| 12 | RPM Signal | ON | N/A | Distributor, Starter Or Circuit, ECM |
| 13 | RPM Signal | (2) | (3) | Distributor Or Ckt., ECM |
| 14 | Ignition Signal | ON | N/A | Ignitor Or Ckt. To ECM, ECM |
| 16 (4) | A/T Cntl. Signal | ON | N/A | ECM Or Circuit |
| 21 (5) | O2 Sensor Signal | ON | ON | O2 Sensor Or Circuit, ECM |
| 21 (6) | O2 Sensor Signal | ON | ON | O2 Sensor Or Circuit, ECM |
| 22 | Engine Coolant Temp. Sens Sgnl | ON | ON | Engine Coolant Temperature Sensor Or Circuit, ECM |
| 24 | Intake Air Temp. Sensor Signal | ON | ON | O2 Sensor Or Ckt., ECM |
| 25 | Lean Air/ Fuel Mixture | ON | ON | Injector Or Ckt., O2 Sensor Or Ckt. Fuel Pressure, Ignition System, Vacuum Leak, Compression Pressure, ECM |
| 26 | Rich Air/ Fuel Mixture | ON | ON | Injector Or Ckt., O2 Sensor Or Ckt. Fuel Pressure, Ignition System, Compression Pressure, ECM |
| 27 (6) | Sub-O2 Sensor Signal | ON | ON | Sub-O2 Sensor Or Ckt., ECM |
| 28 (5) | O2 Sensor Signal | ON | ON | O2 Sensor Or Circuit, ECM |
| 28 (6) | O2 Sensor Signal | ON | ON | O2 Sensor Or Circuit, ECM |
| 31 | Airflow Meter | ON | N/A | Airflow Meter Or Ckt., ECM |
| 35 | BARO Sensor | ON | ON | ECM |
| 41 | Throttle Position Sensor Signal | ON | ON | Throttle Position Sensor Or Circuit, ECM |
| 42 | Vehicle Sensor Signal | OFF | OFF | Vehicle Speed Sensor Or Circuit, ECM |
| 43 | Starter Signal | N/A | OFF | Starter Signal Circuit Starter Relay, Ignition Sw. Or Circuit, ECM |
| 47 (7) | Sub-ThrtlPosition Sensor Signal | OFF | ON | Sub-Throttle Position Sensor Or Circuit, ECM |
| 51 | Switch Condition Signal | N/A | OFF | A/C Switch Circuit, Park/Neutral Switch Or Circuit, TPS Or Circuit, ECM |
| 52 | Knock Sensor Signal | ON | N/A | Front Knock Sensor Or Or Circuit, ECM |
| 53 | Knock Control Signal | ON | N/A | ECM |
| 55 | Knock Sensor Signal | ON | N/A | Rear Knock Sensor Or Or Circuit, ECM |
| 71 | EGR System Malfunc. | ON | ON | EGR System, EGR Temperature Sensor Or Circuit EGR-VSV, ECM |
| 78 | Fuel Pump Control Signal | OFF | ON | Fuel Pump ECU Or Ckt., Fuel Pump, ECM Power Source Or ECM |
| (1) ON indicates MIL on instrument panel will be illuminated. N/A indicates item is not included in malfunction diagnosis when using this mode. OFF indicates MIL on instrument panel will not be illuminated even if malfunction is detected. (2) The MIL will be illuminated only if no "NE" signal is sent to ECM with engine at approximately 1000 RPM. (3) The MIL will be illuminated only if "NE" signal does not pulse 12 times to ECM during interval between "G1" and "G2" pulses. (4) Applies only to models with electronic controlled automatic transmission. (5) Applies to Federal models only. (6) Applies to Calif. models only. (7) Applies to models with traction control only. |
