NA5 - Check IDM Output From ICM - IDM Fault - IDM Circuit Open

- Key Off.

- DVOM on 40 volt AC scale.

- Push and hold EI diagnostic harness IDM button down (opens IDM circuit to PCM).

- Start engine and measure voltage between J30 (EI diagnostic harness IDM detector) and J7 (B-) at breakout box.

- Is AC voltage greater than 5.0 volts?

YES -- GO to NA6. NA6 - Check For IDM Short In PCM - PCM Disconnected KOEC

NO -- REPLACE PCM. No IDM output from module. REMOVE all test equipment. RECONNECT all components. Clear continuous memory. Clearing Diagnostic Trouble Codes

Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes