Inspection Procedure

NOTE: It is necessary to perform initialization (See INITIALIZATION ) after registration (See REGISTRATION ) of the transmitter IDs into the tire pressure warning ECU, after the ECU have been replaced.

CHECK TIRE PRESSURE WARNING RESET SWITCH FUNCTION
1. Perform the tire pressure warning reset switch test in TEST MODE PROCEDURE (See TEST MODE PROCEDURE ).
  OK:
  
  Reset switch ON:
  
  Tire pressure warning light illuminates.
  
  Reset switch OFF:
  
  Tire pressure warning light blinks.
NG: Go to step 2

OK: END

INSPECT TIRE PRESSURE WARNING RESET SWITCH

Disconnect the tire pressure warning reset switch connector.

Measure the resistance between terminals 1 and 2 of the tire pressure warning reset switch when the tire pressure warning switch is ON or OFF.

Standard resistance

RESISTANCE SPECIFIED CONDITION

Switch Condition	Specified Condition
ON	Below 1 Ω
OFF	10 kΩ or higher

Fig 1: Inspecting Tire Pressure Warning Reset Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE TIRE PRESSURE WARNING RESET SWITCH (See REMOVAL )

OK: Go to next step

CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING RESET SW - TIRE PRESSURE WARNING ECU)

Disconnect the tire pressure warning reset switch E53 connector and tire pressure warning ECU E60 connector.

Measure the resistance according to the value(s) in the table below.

Standard resistance

RESISTANCE SPECIFIED CONDITION

Switch Condition	Specified Condition
E60-1 (CLSW) - E53-1	Below 1 Ω
E60-1 (CLSW) - Body ground	10 kΩ or higher
E53-2 - Body ground	Below 1 Ω

Fig 2: Identifying Tire Pressure Warning Reset Switch E53 And Warning ECU E60 Connector Terminals

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE TIRE PRESSURE WARNING ECU (See REMOVAL )