LEFT AUDIO INPUT 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 (X41) Audio MUX Left circuit.
| Possible Causes |
| (X41) AUDIO MUX LEFT CIRCUIT OPEN |
| (X41) AUDIO MUX LEFT CIRCUIT SHORT TO GROUND |
| (X140) AUDIO RETURN CIRCUIT OPEN |
| (X41) AUDIO MUX LEFT CIRCUIT SHORT TO (X140) AUDIO RETURN
CIRCUIT |
| 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. (X41) AUDIO MUX LEFT CIRCUIT OPEN
Turn the ignition off.
Disconnect the Hands Free Module harness connector.
Disconnect the Radio C2 harness connector.
Measure the resistance of the (X41) Audio MUX Left circuit between the HFM connector and the radio connector.
Is the resistance below 5.0 ohms?
Yes
- Go To 3
No
- Repair the (X41) Audio MUX Left circuit for an open
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
3. (X41) AUDIO MUX LEFT CIRCUIT SHORT TO GROUND
Measure the resistance between ground and the (X41) Audio MUX Left circuit.
Is the resistance below 5.0 ohms?
Yes
- Repair the (X41) Audio MUX Left 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. (X140) AUDIO RETURN CIRCUIT OPEN
Measure the resistance of the (X140) Audio Return circuit between the HFM connector and the radio connector.
Is the resistance below 5.0 ohms?
Yes
- Go To 5
No
- Repair the (X140) Audio Return circuit for an open.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
5. (X41) AUDIO MUX LEFT CIRCUIT SHORT TO (X140) AUDIO RETURN CIRCUIT
Measure the resistance between the (X41) Audio MUX Left circuit and the (X140) Audio Return circuit.
Is the resistance below 5.0 ohms?
Yes
- Repair the (X41) Audio MUX Left circuit for a short to the (X140) Audio Return circuit.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- 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).