Only Rear Switch Cannot Operate Rear Sunshade: Procedure

1. Refer to DTC CHECK / CLEAR to check and clear the DTCs.

B → Go to step   7 

A: Go to next step 

1. Check if the vehicle is equipped with the Ottoman.
   RESULT
   
   

   Result	Proceed to
   except 4-Passenger with Ottoman	A
   for 4-Passenger with Ottoman	B

B → Go to step   6 

A: Go to next step 

1. Refer to DATA LIST / ACTIVE TEST and use the Data List to check if the rear sunshade switch is functioning properly.
   REAR CONSOLE SWITCH
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Rear Shade Switch	Rear sunshade switch / ON or OFF	ON: Rear sunshade switch pressed OFF: Rear sunshade switch not pressed	-

   OK

   Rear sunshade raises or lowers.

NG → Go to step   4 

OK → Go to step   8 

Fig 1: Identifying Z56 Rear Power Seat Switch And Z57 Curtain Switch Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the z57 curtain switch connector.
2. Disconnect the z56 power seat switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z57-8 (SW1) - z56-20 (SW1)	Always	Below 1 Ω
   z57-15 (GND) - z56-5 (GND)	Always	Below 1 Ω
   z57-8 (SW1) - Body ground	Always	10 kΩ or higher
   z57-15 (GND) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the curtain switch assembly with a new or normally functioning one.

   HINT: 

   • Refer to DISASSEMBLY for Power Seat.
   • Refer to DISASSEMBLY for Ottoman.
   • Refer to DISASSEMBLY for Fixed Seat Type.
2. Check that the rear sunshade can be raised and lowered by using the curtain switch assembly.

   OK

   Rear sunshade can be raised and lowered with curtain switch assembly.

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (for Power Seat)	B
   NG (for Ottoman)	C
   NG (for Fixed Seat Type)	D

B → Go to step   12 

C → Go to step   9 

D → Go to step   10 

A → END (CURTAIN SWITCH ASSEMBLY IS DEFECTIVE) 

1. Refer to DATA LIST / ACTIVE TEST and use the Data List to check if the rear sunshade switch is functioning properly.
   REAR CONSOLE SWITCH
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Rear Shade Switch	Rear sunshade switch / ON or OFF	ON: Rear sunshade switch pressed OFF: Rear sunshade switch not pressed	-

   OK

   Rear sunshade raises or lowers.

NG → Go to step   9 

OK → Go to step   11