MIRROR POWER CIRCUIT SHORT TO GROUND
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
With the ignition on.
- Set Condition:
The Hands Free Module detects low voltage on the (X793) Microphone Feed circuit.
| Possible Causes |
| (X793) MICROPHONE FEED CIRCUIT OPEN |
| (X793) MICROPHONE FEED CIRCUIT SHORT TO GROUND |
| AUTOMATIC DAY/NIGHT MIRROR |
| HANDS FREE MODULE |
Diagnostic Test
1. CHECK FOR ACTIVE DTCTurn the ignition on.
With the scan tool, erase the HFM DTCs.
Attempt to make a phone call using the system.
With the scan tool, read the HFM DTCs.
Did this DTC reset?
Yes
- Go To 2
No
- The condition that set this DTC is no longer present. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
2. (X793) MICROPHONE FEED CIRCUIT OPEN
Turn the ignition off.
Disconnect the Hands Free Module C1 harness connector.
Disconnect the Automatic Day/Night Mirror C2 harness connector.
Measure the resistance of the (X793) Microphone Feed circuit between the HFM connector and the Automatic Day/Night 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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
3. (X793) MICROPHONE FEED CIRCUIT SHORT TO GROUND
Measure the resistance between ground and the (X793) Microphone Feed circuit
Is the resistance below 100.0 ohms?
Yes
- Repair the (X793) Microphone Feed circuit for short to ground.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Go To 4
4. AUTOMATIC DAY/NIGHT MIRROR
Replace the Inside Automatic Day/Night Mirror in accordance with the service information.
Turn the ignition on.
With the scan tool, erase the HFM DTCs.
Attempt to make a phone call using the system.
With the scan tool, read the HFM DTCs.
Did this DTC reset?
Yes
- Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Hands Free Module in accordance with the service information.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Repair is complete.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).