Circuit/System Testing
IMPORTANT:
You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.
- Ignition ON, observe the Ignition 1 Signal and the EC Ignition Relay Feedback scan tool parameter to determine which is less than B+.
- Ignition OFF, remove the relay that corresponds to the scan tool parameter that is less than B+.
- Ignition ON, connect a 3A fused jumper wire between B+ and the applicable ignition 1 circuit terminal. Verify that the applicable scan tool parameter displays B+.
- If the applicable scan tool parameter is less than the specified value, test the ignition 1 circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
- If all circuits test normal, replace the applicable relay.
IMPORTANT:
A resistance of 6 ohms or greater in the circuit/underhood fuse block will cause the DTC to set.