PGM-FI System

DTC Troubleshooting (cont'd)

11-522  

  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. If symptom/indication goes away, replace the original ECM/PCM.


DTC 10: IAT Sensor Circuit Malfunction

  1. Reset the ECM/PCM (see page 11-468).
  2. Turn the ignition switch ON (II).

Is the MIL on and does it indicate DTC 10?

YES

- Go to step 3.

NO

- Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the IAT sensor and at the ECM/PCM.


  1. Turn the ignition switch OFF.
  2. Disconnect the IAT sensor 2P connector.
  3. Measure resistance between the IAT sensor 2P connector terminals No. 1 and No. 2.

IAT SENSOR 2P CONNECTOR

Terminal side of male terminals

Is there 0.4-4.0 kohms?

YES

- Go to step 6.

NO

- Replace the IAT sensor.