Diagnosis Procedure

1. Turn the ignition switch OFF.
2. Check for blown (open) of the fuse and fusible link at the low tire pressure warning control unit.
   • Check the 10 A fuse [No. 3 in fuse block (J/B)]

Is the inspection result normal?

YES

GO TO 2.

NO

Repair or replace error-detected parts.

1. Disconnect the low tire pressure warning control unit harness connector.
2. Turn the ignition switch ON.
   CAUTION: Never start engine.
3. Check the voltage between the low tire pressure warning control unit and ground.

   Low tire pressure warning control unit		--	Voltage
   Connector	Terminal
   M43	15	Ground	Battery voltage

4. Turn the ignition switch OFF.
5. Check the voltage between the low tire pressure warning control unit and ground.

   Low tire pressure warning control unit		--	Voltage (Approx.)
   Connector	Terminal
   M43	15	Ground	0 V

Is the inspection result normal?

YES

GO TO 3.

NO

Check the following. If any items are damaged, repair or replace damaged parts.

• Harness for short or open between ignition switch and low tire pressure warning control unit harness connector
• Ignition voltage.

1. Turn the ignition switch OFF.
2. Check the continuity between the low tire pressure warning control unit harness connector and ground.

   Low tire pressure warning control unit		--	Continuity
   Connector	Terminal
   M43	32	Ground	Existed

   • Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

INSPECTION END

NO

Repair open circuit or short to ground or short to power in harness or connectors.