Radio

B143F-MICROPHONE 2 CIRCUIT HIGH





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on.

- Set Condition:
The Radio detects a short to voltage on the (X722) Microphone 2 IN (+) circuit.





1. CHECK FOR AN ACTIVE DTC

NOTE: Verify the connection of the Rearview Mirror harness connector.

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

Does the scan tool display B143F-MICROPHONE 2 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 INSIDE REARVIEW MIRROR




1. Turn the ignition off.
2. Disconnect the Rearview Mirror harness connector.
3. Turn the ignition on.
4. With the scan tool, read the active DTCs.

Does the scan tool display B143F-MICROPHONE 2 CIRCUIT HIGH as active?

Yes

- Go To 3

No

- Replace the Rearview Mirror. Interior Rearview Mirror - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. CHECK THE (X722) MICROPHONE 2 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 (X722) Microphone 2 IN (+) circuit.

Is there any voltage present?

Yes

- Repair the (X722) Microphone 2 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.