B145B

B145B-TELEMATICS MIRROR CONTROL CIRCUIT OPEN







- When Monitored:
With the ignition on.

- Set Condition:
The Hands Free Module detects an open on the (X793) Microphone Feed 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 BODY VERIFICATION TEST - VER 1. Body Verification Test

2. (X793) MICROPHONE FEED CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Hands Free Module harness connector.
3. Disconnect the Inside Rear View Mirror C2 harness connector.
4. Measure the resistance of the (X793) Microphone Feed circuit between the HFM connector and the inside rear view mirror connector.

Is the resistance below 5.0 ohms?

Yes

- Go To 3

No

- Repair the (X793) Microphone Feed circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.

3. INSIDE REAR VIEW MIRROR
1. Replace the Inside Rear View Mirror.
2. Cycle the ignition switch from off to on at least 5 times, leaving the ignition on for a minimum of 90 seconds per cycle.
3. Attempt to make a phone call with the system.
4. With the scan tool, read the active DTC's.

Does the scan tool display this DTC as active?

Yes

- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Hands Free Module.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.

No

- Repair is complete.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test.