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

Instrumentation, Message Center and Warning Chimes

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

Normal Operation

The Instrument Panel Cluster (IPC) receives the Tire Pressure Monitoring System (TPMS) messages from the Tire Pressure Monitor (TPM) /Vehicle Security Module (VSM) over the Medium Speed Controller Area Network (MS-CAN) communication bus. If the TPM (Tire Pressure Monitor) /VSM (Vehicle Security Module) determines that the tire pressure has exceeded the low tire pressure limits, a message is sent to the IPC (Instrument Panel Cluster) to illuminate the TPMS (Tire Pressure Monitoring System) warning indicator. If a TPMS (Tire Pressure Monitoring System) fault condition exists or if the TPMS (Tire Pressure Monitoring System) is in the tire training mode, the TPM (Tire Pressure Monitor) /VSM (Vehicle Security Module) sends a message to the IPC (Instrument Panel Cluster) to flash the TPMS (Tire Pressure Monitoring System) warning indicator.

If the TPMS (Tire Pressure Monitoring System) status message is missing or invalid for less than 5 seconds, the IPC (Instrument Panel Cluster) defaults the TPMS (Tire Pressure Monitoring System) warning indicator to the last setting (on or off) based upon the last known good message received. If the TPMS (Tire Pressure Monitoring System) status message is missing for more than 5 seconds, the IPC (Instrument Panel Cluster) flashes the TPMS (Tire Pressure Monitoring System) indicator for approximately 75 seconds then turns the indicator on steady. If the TPMS (Tire Pressure Monitoring System) status message is invalid for more than 5 seconds, the IPC (Instrument Panel Cluster) sets flashes the TPMS (Tire Pressure Monitoring System) indicator for approximately 75 seconds then turns the indicator on steady.

This pinpoint test is intended to diagnose the following:

- Tire pressure

- TPMS (Tire Pressure Monitoring System) concern

- TPM (Tire Pressure Monitor) /VSM (Vehicle Security Module)

- IPC (Instrument Panel Cluster)

PINPOINT TEST Y : THE TPMS (Tire Pressure Monitoring System) WARNING INDICATOR IS NEVER/ALWAYS ON

Y1 CHECK THE TIRE PRESSURE

- Verify that the tire pressure in all tires meets the recommended tire pressures on the Vehicle Certification (VC) label.

Do all the tires meet the recommended tire pressures?

Yes
GO to Y2.

No
CORRECT the tire pressures. TEST the system for normal operation.

Y2 CARRY OUT THE IPC (Instrument Panel Cluster) DEALER TEST MODE

- Ignition ON.

- Enter the IPC (Instrument Panel Cluster) dealer test mode. Scroll through the displays until LED is displayed.

Does the TPMS (Tire Pressure Monitoring System) warning indicator illuminate?

Yes
GO to Y3
No
INSTALL a new IPC (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) Service and Repair. TEST the system for normal operation.

Y3 RETRIEVE THE RECORDED DTCs FROM 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 U0140:00, GO to Pinpoint Test AQ Pinpoint Test AQ: DTC U0140:00.

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

No
GO to Y4

Y4 RETRIEVE THE RECORDED DTCs FROM THE TPM (Tire Pressure Monitor) /VSM (Vehicle Security Module) SELF-TEST

- Check for recorded TPM (Tire Pressure Monitor) /VSM (Vehicle Security Module) DTCs from the self-test.

Are any DTCs recorded?

Yes
REFER to the Diagnostic Trouble Code (DTC) Chart in Wheels and Tires.

No
If the TPMS (Tire Pressure Monitoring System) warning indicator is never on, the system is operating correctly at this time.

If the TPMS (Tire Pressure Monitoring System) warning indicator is always on, INSTALL a new TPM (Tire Pressure Monitor) module. TEST the system for normal operation.