Circuit/System Verification
- Ignition ON, engine OFF, observe the scan tool ECM GEN-F Terminal Signal parameter. The reading should be less than 5 percent.
- If greater than the specified range, refer to ECM Signal Circuit Malfunction.
- Engine running, observe the scan tool ECM GEN-F Terminal Signal parameter. The reading should be greater than 5 percent.
- If less than the specified range, refer to ECM Signal Circuit Malfunction.
- Refer to GBCM Signal Circuit Malfunction.