6-1-2 ENGINE GENERAL INFORMATION AND DIAGNOSIS (H25 ENGINE)
On-Board Diagnostic System
(Vehicle with Diagnosis Connector) ........... 6-1-12
Precaution in Diagnosing Trouble.............. 6-1-13
Engine Diagnostic Flow Table ................... 6-1-14
Malfunction Indicator Lamp (MIL)
Check......................................................... 6-1-20
Diagnostic Trouble Code (DTC) Check ..... 6-1-20
Diagnostic Trouble Code (DTC)
Clearance................................................... 6-1-22
Diagnostic Trouble Code (DTC) Table....... 6-1-23
Fail-Safe Table........................................... 6-1-27
Scan Tool Data .......................................... 6-1-28
Scan Tool Data Definitions ........................ 6-1-31
Engine Diagnosis Table............................. 6-1-35
ECM (PCM) Substitution............................ 6-1-41
Table A-1 Malfunction Indicator Lamp
Circuit Check.............................................. 6-1-55
MIL does not come on or MIL dimms
at ignition switch ON leaving engine
OFF........................................................ 6-1-55
Table A-2 Malfunction Indicator Lamp
Circuit Check.............................................. 6-1-57
MIL remains on after engine starts......... 6-1-57
Table A-3 Malfunction Indicator Lamp
Check......................................................... 6-1-57
MIL flashes at ignition switch ON
(vehicle with monitor connector) ............ 6-1-57
Table A-4 Malfunction Indicator Lamp
Check......................................................... 6-1-58
MIL does not flash or just remains on
even with grounding diagnosis switch
terminal (vehicle with monitor
connector) .............................................. 6-1-58
Table A-5 ECM (PCM) Power and
Ground Circuit Check................................. 6-1-59
MIL does not light at ignition switch
ON and engine does not start though
it is cranked up....................................... 6-1-59
DTC P0100 Mass Air Flow Sensor
Circuit Malfunction (DTC No.33, 34) .......... 6-1-61
DTC P0110 Intake Air Temp. Circuit
Malfunction (DTC No.23, 25) ..................... 6-1-63
DTC P0115 Engine Coolant Temp.
Circuit Malfunction (DTC No.14, 15) .......... 6-1-65
DTC P0120 Throttle Position Circuit
Malfunction (DTC No.21, 22) ..................... 6-1-67
DTC P0121 Throttle Position Circuit
Performance Problem................................ 6-1-69
DTC P0130 (Vehicle without Diagnosis
Connector) HO2S (Bank-1 Sensor-1)
Circuit Malfunction ..................................... 6-1-71
DTC P0133 HO2S (Bank-1 Sensor-1)
Circuit Slow Response............................... 6-1-74
DTC P0134 (Vehicle without Diagnosis
Connector)/P0130 (vehicle with diagnosis
connector) HO2S (Bank-1 Sensor-1)
No Activity Detected (DTC No.13) ............. 6-1-75
DTC P0135 HO2S (Bank-1 Sensor-1)
Heater Circuit Malfunction.......................... 6-1-77
DTC P0136 HO2S (Bank-1 Sensor-2)
Circuit Malfunction ......................................6-1-79
DTC P0141 HO2S (Bank-1 Sensor-2)
Heater Circuit Malfunction ..........................6-1-81
DTC P0150 (Vehicle without Diagnosis
Connector) HO2S (Bank-2 Sensor-1)
Circuit Malfunction ......................................6-1-83
DTC P0153 HO2S (Bank-2 Sensor-1)
Circuit Slow Response................................6-1-86
DTC P0154 (Vehicle without Diagnosis
Connector)/P0150 (Vehicle with
Diagnosis Connector) HO2S (Bank-2
Sensor-1) No Activity Detected
(DTC No.26) ...............................................6-1-87
DTC P0155 HO2S (Bank-2 Sensor-1)
Heater Circuit Malfunction ..........................6-1-89
DTC P0156 HO2S (Bank-2 Sensor-2)
Circuit Malfunction ......................................6-1-91
DTC P0161 HO2S (Bank-2 Sensor-2)
Heater Circuit Malfunction ..........................6-1-93
DTC P0171 Fuel System Too Lean
(Bank-1)
DTC P0172 Fuel System Too Rich
(Bank-1) ......................................................6-1-95
DTC P0174 Fuel System Too Lean
(Bank-2)
DTC P0175 Fuel System Too Rich
(Bank-2) ......................................................6-1-97
DTC P0300 Random Misfire Detected
DTC P0301 Cylinder 1 Misfire Detected
DTC P0302 Cylinder 2 Misfire Detected
DTC P0303 Cylinder 3 Misfire Detected
DTC P0304 Cylinder 4 Misfire Detected
DTC P0305 Cylinder 5 Misfire Detected
DTC P0306 Cylinder 6 Misfire Detected.....6-1-99
DTC P0325 (DTC No.43) Knock Sensor
Circuit Malfunction ....................................6-1-101
DTC P0335 Crankshaft Position Sensor
Circuit Malfunction ....................................6-1-103
DTC P0340 Camshaft Position Sensor
Circuit Malfunction (DTC No.42)...............6-1-105
DTC P0400 Exhaust Gas Recirculation
Flow Malfunction (DTC No.51) .................6-1-108
DTC P0403 (DTC No.51) Exhaust Gas
Recirculation Circuit Malfunction ..............6-1-111
DTC P0420 Catalyst System (Bank-1)
Efficiency Below Threshold
DTC P0430 Catalyst System (Bank-2)
Efficiency Below Threshold.......................6-1-113
DTC P0443 EVAP Control System Purge
Control Valve Circuit Malfunction..............6-1-116
EVAP canister purge valve and its
circuit check ..........................................6-1-118
EVAP canister purge system check......6-1-120
DTC P0460 Fuel Level Sensor Circuit
High Input .................................................6-1-121
DTC P0500 Vehicle Speed Sensor
Malfunction (DTC No.24) ..........................6-1-123
DTC P0505 Idle Air Control System
Malfunction ...............................................6-1-126
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