Low Tire Pressure Warning Lamp Does Not Turn On

LOW TIRE PRESSURE WARNING LAMP DOES NOT TURN ON

Description

The low tire pressure warning lamp does not illuminate when the power switch is turned ON.
NOTE:
The low tire pressure warning lamp illuminates for approximately 1 second and then turns OFF when the power 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 power switch is turned ON.


Diagnosis Procedure


1. CHECK LOW TIRE PRESSURE WARNING LAMP SIGNAL

With CONSULT
1.Turn the power switch ON.

CAUTION:
Never set the vehicle to READY.
2.Select "ACTIVE TEST" in "AIR PRESSURE MONITOR" of "BCM".
3.Touch "WARNING LAMP" to turn ON the low tire pressure warning lamp.
When "ACTIVE TEST" is performed, does the low tire pressure warning lamp in the combination meter turn
ON?
YES- GO TO 2.
NO- GO TO 3.

2. CHECK LOW TIRE PRESSURE WARNING LAMP OPERATION

Check that the low tire pressure warning lamp is turned OFF after turns ON for approximately 1 second, when the power switch is turned ON.
Is the inspection result normal?
YES- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
NO- Replace the BCM. Refer to "Removal and Installation" Service and Repair.

3. CHECK COMBINATION METER POWER SUPPLY CIRCUIT

Perform the trouble diagnosis for combination meter power supply circuit. Refer to "Diagnosis Procedure" Component Tests and General Diagnostics.
Is the inspection result normal?
YES-1- INSPECTION END
NO- Repair or replace error-detected parts.