C1754 LOW TIRE PRESSURE WARNING CONTROL UNIT

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

   
   

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.
  

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

YES>>GO TO 3.

NO>>If an open circuit or other damage is malfunctioning detected.

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

   
   

YES>>GO TO 4.

NO>>Repair or replace error-detected parts.

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.

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.

Check the internal tire pressure of all wheels. Refer to Tire.

YES>>GO TO 2.

NO>>Check the road wheels and tires. Adjust the tire pressures to the specified values.

Perform transmitter ID registration. Refer to Transmitter ID Registration Procedure.

>>END