DIAGNOSTIC TROUBLE CODE DEFINITIONS
| Code | Description |
|---|
| 12 | System Normal |
| 13 | Heated Oxygen Sensor Circuit |
| 14 | ECT Sensor, Low Temperature Indicated |
| 15 | ECT Sensor, High Temperature Indicated |
| 21 | Throttle Position Sensor CKT, Signal Voltage High |
| 22 | Throttle Position Sensor CKT, Signal Voltage Low |
| 23 | IAT Sensor Circuit, Low Temperature Indicated |
| 24 | Vehicle Speed Sensor |
| 25 | IAT Sensor Circuit, High Temperature Indicated |
| 31 | MAP Sensor Circuit, Signal Voltage High |
| 32 | MAP 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 |
| 53 (3) | ECM Ground Circuit Check |
| (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 17
Scheme 17: INITIAL DIAGNOSTIC PROCEDURE
Scheme 18
Scheme 18: CHART A-1 - ECM POWER & GROUND CIRCUIT CHECK
Scheme 19
Scheme 20
Scheme 20: CHART A-2 - CHECK ENGINE LIGHT INOPERATIVE
Scheme 21
Scheme 22
Scheme 22: CHART A-3 - CHECK ENGINE LIGHT STAYS ON - WON'T FLASH
Scheme 23
Scheme 24
Scheme 25
Scheme 25: CODE 13 - HEATED OXYGEN SENSOR CIRCUIT
Scheme 26
Scheme 27
Scheme 27: CODE 14 - ECT SENSOR, LOW TEMPERATURE INDICATED
Scheme 28
Scheme 29
Scheme 30
Scheme 30: CODE 21 - THROTTLE POSITION SENSOR CKT, SIGNAL VOLTAGE HIGH
Scheme 31
Scheme 32
Scheme 33
Scheme 33: CODE 23 - IAT SENSOR CIRCUIT, LOW TEMPERATURE INDICATED
Scheme 34
Scheme 35
Scheme 35: CODE 24 - VEHICLE SPEED SENSOR
Scheme 36
Scheme 37
Scheme 37: CODE 25 - IAT SENSOR CIRCUIT, HIGH TEMPERATURE INDICATED
Scheme 38
Scheme 39
Scheme 39: CODE 31 - MAP SENSOR CIRCUIT, SIGNAL VOLTAGE HIGH
Scheme 40
Scheme 41
Scheme 41: CODE 32 - MAP SENSOR CIRCUIT, SIGNAL VOLTAGE LOW
Scheme 42
Scheme 43
Scheme 43: CODE 41 - NO IGNITION SIGNAL
Scheme 44
Scheme 45
Scheme 45: CODE 42 - CRANK ANGLE SENSOR
Scheme 46
Scheme 47
Scheme 47: CODE 44 - IDLE SWITCH CIRCUIT OPEN OR MISADJUSTED
Scheme 48
Scheme 49
Scheme 50
Scheme 50: CODE 51 - EGR SYSTEM CIRCUIT CHECK - CALIFORNIA
Scheme 51
Scheme 52
Scheme 53
Scheme 53: CODE 53 - ECM GROUND CIRCUIT CHECK - CALIFORNIA
Scheme 54
