Low Tire Pressure Warning Lamp Blinks

LOW TIRE PRESSURE WARNING LAMP BLINKS

Description

DESCRIPTION
The low tire pressure warning lamp illuminates or blinks.
However, a check is necessary because the symptom may not be caused by a system malfunction. For example, the transmitter may not be initialized.

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

Blink Mode A





^ 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

Diagnosis Procedure

1. CHECK TIRE PRESSURE WARNING CHECK SWITCH POWER SUPPLY
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 >> GO TO 2.
NO >> Riper or replace damaged parts.

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 >> Check tire pressure warning check switch. Refer to WT-39, "Diagnosis Procedure". Tire Pressure Warning Check Switch
NO >> Repair or replace the BCM.