RPM Messages Not Received

RPM MESSAGE NOT RECEIVED

WHEN MONITORED
With the ignition on.

SET CONDITION
The Hands Free Module does not detect a PCI Bus message indicating current engine RPM.

POSSIBLE CAUSES
- LOST COMMUNICATION WITH PCM
- HANDS FREE MODULE

DIAGNOSTIC TEST

1. ATTEMPT TO COMMUNICATE WITH THE PCM
Start and idle the engine.
With the DRB, select Engine and read the Engine RPM.

Q: Was the DRB able to communicate with the PCM and read engine RPM?

YES: Go To 2

NO:

2. 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.