Tire Pressure Warning Check Switch

TIRE PRESSURE WARNING CHECK SWITCH

Description





The following item can be checked by grounding the tire pressure warning check switch harness connector terminal (1).
^ The low tire pressure warning lamp in the combination meter blink according to the self-diagnostic results.

NOTE: If low tire pressure warning lamp blinks as shown in the figure, the system is normal.





^ This mode shows transmitter status is in OFF-mode. Perform transmitter wake up operation. Refer to WT-6, "TRANSMITTER WAKE UP OPERATION: Special Repair Requirement". Transmitter Wake Up Operation

Component Function Check

1. CHECK LOW TIRE PRESSURE WARNING LAMP OPERATION
Check if low tire pressure warning lamp blinks 1 second and then goes off after turning ignition switch ON.
Is inspection result normal?
YES >> GO TO 2.
NO >> Check low tire pressure warning lamp. Refer to WT-41, "Diagnosis Procedure". Low Tire Pressure Warning Lamp

2. CHECK TIRE PRESSURE WARNING CHECK SWITCH OPERATION
1. Ground the tire pressure warning check switch harness connector terminal.
2. Check the low tire pressure warning lamp blinks. Is the inspection result normal?
YES >> INSPECTION END
NO >> Proceed to diagnosis procedure. Refer to "Diagnosis Procedure".

Diagnosis Procedure

1. CHECK TIRE PRESSURE WARNING CHECK SWITCH POWER SUPPLY CIRCUIT
1. Turn the ignition switch ON.

CAUTION: Never start the engine.

2. Check voltage between tire pressure warning check switch connector and ground.





Is the inspection result normal?
YES >> Repair or replace BCM circuit. Replace BCM.
NO >> GO TO 2.

2. CHECK TIRE PRESSURE WARNING CHECK SWITCH CIRCUIT
1. Turn the ignition switch OFF
2. Disconnect BCM harness connector
3. Check continuity between BCM harness connector and tire pressure warning check switch connector.





4. Check continuity between BCM harness connector and ground.





Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.

3. CHECK BCM
Check BCM input/output signal. Refer to WT-48, "Reference Value". Reference Value
Is the inspection result normal?
YES >> INSPECTION END
NO >> Check BCM pin terminals for damage or loose connection with harness connector. If any items are damaged, repair or replace damaged parts. Replace BCM.