Manual Up / Down Function does not Operate on Rear LH Only: Wiring Diagram

1. Disconnect the P38 regulator switch connector.
2. Turn the ignition switch ON.
3. Check the voltage between the terminal 4 of the wire harness side connector and the body ground.

   Standard voltage 

   POWER SOURCE
   
   

   Terminal No.	Condition	Specified Condition
   P38-3 - Body ground	Ignition switch ON	10 to 14 V

   Fig 2: Checking Wire Harness (Power Source)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR (REGULATOR SWITCH - POWER WINDOW RELAY) 

OK: Go to next step. 

1. Remove the regulator switch.
2. Check the resistance between the switch terminals when the switch is operated, as shown in POWER WINDOW REGULATOR SWITCH (REAR LH)  .

   Standard resistance 

   POWER WINDOW REGULATOR SWITCH (REAR LH)
   
   

   Terminal No.	Regulator Switch	Specified Condition
   1 - 2, 3 - 4	UP	Below 1 Ω
   1 - 2, 3 - 5	OFF
   2 - 3, 4 - 5	DOWN

   Fig 3: Inspecting Power Window Regulator Switch (Rear LH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE POWER WINDOW REGULATOR SWITCH (REAR LH) 

OK: Go to next step. 

1. Disconnect the P42 motor connector.
2. Check the resistance between the wire harness side connectors.

   Standard resistance 

   REGULATOR SWITCH - MOTOR
   
   

   Terminal No.	Specified Condition
   P38-2 (D) - P42-2	Below 1 Ω
   P38-4 (U) - P42-1

3. Check the resistance between the P38 regulator switch connector and body ground.

   Standard resistance 

   REGULATOR SWITCH - BODY GROUND
   
   

   Terminal No.	Specified Condition
   P38-2 (D) - Body ground	10 kΩ or higher
   P38-4 (U) - Body ground

   Fig 4: Checking Wire Harness (Regulator Switch - Motor) (Regulator Switch - Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step. 

1. Remove the motor.
2. Apply battery voltage to connector terminals 1 and 2.
3. Check that the motor smoothly rotates.
   NOTE: Do not apply battery voltage to any terminals except terminals 1 and 2.

   Standard 

   POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH)
   
   

   Terminal No.	Specified Condition
   Battery positive (+) -> 1 Battery negative (-) -> 2	Motor gear rotates clockwise
   Battery positive (+) - 2 Battery negative (-) -> 1	Motor gear rotates counterclockwise

   Fig 5: Inspecting Power Window Regulator Motor Assembly (Rear LH)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH) 

OK: REPAIR OR REPLACE HARNESS AND CONNECTOR (MASTER SWITCH - REGULATOR SWITCH)