B143C

B143C-MICROPHONE 1 CIRCUIT HIGH







- When Monitored:
With the ignition on.

- Set Condition:
The Radio detects a short to voltage on the (X712) Microphone 1 IN (+) circuit.





1. CHECK FOR ACTIVE DTC

NOTE: Verify the connection of the Hands Free Microphone harness connector.

1. Turn the ignition on.
2. With the scan tool, read the active DTCs.

Does the scan tool display B143C-MICROPHONE 1 CIRCUIT HIGH as active?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE HANDS FREE MICROPHONE
1. Turn the ignition off.
2. Disconnect the Hands Free Microphone harness connector.
3. Turn the ignition on.
4. With the scan tool, read the active DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 3

No

- Replace the Hands Free Microphone. Microphone - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. CHECK THE (X712) MICROPHONE 1 IN (+) CIRCUIT FOR A SHORT TO VOLTAGE




1. Turn the ignition off.
2. Disconnect the Radio C1 harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (X712) Microphone 1 IN (+) circuit.

Is the voltage above 1.0 volt?

Yes

- Repair the (X712) Microphone 1 IN (+) circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Radio. Radio - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.