## PGM-FI System

#### DTC Troubleshooting (cont'd)

11-237

DTC 11: IMA Circuit Malfunction

1. Reset the ECM/PCM (see page 11-168).
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.

3. Turn the ignition switch OFF.
4. Turn the ignition switch ON (II).
5. 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.

6. 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.

7. 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.

8. Turn the ignition switch OFF.
9. Disconnect the IMA 3P connector.
10. Turn the ignition switch ON (II).
11. 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.