1.POWER SUPPLY SYSTEM CHECK

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

Low tire pressure warning control unit | — | Voltage
Connector | Terminal
M14 | 15 | Ground | Battery voltage

Is the inspection result normal?
YES>>GO TO 2.
NO>>Repair or replace the malfunctioning parts.
2.GROUND SYSTEM INSPECTION

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

Low tire pressure warning control unit | — | Continuity
Connector | Terminal
M14 | 32 | Ground | Existed

Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair or replace the malfunctioning parts.
3.CHECK FUSE/FUSIBLE LINK
Check for fusing 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 4.
NO>>Repair or replace error-detected parts.
4.CHECK TIRE PRESSURE RECEIVER POWER SUPPLY CIRCUIT

1. Connect the low tire pressure warning control unit harness connector.
2. Disconnect the tire pressure receiver harness connector.
3. Check the voltage between the tire pressure receiver harness connector and ground.

   Tire pressure receiver | — | Voltage
   Connector | Terminal
   E16 (Front LH) | 1 | Ground | 7 - 16 V
   E44 (Front RH)
   B58 (Rear LH)
   B246 (Rear RH)

Is the inspection result normal?
YES>>GO TO 5.
NO>>Repair or replace error-detected parts.
5.CHECK RECEIVER GROUND CIRCUIT

1. Disconnect the low tire pressure warning control unit harness connector.
2. Check the continuity between the harness connector terminals of the receiver and the low tire pressure warning control unit.

Tire pressure receiver | Low tire pressure warning control unit | Continuity
Connector | Terminal | Connector | Terminal
E16 (Front LH) | 4 | M14 | 26 | Existed
E44 (Front RH) | 25
B58 (Rear LH) | 24
B246 (Rear RH) | 23

Is the inspection result normal?
YES>>INSPECTION END
NO>>Repair or replace error-detected parts.