Symptom Description

Symptom Description

The low tire pressure warning lamp does not turn ON when the ignition switch is ON.

The low tire pressure warning lamp turns ON for approximately 1 second and then turns OFF when the ignition switch is ON. This is to check that no abnormal condition is present in the TPMS system.

The combination meter may be malfunctioning or the TPMS system may be malfunctioning if the low tire pressure warning lamp does not turn ON when the ignition switch is ON.

Diagnosis Procedure

Diagnosis Procedure

The Signal Tech II Tool [– (NI-50190)] can be used to perform the following functions: Refer to the Signal Tech II User Guide for additional information.

• Activate and display TPMS sensor IDs

• Display tire pressure reported by the TPMS sensor

• Read TPMS DTCs

• Register TPMS sensor IDs

1. CHECK TIRE PRESSURE

   1. 1. Ignition switch ON.

         CAUTION:

         Never start the engine.

      2. Check the tire pressure for all wheels and adjust to the specified value. Refer to Tire Air Pressure.

      3. Recheck the tire pressure for all wheels. Refer to Tire Air Pressure.

   Is the inspection result normal?

   YES >>

   GO TO 2.

   NO >>

   Inspect or repair the tires or wheels.

2. CHECK LOW TIRE PRESSURE WARNING LAMP OPERATION

   1. Check low tire pressure warning lamp display.

   Is the inspection result normal?

   YES >>

   Inspection End.

   NO >>

   GO TO 3.

3. PERFORM SELF DIAGNOSTIC RESULT

   1. CONSULT

      Select “Self Diagnostic Result” mode of "BCM(AIR PRESSURE MONITOR)”.

   Is DTC detected?

   YES >>

   Perform DTC diagnosis procedure. Refer to DTC Index.

   NO >>

   GO TO 4.

4. CHECK BCM POWER SUPPLY AND GROUND CIRCUIT

   1. Perform the trouble diagnosis for power supply and ground circuit. Refer to Diagnosis Procedure.

   Is the inspection result normal?

   YES>>

   Replace BCM. Refer to Removal and Installation.

   NO>>

   Repair or replace error-detected parts.