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

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AA: 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 request to the IPC (Instrument Panel Cluster) to illuminate the air bag warning indicator.

If the SRS (Supplemental Restraint System) status is missing or invalid for less than 5 seconds, the IPC (Instrument Panel Cluster) defaults the air bag warning indicator to the last state (on or off) based upon the last known good message received. If the SRS (Supplemental Restraint System) status message is deemed invalid for more than 5 seconds, the IPC (Instrument Panel Cluster) defaults the air bag warning indicator on. 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 AA : THE AIR BAG WARNING INDICATOR IS NEVER/ALWAYS ON

AA1 CARRY OUT THE IPC (Instrument Panel Cluster) RESTRAINTS OUTPUT 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 (AIRBAG_LMP) active command. Command all the warning indicators on and off. Observe the air bag warning indicator.

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

Yes
GO to AA2.

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

AA2 RETRIEVE THE RECORDED DTCs FROM THE RCM (Restraints Control Module) 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 AA3.

AA3 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
If the air bag warning indicator is never on, the system is operating correctly at this time.

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