Trouble Code Identification
TROUBLE CODE IDENTIFICATION
| Code No. | Circuit Affected |
|---|---|
| No Code | System Normal |
| 11 | ECU (B+) |
| 12 & 13 | RPM Signal |
| 14 | Ignition Signal |
| 21 | Oxygen Sensor Signal |
| 22 | Coolant Temp. Sensor Signal |
| 24 | Intake Air Temp. Sensor Signal |
| 31 | Airflow Meter Signal |
| 32 | Airflow Meter Signal HAC Sensor Signal |
| 41 | Throttle Position Sensor Signal |
| 42 | Vehicle Speed Sensor Signal |
| 43 | Starter Signal |
| 51 | Switch Signal |
TROUBLE CODES & PROBABLE CAUSE
| Code No. | Probable Cause |
|---|---|
| 11 | Main Relay and/or Circuit, Ignition Switch and/or Circuit, ECU |
| 12 | Distributor and/or Circuit, Starter Signal, ECU |
| 13 | Distributor and/or Circuit, ECU |
| 14 | Ignition Coil, Ignitor and/or Circuit, ECU |
| 21 | O2 Sensor and/or O2 Heater Signal and/or Circuit, ECU |
| 22 | Coolant Temp. Sensor and/or Circuit, ECU |
| 24 | Intake Air Temp. Sensor or Circuit, ECU |
| 31 | Airflow Meter and/or Circuit, ECU |
| 41 | Throttle Position Sensor and/or Circuit, ECU |
| 42 | Speed Sensor and/or Circuit, ECU |
| 43 | Ignition Switch and/or Circuit, ECU |
| 51 | Throttle Position Sensor and/or Circuit A/C Switch Circuit, A/C Amplifier, ECU Neutral/Start Switch and/or Circuit, Accelerator Pedal and/or Cable |