1.CHECK POWER SUPPLY CIRCUIT

1. Turn the ignition switch OFF.
2. Disconnect the low tire pressure warning control unit harness connector.
3. Check the voltage between the harness connectors of the low tire pressure warning control unit 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>>
If the results of any of the following check items are not normal, repair or replace the malfunctioning part.

- 10 A fuse [No. 3 in fuse block (J/B)]
- Harness open circuit or short circuit between the ignition switch and harness connector terminal 15 of the low tire pressure warning control unit.
- Check battery voltage.

2.CHECK GROUND CIRCUIT
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

Are the check results normal?
YES>>GO TO 3.
NO>>If an open circuit or other damage is malfunctioning detected.
3.CHECK LOW TIRE PRESSURE WARNING CONTROL UNIT AND TIRE PRESSURE RECEIVER CIRCUIT

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

   Low tire pressure warning control unit | Tire pressure receiver | Continuity
   Connector | Terminal | Connector | Terminal
   M14 | 10 | E16 (Front LH) | 1 | Exited
   22 | 2
   6 | 3
   26 | 4
   9 | E44 (Front RH) | 1
   21 | 2
   5 | 3
   25 | 4
   8 | B58 (Rear LH) | 1
   20 | 2
   4 | 3
   24 | 4
   7 | B246 (Rear RH) | 1
   19 | 2
   3 | 3
   23 | 4

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 | 10 | Ground | Not existed
   22
   6
   26
   9
   21
   5
   25
   8
   20
   4
   24
   7
   19
   3
   23

Is the inspection result normal?
YES>>GO TO 4.
NO>>Repair or replace error-detected parts.
4.PERFORM THE SELF-DIAGNOSIS
With CONSULT-III

1. Perform transmitter ID registration for all wheels. Refer to Transmitter ID Registration Procedure.
2. Perform self-diagnosis of the low tire pressure warning control unit.

Is DTC “C1754” detected?
YES>>Replace the low tire pressure warning control unit.
NO>>Check for looseness or damage at the harness connector pins of the low tire pressure warning control unit. Repair or replace if necessary.