Measure voltage between IMA 3P connector terminals No. 2 and No. 3. IMA 3P CONNECTOR Wire side of female terminals Is there about 5 V? YES - Replace the IMA. NO - Repair open in the wire between the ECM/PCM (E15) and the IMA. Turn the ignition switch OFF. Disconnect the IMA 3P connector. Turn the ignition switch ON (II). Measure voltage between ECM/PCM connector terminals E4 and E15. ECM/PCM CONNECTOR E (31P) Wire side of female terminals Is there about 5 V? YES - Replace the IMA. NO - Go to step 17.

Measure voltage between IMA connector terminal No. 1 and body ground. IMA 3P CONNECTOR Wire side of female terminals Is there about 5 V? YES - Go to step 18. NO - Repair open in the wire between the ECM/PCM (E5) and the IMA. Turn the ignition switch OFF. Disconnect ECM/PCM connector E (31P). Check for continuity between ECM/PCM connector terminal E15 and body ground. ECM/PCM CONNECTOR E (31P) Wire side of female terminals Is there continuity? YES - Repair short in the wire between the ECM/PCM (E15) and the IMA. NO - Substitute a known-good ECM/PCM and recheck. If symptom/indication goes away, replace the original ECM/PCM.