Pinpoint Test AE: The TPMS (Tire Pressure Monitoring System) Warning Indicator Is Never Or Always On

Normal Operation and Fault Conditions
See TPMS Warning Indicator. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .

If the tire pressure status message is missing for 5 seconds or less, the TPMS warning indicator remains in its last indication state (on or off) based on the last known good message received.

If the tire pressure status message is missing for more than 5 seconds or longer, the IPC flashes the TPMS warning indicator for approximately 75 seconds then illuminates the TPMS warning indicator.

Possible Sources
- Low tire pressure
- Communication concern
- TPMS concern
- BCM concern
- GWM concern
- IPC

AE1 CHECK THE TIRE PRESSURE
- Verify the tire pressure in all tires meets the recommended tire pressures on the VC label. REFER to: Identification Codes .
Do all the tires meet the recommended tire pressures?

Yes GO to AE2

No CORRECT the tire pressures.

AE2 CARRY OUT THE IPC (INSTRUMENT PANEL CLUSTER) INDICATOR LAMP CONTROL ACTIVE COMMAND USING A DIAGNOSTIC SCAN TOOL
- Using a diagnostic scan tool, view the IPC Parameter Identifications (PIDs).
- Access the IPC and control the TPMWARN_LMPPID
- Command the TPMS warning indicator on and off while observing the TPMS warning indicator.
Does the TPMS warning indicator illuminate when commanded on and turn off when commanded off?

Yes GO to AE3

No Install a new IPC. Refer to Instrument Panel Cluster (IPC) .

AE3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM IPC (INSTRUMENT PANEL CLUSTER) SELF-TEST
- Using a diagnostic scan tool, perform the IPC self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to DTC Chart: IPC in Diagnostic Trouble Code (DTC) Chart .

No GO to AE4

AE4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM BCM (BODY CONTROL MODULE) SELF-TEST
- Using a diagnostic scan tool, perform the BCM self-test.
Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes REFER to: Body Control Module (BCM) .

No GO to AE5

AE5 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)

Using a diagnostic scan tool, check the GWM Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Are any Diagnostic Trouble Codes (DTCs) recorded?

Yes	REFER to: Communications Network .

No	If the TPMS warning indicator is never on, the system is operating correctly. If the TPMS warning indicator is always on, DIAGNOSE the TPMS. REFER to: Tire Pressure Monitoring System (TPMS) .