 6E-187

ENGINE DRIVEABILITY AND EMISSIONS 6E–5
ENGINE CRANKS BUT WILL NOT RUN ..... 6E-233
HARD START SYMPTOM ............................ 6E-236
ROUGH, UNSTABLE, OR INCORRECT IDLE,
STALLING SYMPTOM ............................... 6E-239
SURGES AND/OR CHUGS SYMPTOM ...... 6E-242
HESITATION, SAG, STUMBLE SYMPTOM 6E-245
CUTS OUT, MISSES SYMPTOM ................. 6E-248
LACK OF POWER, SLUGGISH OR SPONGY
SYMPTOM ................................................. 6E-251
DETONATION/SPARK KNOCK SYMPTOM 6E-254
POOR FUEL ECONOMY SYMPTOM .......... 6E-256
EXCESSIVE EXHAUST EMISSIONS OR
ODORS SYMPTOM ................................... 6E-258
DIESELING, RUN-ON SYMPTOM ............... 6E-261
BACKFIRE SYMPTOM ................................. 6E-262
ON-VEHICLE SERVICE PROCEDURE ....... 6E-264
ENGINE CONTROL MODULE (ECM) .......... 6E-264
CRANKSHAFT POSITION (CKP) SENSOR 6E-264
ENGINE COOLANT TEMPERATURE (ECT)
SENSOR .................................................... 6E-265
INTAKE AIR TEMPERATURE (IAT) SENSOR 6E-265
MANIFOLD ABSOLUTE PRESSURE (MAP)
SENSOR .................................................... 6E-266
THROTTLE POSITION SENSOR (TPS) ...... 6E-266
IDLE AIR CONTROL (IAC) VALVE .............. 6E-267
KNOCK SENSOR ......................................... 6E-268
POWER STEERING PRESSURE (PSP)
SWITCH ..................................................... 6E-268
HEATED OXYGEN SENSOR (HO2S) ......... 6E-269
EVAP CANISTER PURGE VALVE SOLENOID 6E-269
FUEL PRESSURE RELIEF .......................... 6E-270
FUEL RAIL ASSEMBLY ............................... 6E-270
FUEL INJECTOR .......................................... 6E-271
FUEL PRESSURE REGULATOR ................ 6E-273
IGNITION COIL ............................................ 6E-275
SPARK PLUGS ............................................ 6E-275
SPARK PLUG CABLES ................................ 6E-277
EMISSION CONTROL ; CO ADJUSTER (W/O
CATALYSTIC CONVERTER) .................. 6E-277
SPECIAL SERVICE TOOLS ......................... 6E-279

6E–8 ENGINE DRIVEABILITY AND EMISSIONS
1234
(1)
(2)Injector #1 Cylinder
Injector #2 Cylinder (3)
(4)Injector #3 Cylinder
Injector #4 Cylinder (Under the ECM)
(1) Ignition Coil Module Assembly
(1) Heated Ox ygen Sensor (HO2S)

6E–28 ENGINE DRIVEABILITY AND EMISSIONS
CONNECTOR LIST
No. Connector face No. Connector face
B-24
Green Meter-BC-122
CO Adjuster
B-58
Black Check connectorE-6
Fuel injector
B-62
White Ignition switch (IGSUB : G1)E-7
Fuel injector
B-63
White Ignition switch (IGSUB : G2)E-8
Fuel injector
B-68
ImmobilizerE-9
Fuel injector
C-2
Silver Engine room-RH groundE-18
Ignition coil
C-56
ECME-60
ECM
C-107
White J/B E2E-72
Engine earth-A
C-108
White J/B E1E-74
Engine earth-B
C-121
IAT sensorE-77
O
2 sensor

6E–46 ENGINE DRIVEABILITY AND EMISSIONS
Reference Wave Form
Crankshaft Position (CKP) Sensor Reference Wave Form









0V








Measurem ent Term inal: J1-21(+) J1-6(-)
Measurem ent Scale: 10V/div 5m s/div
Measurem ent Condition: Approximately 2000rpm
Vehicle Speed Sensor (VSS) Reference Wave Form








CH1
0V


CH2
0V






Measurement Term inal: CH1: ECM J2-23(+) / CH2: VSS 3(+) GND(-)
Measurem ent Scale: CH1: 10V/div / CH2: 10V/div 50m s/div
Measurem ent Condition: A pproximately 20km /h
Note: The vehicle is without im mobilizer system,
CH1 signal is same as CH2.

Injector Control Signal Reference Wave Form









0V








Measurem ent Terminal: J1-9(+) (No.1 Cylinder) GND(-)
Measurem ent Scale: 20V/div 5m s/div
Measurement Condition: Approxim ately 2000rpm
Crankshaft Position (CKP) Sensor & Tacho Output Signal
R e fe rence Wa ve Fo rm
CH1
0V

CH2
0V

Measurement Terminal: CH1: J1-21(+) / CH2: J2-25(+) GND(-)
Measurement Scale: CH1: 2V/div / CH2: 10V/div 5ms/div
Measurement Condition: Approximately 2000rpm
Heated Oxygen Sensor (HO2S) Reference Wave Form









0V








Measurement Terminal: J2-21(+) GND(-)
Measurement Scale: 500m V/div 500m s/div
Measurem ent Condition: Approxim ately 2000rpm in Closed Loop
Ignition Coil Control Signal Reference Wave Form








CH1
0V


CH2
0V




Measurem ent Term inal: CH1: J1-19(+) / CH2: J1-18(+) GND(-)
Measurement Scale: CH1: 20V/div / CH2: 20V/div 10m s
Measurem ent Condition: Approxim ately 2000rpm