Low Tire Pressure Warning Lamp Does Not Turn On

LOW TIRE PRESSURE WARNING LAMP DOES NOT TURN ON

Description

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

The lamp bulb may be burnt out or the tire pressure monitoring system may be malfunctioning if the low tire pressure warning lamp does not illuminate when the ignition switch is turned ON.

Diagnosis Procedure

1. CHECK SELF-DIAGNOSIS RESULTS With CONSULT-III
1. On the "SELECT DIAG" mode, select the "SELF-DIAG RESULTS" screen.
2. Check display contents in self-diagnostic results.
Is "CAN COMM CIRCUIT" displayed in the self-diagnosis display items?
YES >> Perform trouble diagnosis for CAN communication system. Refer to LAN-18, "Trouble Diagnosis Flow Chart". Diagnosis and Repair Workflow
NO >> GO TO 2.

2. CHECK COMBINATION METER
Check combination meter function. Refer to MWI-40, "CONSULT-III Function (METER/M&A)". CONSULT-III Function (METER/M&A)
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.

3. CHECK LOW TIRE PRESSURE WARNING LAMP
1. Turn the ignition switch OFF.
2. Disconnect BCM harness connectors.
3. Turn the ignition switch ON.

CAUTION: Never start the engine.

Does low tire pressure warning lamp turn ON?
YES >> GO TO 4.
NO >> Check combination meter and repair or replace. Refer to MWI-38, "Diagnosis Description".Diagnosis Description

4. CHECK SYMPTOM
Check symptom again.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 5.

5. CHECK BCM
Check BCM input/output signal. Refer to WT-48, "Reference Value". Reference Value
Is the inspection result normal?
YES >> GO TO 4.
NO >> GO TO 6.

6. CHECK BCM HARNESS CONNECTOR
Check BCM pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES >> Replace BCM.
NO >> Repair or replace damaged parts.