| 12 & 13 |
RPM Signal |
Distributor/Ignitor Or Circuit, Starter Circuit, ECU |
| 14 |
Ignition Signal |
Ignitor Or Circuit To ECU, ECU |
| 21 |
Oxygen Sensor Signal |
Oxygen Sensor Or Circuit, Oxygen Sensor Heater, ECU |
| 22 |
Coolant Temp. Sensor Signal |
Coolant Temp. Sensor Or Circuit, ECU |
| 24 |
Intake Air Temp. Sensor Signal |
Intake Air Temp. Sensor Or Circuit, ECU |
| 25 |
Lean Air/Fuel Mixture |
Injector Or Circuit, Oxygen Sensor Or Circuit, Fuel Pressure, Ignition System, Coolant Temp. Sensor, Airflow Meter, ECU |
| 26 |
Rich Air/Fuel Mixture |
Airflow Meter, ECU, Injector Or Circuit, Oxygen Sensor Or Circuit, Fuel Pressure, Cold Start Injector Or Circuit, Coolant Temp. Sensor |
| 27 |
Sub-Oxygen Sensor Signal |
Sub-Oxygen Sensor Or Circuit, ECU |
| 31 & 32 |
Airflow Meter Signal |
Airflow Meter Or Circuit, ECU |
| 41 |
Throttle Position Sensor Signal |
Throttle Position Sensor Or Circuit, ECU |
| 42 |
Vehicle Speed Sensor Signal |
Vehicle Speed Sensor Or Circuit, ECU |
| 43 |
Starter Signal |
Starter Signal Circuit, Ignition Switch Or Circuit, ECU |
| 51 |
Switch Condition Signal |
A/C Switch/Amplifier Circuit, ECU, Neutral/Start Switch Or Circuit, TPS Or Circuit |
| 52 |
Knock Sensor Signal |
Knock Sensor Or Circuit, ECU |
| 53 |
Knock Sensor Control (ECU) |
ECU |
| 71 |
EGR System Malfunction |
EGR System, EGR Temp. Sensor Or Circuit, ECU |