D672

D672-MICROPHONE 1 CIRCUIT LOW

For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
With the ignition on

- Set Condition:
The Hands Free Module detects a short to ground on the Microphone circuit.





Diagnostic Test

1. CHECK FOR ACTIVE DTC
Turn the ignition on.
With the scan tool, read DTCs.
Is the DTC active?

Yes

- Go To 2

No

- The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.

2. MICROPHONE
Turn the ignition off.
Disconnect the Microphone harness connector.
Turn the ignition on.
With the scan tool, read DTCs.
Is the DTC active?

Yes

- Go To 3

No

- Replace the Microphone.
- Perform the BODY VERIFICATION TEST - VER 1. Verification Tests.

3. MICROPHONE CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the Hands Free Module harness connector.
Measure the resistance between ground and the Microphone circuit.
Is the resistance below 10K ohms?

Yes

- Repair the Microphone circuit for a short to ground.
- Perform the BODY VERIFICATION TEST - VER 1. Verification Tests.

No

- Replace the Hands Free Module.
- Perform the BODY VERIFICATION TEST - VER 1. Verification Tests.