Left Audio Input Shorted to Ground

LEFT AUDIO INPUT SHORT TO GROUND





WHEN MONITORED
With the ignition on.

SET CONDITION
The Hands Free Module detects low voltage on the (X703) Left Audio Output circuit.

POSSIBLE CAUSES
- (X703) Left audio output circuit open
- (X703) Left audio output circuit short to ground
- (X795) Common audio output circuit open
- (X703) Left audio output circuit short to (X795) common audio output circuit
- Hands free module

DIAGNOSTIC TEST

1. CHECK FOR ACTIVE DTC
Turn the ignition on.
With the DRB, erase the HFM DTCs.
Attempt to make a phone call using the system.
With the DRB, read the HFM DTCs.

Q: 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. (X703) LEFT AUDIO OUTPUT CIRCUIT OPEN




Turn the ignition off.
Disconnect the Hands Free Module harness connector.
Disconnect the Radio C2 harness connector.
Measure the resistance of the (X703) Left Audio Output circuit between the HFM connector and the radio connector.

Q: Is the resistance below 5.0 ohms?

YES: Go To 3

NO: Repair the (X703) Left Audio Output circuit for an open Perform BODY VERIFICATION TEST - VER 1.

3. (X703) LEFT AUDIO OUTPUT CIRCUIT SHORT TO GROUND




Measure the resistance between ground and the (X703) Left Audio Output circuit.

Q: Is the resistance below 5.0 ohms?

YES: Repair the (X703) Left Audio Output circuit for short to ground. Perform BODY VERIFICATION TEST - VER 1.

NO: Go To 4

4. (X795) COMMON AUDIO OUTPUT CIRCUIT OPEN




Measure the resistance of the (X795) Common Audio Output circuit between the HFM connector and the radio connector.

Q: Is the resistance below 5.0 ohms?

YES: Go To 5

NO: Repair the (X795) Common Audio Output circuit for an open. Perform BODY VERIFICATION TEST - VER 1.

5. (X703) LEFT AUDIO OUTPUT CIRCUIT SHORT TO (X795) COMMON AUDIO OUTPUT CIRCUIT




Measure the resistance between the (X703) Left Audio Output circuit and the (X795) Common Audio Output circuit.

Q: Is the resistance below 5.0 ohms?

YES: Repair the (X703) Left Audio Output circuit for a short to the (X795) Common Audio Output circuit. Perform BODY VERIFICATION TEST - VER 1.

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.