Pinpoint Test Z: The Safety Belt Warning Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test Z: The Safety Belt Warning Indicator Is Never/Always On

Normal Operation

The Restraints Control Module (RCM) monitors the safety belt position. The RCM (Restraints Control Module) provides the safety belt status to the Instrument Panel Cluster (IPC) over the High Speed Controller Area Network (HS-CAN) communication bus.

If the safety belt status is missing or invalid for less than 5 seconds, the IPC (Instrument Panel Cluster) defaults the safety belt warning indicator to the last state (on or off) based upon the last known good message received. If the IPC (Instrument Panel Cluster) does not receive the safety belt buckle switch status from the RCM (Restraints Control Module) for more than 5 seconds, the IPC (Instrument Panel Cluster) sets DTC U0151:00 and defaults the safety belt warning indicator off. If the RCM (Restraints Control Module) message is deemed invalid by the IPC (Instrument Panel Cluster) for more than 5 seconds, the IPC (Instrument Panel Cluster) sets defaults the safety belt warning indicator off.

This pinpoint test is intended to diagnose the following:

- RCM (Restraints Control Module)

- IPC (Instrument Panel Cluster)

PINPOINT TEST Z : THE SAFETY BELT WARNING INDICATOR IS NEVER/ALWAYS ON

Z1 RETRIEVE THE RECORDED RCM (Restraints Control Module) DTCs FROM THE SELF-TEST

- Check for recorded RCM (Restraints Control Module) DTCs from the self-test.

Are any DTCs recorded?

Yes
REFER to Restraints and Safety Systems &/or Air Bag Systems.

No
GO to Z2.

Z2 RETRIEVE THE RECORDED DTCs FROM THE IPC (Instrument Panel Cluster) SELF-TEST

- Check for recorded IPC (Instrument Panel Cluster) DTCs from the self-test.

Are any DTCs recorded?

Yes
For DTC U0151:00, GO to Pinpoint Test AR Pinpoint Test AR: DTC U0151:00.

For all other DTCs, REFER to DTC Charts Instrumentation, Message Center and Warning Chimes.

No
GO to Z3.

Z3 CARRY OUT THE IPC (Instrument Panel Cluster) INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: IPC (Instrument Panel Cluster) DataLogger.

- Select the IPC (Instrument Panel Cluster) all warning indicators (SBLT_LAMP) active command. Command all the warning indicators on and off. Observe the safety belt warning indicator.

Does the safety belt warning indicator illuminate when commanded on and turn off when commanded off?

Yes
If the safety belt warning indicator is never on, the system is operating correctly at this time.

If the safety belt warning indicator is always on, INSTALL a new RCM (Restraints Control Module). TEST the system for normal operation.

No
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) Service and Repair. TEST the system for normal operation.