Warning Lamp Stays On When Ignition Switch Is Turned On

Warning Lamp Stays On When Ignition Switch Is Turned On
DIAGNOSTIC PROCEDURE

1. PERFORM SELF-DIAGNOSIS
1. Turn ignition switch ON. (Do not start engine.)
2. Select "SELF-DIAG RESULTS" mode for "AIR PRESSURE MONITOR" with CONSULT-II.
3. Touch "ERASE".
4. Turn ignition switch OFF.
5. Start engine.
Does low tire pressure warning lamp turn OFF?
YES >> INSPECTION END
NO >> GO TO 2.

2. PERFORM ID REGISTRATION
Perform ID registration all transmitters. Refer to WT-19, "ID Registration Procedure". Transmitter ID Registration Procedure
Does low tire pressure warning lamp turn OFF?
YES >> INSPECTION END
NO >> GO TO 3.

3. CHECK CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect BCM harness connectors M1 and M2.
3. Check terminals for damage or loose connections.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.

4. CHECK POWER SUPPLY CIRCUIT (BATTERY)
Check voltage between BCM harness connector M2 terminals 42, 55 and ground.








OK or NG
OK >> GO TO 5.
NG >> Check BCM power supply circuit for open or short.

5. CHECK POWER SUPPLY CIRCUIT (IGN)
1. Turn ignition switch ON.








2. Check voltage between BCM harness connector M1 terminal 38 and ground.
OK or NG
OK >> GO TO 6.
NG >> Check BCM power supply circuit for open or short.

6. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.





2. Check continuity between BCM harness connector M2 terminal 52 and ground.
Continuity should exist.
OK or NG
OK >> Replace BCM.
NG >> Repair or replace BCM ground circuit.