Inspection Procedure

1. Remove the ECU-B fuse from the engine room relay block.
2. Remove the ECU-IG fuse from the main body ECU.
3. Measure the resistance.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   ECU-B fuse	Always	Below 1 Ω
   ECU-IG fuse	Always	Below 1 Ω

4. Reinstall the fuses.

NG: REPLACE FUSE 

Fig 1: Identifying ECU-B Fuse In Engine Room Relay Block

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Remove the POWER fuse from the main body ECU.
2. Turn the ignition switch ON.
3. Measure the voltage between the POWER fuse terminal of the main body ECU and body ground.

   Standard voltage 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Conditions
   POWER fuse terminal (1) - Body ground	Ignition switch ON	11 to 14 V

4. Reinstall the POWER fuse.

NG: REPLACE MAIN BODY ECU (PWR RELAY) 

Fig 2: Identifying POWER Fuse

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the J1 power window regulator master switch assembly connector.
2. Measure the voltage of the wire harness side connector.

   Standard voltage 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Switch Condition	Specified Condition
   J1-6 (B) - Body ground	Ignition switch ON	11 to 14 V

3. Measure the resistance of the wire harness side connector.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   J1-1 (E) - Body ground	Always	Below 1 Ω

4. Reconnect the J1 power window regulator master switch assembly connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 3: Identifying J1 Power Window Regulator Master Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY  (See REMOVAL  )