PGM-FI System

DTC Troubleshooting (cont'd)

11-399  

  1. Measure voltage between ECM/PCM connector terminal A26 and body ground.

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there about 5 V?

YES

- Repair open in the wire between the ECM/PCM (A26) and TDC sensor.

NO

- Go to step 11.


  1. Turn the ignition switch OFF.
  2. Disconnect ECM/PCM connector A (31P).
  3. Check for continuity between ECM/PCM connector terminal A26 and body ground.

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there continuity?

YES

- Repair short in the wire between the ECM/PCM (A26) and the TDC sensor.

NO

- Substitute a known-good ECM/PCM and recheck (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM.


DTC P1607:

Malfunction in ECM/PCM Internal Circuit

  1. Reset the ECM/PCM (see page 11-312).
  2. Turn the ignition switch ON (II).
  3. Wait 40 seconds.

Is DTC P1607 indicated?

YES

- Substitute a known-good ECM/PCM and recheck (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM.

NO

- Intermittent failure, system is OK at this time.