B14B7

B14B7-MICROPHONE 1 CIRCUIT OPEN





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

- When Monitored:
With the ignition on.

- Set Condition:
The Radio detects an open in the (X712) microphone circuit.





1. CHECK FOR ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Turn the ignition off, wait 30 seconds then turn the ignition on.
4. 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.
- Perform the BODY VERIFICATION TEST Body Verification Test.

2. INSIDE REARVIEW MIRROR




1. Turn the ignition off.
2. Disconnect the Inside Rearview Mirror C2 harness connector.
3. Connect a jumper wire from the (X712) Microphone 1 IN (+) circuit to ground.
4. Turn the ignition on.
5. With the scan tool, read the active DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 3

No

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

3. (X712) MICROPHONE 1IN (+) CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Radio C1 harness connector.
3. Disconnect the Inside Rearview Mirror C2 harness connector.
4. Measure the resistance of the (X712) Microphone 1IN (+) circuit between the Radio C1 connector and the Inside Rearview Mirror C2 connector.

Is the resistance below 5.0 ohms?

Yes

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

No

- Repair the (X712) Microphone 1 IN (+) circuit for an open.
- Perform the BODY VERIFICATION TEST Body Verification Test.