Measure voltage between body ground and ECM/PCM connector terminal E5. ECM/PCM CONNECTOR E (31P) Wire side of female terminals Is there about 5 V? YES - Replace the IMA. NO - Go to step 67. Turn the ignition switch OFF. Disconnect ECM/PCM connector E (31P). Check for continuity between ECM/PCM connector terminal E5 and body ground. ECM/PCM CONNECTOR E (31P) Wire side of female terminals Is there continuity? YES - Repair short in the wire between ECM/PCM (E5) and the IMA. NO - Substitute a known-good ECM/PCM and recheck. If the symptom/indication goes away, replace the original ECM/PCM.

Turn the ignition switch OFF. Jump the SCS line (see step 2 on page 11-467). Turn the ignition switch ON (II), and read the MIL. Are any DTCs indicated? YES - Go to the DTC Troubleshooting Index. NO - Go to step 73. Measure voltage between ECM/PCM connector terminal E29 and body ground. ECM/PCM CONNECTOR E (31P) Wire side of female terminals Is there about 5 V (or battery voltage)? YES - Repair open in the wire between the DLC and the ECM/PCM (E3, E29). After repairing it, check the DTC and go to the DTC Troubleshooting Index. NO - Go to step 74. Turn the ignition switch OFF. Disconnect the DLC Terminal Box. Turn the ignition switch ON (II).