| 12 & 13 | RPM Signal | Distributor Or Circuit, Starter Ckt, ECU |
| 14 | Ignition Signal | Ignitor Or Circuit To ECU, ECU |
| 16 | ECT Signal | Transaxle ECU Or Wiring Circuit |
| 21 | O2 Sensor Signal | O2 Sensor Or Ckt, ECU |
| 22 | Coolant Temp. Sensor Signal | Coolant Temp. Sensor Or Ckt, ECU |
| 24 (1) | Intake Air Temp. Sensor Signal | Intake Air Temp. Sensor Or Ckt, ECU |
| 25 | Lean Air/Fuel Mixture | Injector Or Ckt, O2 Sensor Or Ckt, Fuel Pressure, Ign. System, Coolant Temp. Sensor, Airflow Meter, ECU |
| 26 | Rich Air/Fuel Mixture | Airflow Meter, ECU, Injector Or Ckt, O2 Sensor Or Ckt, Fuel Pressure, Cold Start Injector Or Ckt, Coolant Temp. Sensor |
| 27 (2) | Sub-O2 Sensor Signal | Sub-O2 Sensor Or Ckt, ECU |
| 31 & 32 | Airflow Meter Signal | Airflow Meter Or Circuit, ECU |
| 41 (With ECT) (1) | TPS Sensor Signal | Throttle Position Sensor Or Ckt, ECU |
| 41 (Without ECT) (1) | TPS Sensor Signal | Throttle Position Sensor Or Ckt, ECU |
| 42 (3) | VSS Signal | Vehicle Speed Sensor Or Circuit, ECU |
| 43 (3) | Starter Signal | Starter Signal Ckt, Ignition Switch Or Ckt, ECU |
| 51 (3) | Switch Condition Signal | A/C Switch Ckt, ECU, Neutral/Start Switch Or Ckt, TPS Or Ckt |
| 71 (2) | EGR System Malfunction | EGR System, EGR Temp. Sensor Or Ckt, ECU |
| (1) CHECK ENGINE light comes on code sets on (Calif. only). (2) Used on Calif. only. (3) CHECK ENGINE light will not come on when code is set. |
