Pinpoint Test S: The Air Bag Warning Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test S: The Air Bag Warning Indicator Is Never/Always On

Normal Operation

The Instrument Panel Cluster (IPC) receives the Supplemental Restraint System (SRS) status from the Restraints Control Module (RCM) over the High Speed Controller Area Network (HS-CAN) communication bus. If an SRS (Supplemental Restraint System) concern is detected, the RCM (Restraints Control Module) sets a DTC and sends a message to the IPC (Instrument Panel Cluster) to turn on the air bag warning indicator.

If the SRS (Supplemental Restraint System) status message is missing for less than 5 seconds, the IPC (Instrument Panel Cluster) defaults the air bag warning indicator to the last on/off state, based upon the last known good SRS (Supplemental Restraint System) status message received.

If the SRS (Supplemental Restraint System) status message is missing for more than 5 seconds, the IPC (Instrument Panel Cluster) sets DTC U0151:00 and defaults the air bag warning indicator on.

This pinpoint test is intended to diagnose the following:

- RCM (Restraints Control Module)

- IPC (Instrument Panel Cluster)

PINPOINT TEST S : THE AIR BAG WARNING INDICATOR IS NEVER/ALWAYS ON

S1 CARRY OUT THE IPC (Instrument Panel Cluster) AIR BAG WARNING INDICATOR 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) air bag warning indicator (AIRBAG_LMP) active command. Command the air bag warning indicator on and off while observing the air bag warning indicator.

Does the air bag warning indicator illuminate when commanded on and turn off when commanded off?

Yes
GO to S2.

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

S2 RETRIEVE THE RECORDED DTCs FROM THE RCM (Restraints Control Module) SELF-TEST

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

Are any DTCs recorded?

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

No
GO to S3.

S3 RETRIEVE THE RECORDED DTCs FROM THE IPC (Instrument Panel Cluster) SELF-TEST

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

Are any DTCs recorded?

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

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

No
INSTALL a new RCM (Restraints Control Module). TEST the system for normal operation.