| 12 | RPM Signal | ON | | Distributor, Starter or Ckt, ECM |
| 13 | RPM Signal | ON | | Distributor or Ckt, ECM |
| 14 | Ignition Signal | ON | | Ignitor or Ckt to ECM. ECM |
| 21 | O2 Sensor Signal | ON | | O2 Sensor or Ckt, ECM |
| 22 | Coolant Temp. Sensor Signal | ON | | Coolant Temp. Sensor or Ckt, ECM |
| 24 | Intake Air Temp. Sensor Signal | ON (3) | | Intake Air Temp. Sensor or Ckt, ECM |
| 25 | Lean Air/Fuel Mixture | ON | | Loose Ground, Injector or Ckt, Fuel Pressure, Ignition System, Coolant Temp. Sensor,Airflow Meter, Vacuum Sensor,O2 Sensor or Ckt, CompressionPressure, ECM |
| 26 (3) | Rich Air/Fuel Mixture | ON | | Loose Ground, Injector or Ckt, Fuel Pressure, Ignition System, Coolant Temp. Sensor,Airflow Meter, Vacuum Sensor,O2 Sensor or Ckt, Cold Start Injector or Ckt, Compression Pressure, ECM |
| 31 | Vacuum Sensor Signal | ON | | Vacuum Sensor or Ckt, ECM |
| 41 | TPS Signal | ON (3) | | Throttle Position Sensor or Ckt, ECM |
| 42 | Vehicle Speed Sensor Signal | OFF | | Vehicle Speed Sensor or Ckt, ECM |
| 43 | Starter Signal | OFF | | Starter Signal Ckt, Main Relay, Ignition Switch or Ckt, ECM |
| 51 | Switch Condition Signal | OFF | | A/C Switch, Park/Neutral Switch or Ckt, TPS or Ckt, ECM |
| 71 (4) | EGR System Malfunction | ON | | EGR System, EGR Temp. Sensor or Ckt, EGR-VSV, ECM |
| (1) ON indicates MIL on instrument panel will be illuminated. OFF indicates MIL on instrument panel will be not be illuminated even if malfunction is detected. (2) Test mode is not used on this vehicle. (3) The MIL will be illuminated on California models only. (4) Applies to California models only. |
