## Idle Control System

#### Alternator FR Signal Circuit Troubleshooting (cont'd)

11-421

17. Check for continuity between body ground and ECM/PCM connector terminal B13.

ECM/PCM CONNECTOR B (24P)

Wire side of female terminals

Is there continuity?

YES | - Repair short in the wire between the ECM/PCM (B13) and the ALT.
NO | - Substitute a known-good ECM/PCM and recheck (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM.