PGM-FI System

DTC Troubleshooting (cont'd)

11-524  

DTC 11: IMA Circuit Malfunction

  1. Reset the ECM/PCM (see page 11-468).
  2. Start the engine, then let it idle for more than 5 seconds.

Is the MIL on and does it indicate DTC 11?

YES

- Go to step 3.

NO

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


  1. Turn the ignition switch OFF.
  2. Turn the ignition switch ON (II).
  3. Measure voltage between ECM/PCM connector terminals E4 and E5.

ECM/PCM CONNECTOR E (31P)

Wire side of female terminals

Is there about 5 V?

YES

- Go to step 6.

NO

- Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/PCM.


  1. Measure voltage between ECM/PCM connector terminals E4 and E15.

ECM/PCM CONNECTOR E (31P)

Wire side of female terminals

Is there about 0.5-4.5 V?

YES

- Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/PCM.

NO

- Go to step 7.


  1. Measure voltage between ECM/PCM connector terminals E4 and E15.

ECM/PCM CONNECTOR S (31P)

Wire side of female terminals

Is there about 5 V?

YES

- Go to step 8.

NO

- Go to step 13.


  1. Turn the ignition switch OFF.
  2. Disconnect the IMA 3P connector.
  3. Turn the ignition switch ON (II).
  4. Measure voltage between IMA 3P connector terminals No. 1 and No. 3.

IMA 3P CONNECTOR

Wire side of female terminals

Is there about 5 V?

YES

- Go to step 12.

NO

- Repair open in the wire between the ECM/PCM (E4) and the IMA.