VIN Messages Not Received

VIN MESSAGE NOT RECEIVED

WHEN MONITORED
With the ignition on.

SET CONDITION
The Hands Free Module does not receive the VIN message from the PCM.

POSSIBLE CAUSES
- Lost communication with PCM
- PCM not active on the PCI BUS
- Hands free module

DIAGNOSTIC TEST

1. ATTEMPT TO COMMUNICATE WITH THE PCM
Turn the ignition on.
With the DRB, attempt to communicate with the PCM.

Q: Was the DRB able to communicate with the PCM?

YES: Go To 2

NO:

2. CHECK PCM ACTIVITY ON THE PCI BUS
With the DRB, select System Monitors then J1850 Module Scan.

Q: Does the DRB indicated that the PCM is present or active on the PCI Bus?

YES: Go To 3

NO:

3. ERASE DTC AND ATTEMPT TO RESET
With the DRB, erase the HFM DTC's.
Cycle the ignition switch from off to on and wait approximately 1 minute.
With the DRB, read the HFM DTC's.

Q: Did this DTC reset?

YES: Replace and program the Hands Free Module in accordance with the service information. Perform BODY VERIFICATION TEST - VER 1.

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.