Rear Sunshade Does Not Operate With Rear Sunshade Switch: Procedure

1. Remove the LH-IG fuse from the cowl side junction block LH.
2. Measure the resistance of the fuses.

   Standard resistance

   Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

1. Disconnect the Q24 relay connector.
   Fig 1: Checking Wire Harness (Cowl Side Junction Block LH - Relay, Battery & Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the Q2 cowl side junction block LH connector.
3. Disconnect the J12 rear sunshade switch connector.
4. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   REV (Q24-2) - OP02 (Q2-20)	Always	Below 1 Ω
   SW (Q24-3) - J12-3	Always	Below 1 Ω
   E (Q24-5) - Body ground	Always	Below 1 Ω
   REV (Q24-2) - Body ground	Always	10 kΩ or higher
   SW (Q24-3) - Body ground	Always	10 kΩ or higher

5. Turn the engine switch on (IG).
6. Measure the voltage of the wire harness side connector.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   IG (Q24-1) - Body ground	Always	10 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the connector from the rear sunshade switch.
   Fig 2: Checking Rear Sunshade Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance between the terminals according to the value(s) in the table below.

   Standard resistance

   Tester connection	Condition	Specified condition
   J12-3 (ECU) - J12-4 (E)	Rear sunshade switch is pressed	Below 1 Ω
   J12-3 (ECU) - J12-4 (E)	Rear sunshade switch is not pressed	10 kΩ or higher

NG → REPLACE REAR SUNSHADE SWITCH 

OK → REPLACE REAR SUNSHADE RELAY