Pinpoint Test Ac: The TPMS (Tire Pressure Monitoring System) Warning Indicator Is Never Or Always On
- Normal Operation and Fault Conditions
See TPMS Indicator. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description .
If the tire pressure warning indicator message is missing for 5 seconds or less, the TPMS warning indicator remains in its last indication state (on or off), based upon the last message received.
If the tire pressure warning indicator message is missing for 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
- GWM concern
- IPC
- AC1 CHECK THE TIRE PRESSURE
- Verify the tire pressure in all tires meets the recommended tire pressures on the vehicle certification label. REFER to: Identification Codes
Do all the tires meet the recommended tire pressures?
Yes GO to AC2 No CORRECT the tire pressures. - AC2 PERFORM THE 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: Instrument Panel Cluster (IPC) . No GO to AC3 - AC3 PERFORM THE BCM (BODY CONTROL MODULE) SELF-TEST
- Using a diagnostic scan tool, perform the BCM self-test.
Are any DTCs recorded?
Yes REFER to: Body Control Module (BCM) No GO to AC4 - AC4 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 GO to AC5 - AC5 PERFORM 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).
- Select the IPC TPMS warning indicator (TPMWARN_LMP) PID.
- 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 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) No INSTALL a new IPC. Refer to Instrument Panel Cluster (IPC) .