Diagnosis Procedure

The low tire pressure warning lamp does not turn OFF after several seconds have passed after engine starts.

1. CHECK TIRE PRESSURE 
   1. Turn the ignition switch ON.
      CAUTION: Never start the engine.
   2. Check the tire pressure for all wheels and adjust to the specified value. Refer to Tire .

   Is the inspection result normal?

   YES

   GO TO 2.

   NO

   Inspect or repair the tires or wheels.

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 ignition switch is turned ON.

   Is the inspection result normal?

   YES

   Inspection End.

   NO

   GO TO 3.

3. PERFORM SELF-DIAGNOSIS 

   CONSULT

   Perform "Self Diagnostic Result" of "AIR PRESSURE MONITOR".

   Is DTC detected?

   YES

   Perform DTC diagnosis procedure. Refer to DTC Index .

   NO

   GO TO 4.

4. CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT 

   Perform the trouble diagnosis for power supply and ground circuit. Refer to Diagnosis Procedure .

   Is the inspection result normal?

   YES

   Replace low tire pressure warning control unit. Refer to Removal and Installation .

   NO

   Repair or replace malfunctioning components.