DIAGNOSTIC TROUBLE CODE DEFINITIONS
| Code | Description |
|---|
| 12 | System Normal |
| 13 | Oxygen Sensor Circuit |
| 14 | ECT Sensor, Low Temperature Indicated |
| 15 | ECT Sensor, High Temperature Indicated |
| 21 | TPS Circuit, Signal Voltage High |
| 22 | TPS Circuit, Signal Voltage Low |
| 24 | Vehicle Speed Sensor |
| 33 | MAF Sensor Circuit, Signal Voltage High |
| 34 | MAF Sensor Circuit, Signal Voltage Low |
| 41 (1) | No Ignition Signal |
| 42 (2) | Crank Angle Sensor |
| 44 (2) | Idle Switch Circuit Open Or Misadjusted |
| 45 | Idle Switch Circuit Shorted Or Misadjusted |
| 51 (3) | EGR System Circuit Check |
| 52 (3) | Fuel System Check |
| 53 (3) | ECM Ground Circuit |
| (1) Code 41 is not stored in ECM memory. To check code when engine fails to start, crank engine, and then, with ignition still on, install fuse in diagnostic terminal of fuse block. (2) When code occurs, ECM will not activate CHECK ENGINE light while engine is running. When problem is fixed, memory of defective area will automatically be erased from ECM. (3) Applicable to California models only. |
| (1) | Code 41 is not stored in ECM memory. To check code when engine fails to start, crank engine, and then, with ignition still on, install fuse in diagnostic terminal of fuse block. |
| (2) | When code occurs, ECM will not activate CHECK ENGINE light while engine is running. When problem is fixed, memory of defective area will automatically be erased from ECM. |
| (3) | Applicable to California models only. |
DIAGNOSTIC TROUBLE CODE DEFINITIONS
Scheme 57
Scheme 57: INITIAL DIAGNOSTIC PROCEDURE
Scheme 58
Scheme 58: CHART A-1 - ECM POWER & GROUND CIRCUIT CHECK
Scheme 59
Scheme 60
Scheme 60: CHART A-2 - CHECK ENGINE LIGHT INOPERATIVE
Scheme 61
Scheme 62
Scheme 62: CHART A-3 - CHECK ENGINE LIGHT STAYS ON - WON'T FLASH
Scheme 63
Scheme 64
Scheme 65
Scheme 65: CODE 13 - OXYGEN SENSOR CIRCUIT
Scheme 66
Scheme 67
Scheme 67: CODE 14 - ECT SENSOR, LOW TEMPERATURE INDICATED
Scheme 68
Scheme 69
Scheme 69: CODE 15 - ECT SENSOR, HIGH TEMPERATURE INDICATED
Scheme 70
Scheme 71
Scheme 71: CODE 21 - TPS CIRCUIT, SIGNAL VOLTAGE HIGH
Scheme 72
Scheme 73
Scheme 73: CODE 22 - TPS CIRCUIT, SIGNAL VOLTAGE LOW
Scheme 74
Scheme 75
Scheme 75: CODE 24 - VEHICLE SPEED SENSOR
Scheme 76
Scheme 77
Scheme 77: CODE 33 - MAF SENSOR CIRCUIT, SIGNAL VOLTAGE HIGH
Scheme 78
Scheme 79
Scheme 79: CODE 34 - MAF SENSOR CIRCUIT, SIGNAL VOLTAGE LOW
Scheme 80
Scheme 81
Scheme 81: CODE 41 - NO IGNITION SIGNAL
Scheme 82
Scheme 83
Scheme 83: CODE 42 - CRANK ANGLE SENSOR
Scheme 84
Scheme 85
Scheme 85: CODE 44 - IDLE SWITCH CIRCUIT OPEN OR MISADJUSTED
Scheme 86
Scheme 87
Scheme 87: CODE 45 - IDLE SWITCH CIRCUIT SHORTED OR MISADJUSTED
Scheme 88
Scheme 89
Scheme 89: CODE 51 - EGR SYSTEM CIRCUIT CHECK - CALIFORNIA MPI
Scheme 90
Scheme 91
Scheme 92
Scheme 92: CODE 52 - FUEL SYSTEM CHECK - CALIFORNIA MPI
Code 53, Schematic - ECM Ground Circuit Check, Calif. Only. Scheme 93
Scheme 93: Code 53, Schematic - ECM Ground Circuit Check, Calif. Only
Code 53, Flow Chart - ECM Ground Circuit Check, Calif. Only. Scheme 94
Scheme 94: Code 53, Flow Chart - ECM Ground Circuit Check, Calif. Only
