Low Tire Pressure Indicator Inoperative

Low Tire Pressure Indicator Inoperative

Perform the [Diagnostic System Check - Tire Pressure Monitoring] prior to using this diagnostic procedure.

Circuit/System Description
The remote control door lock receiver (RCDLR) sends a serial data message to the instrument panel cluster (IPC) requesting low tire pressure indicator illumination.

Description and Operation
[Tire Pressure Monitor Description and Operation]

Electrical Information Reference
- [Circuit Testing]
- [Testing for Intermittent Conditions and Poor Connections]
- [Wiring Repairs]
- [Connector Repairs]

Scan Tool Reference
- [Scan Tool Output Controls - Tire Pressure Monitoring]
- [Scan Tool Data List - Tire Pressure Monitoring]
- [Scan Tool Data Definitions - Tire Pressure Monitoring]

Circuit/System Testing
1. With the scan tool, select instrument panel special functions Lamp Test. Command the instrument panel lamps ON. Verify low tire pressure indicator lamp turns ON.
- If the lamp does not turn ON, replace the IPC.

2. Using the tire pressure monitor (TPM) special tool to observe the tire pressure of the suspected faulty sensor. Check air pressure with a known accurate hand held tire pressure gage. Compare the psi reading to the display on the TPM special tool. Verify pressure readings from special tool do not differ 2 psi or more than actual tire pressure.
- If the difference is 2 psi more, replace the suspect tire pressure sensor.

3. With the scan tool, observe tire pressures in the scan tool data display. Verify pressure readings from special tool do not differ 2 psi or more than scan tool data display.
- If the difference is 2 psi more, replace the RCDLR.

Repair Instructions
Perform the [Diagnostic Repair Verification - Vehicle Diagnostic Information] after completing the diagnostic procedure.
- [Tire Pressure Sensor Learn]
- [Control Module References] for RCDLR replacement, setup, and programming