Reading Fault Codes with Analog Voltmeter
- Ground one-pin check connector B-14 (Yellow/Blue wire terminal).
- Connect analog voltmeter positive lead to Green/Red wire terminal of 6-pin self-test connector under dash. Connect voltmeter negative lead to ground.
- Diagnostic codes may be read by observing voltmeter needle long and short pulses.
- Codes are indicated by a 2-digit number. Long pulses indicate first digit. Short pulses indicate second digit. If zero is the first digit, no long pulses will be indicated and needle sweeps will begin with short pulses. A short pause will occur between codes. See Fig 1 .
ECA FAULT CODES
| Trouble Code No. | Component Circuit | Action To Take |
|---|---|---|
| 01 | Ignition Coil (-) | Go To ECA 2 |
| 09 | Cool. Temp. Sensor | Go To ECA 4 |
| 13 | Map Sensor | Go To ECA 8 |
| 15 | EGO Sensor | Go To ECA 14 |
| 16 | EGR Position Sensor | Go To ECA 19 |
| 17 | Feedback System | Go To ECA 23 |
| 18 | ABCV No. 1 | Go To ECA 28 |
| 19 | ABCV No. 2 | Go To ECA 28 |
| 20 | ABCV No. 3 | Go To ECA 28 |
| 21 | ABCV No. 4 | Go To ECA 28 |
| 22 | Shutoff Solenoid | Go To ECA 31 |
| 28 | EGR Vac. Solenoid 1 | Go To ECA 35 |
| 29 | EGR Vac. Solenoid 2 | Go To ECA 35 |
| 31 | Air Control Solenoid | Go To ECA 39 |
| 34 | E/L Solenoid Valve | Go To ECA 43 |
| 35 | A/C Solenoid Valve | Go To ECA 43 |
| 38 | EFE Heater Relay | Go To ECA 47 |
| 70 | Vacuum Switch | Go To ECA 51 |
| No Code | N/A | Go To ECA 55 |