U0197-LOST COMMUNICATION WITH HANDS FREE PHONE MODULE (HFM)

For a complete wiring diagram Refer to Section 8W.

When Monitored:
With the ignition on.
Battery voltage between 10 and 16 volts.
IOD fuse installed.
TIPM is configured correctly.
Set Condition:
Bus messages not received from the HFM for approximately 2 to 5 seconds.

Possible Causes

CAN B BUS CIRCUITS OPEN OR SHORTED

DTC'S RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES

TIPM NOT CONFIGURED CORRECTLY

HANDS FREE MODULE POWER AND GROUND

HANDS FREE MODULE

MODULE THAT SET THIS DTC

1.VERIFY DTC IS ACTIVE

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

Is this DTC active?

Yes

2.CHECK FOR ANY OF THE FOLLOWING ACTIVE DTC'S

NOTE: Check for TIPM configuration, CAN B or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTC's.

Does the scan tool display any active DTC's to the conditions listed above?

Yes

Diagnose and repair the DTC. Refer to the Table of Contents for a complete list of the symptoms.

3.VERIFY THAT THE HFM IS ACTIVE ON THE BUS

Is the HFM active on the bus?

Yes

4.CHECK FOR ADDITIONAL COMMUNICATION RELATED DTC'S

Is there more than one module with active DTC's “Logged Against” the HFM?

Yes

Replace/update the Hands Free Module in accordance with the service information.
Perform the BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Replace/update the module that set this DTC in accordance with the service information.
Perform the appropriate VERIFICATION TEST.