Rear Sunshade does not Operate with Rear Sunshade Switch: Procedure

1. Check the Data List for proper functioning of the rear sunshade switch.

   Integration Control and Panel Assembly

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Rear Sunshade Switch	Rear sunshade switch (front switch) / ON or OFF	ON: Rear sunshade switch is pressed OFF: Rear sunshade switch is not pressed	-

   OK

   "ON" (rear sunshade switch is pressed) appears on the screen.

NG → REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY 

OK: Go to next step 

1. Remove the RR J/B fuse from the engine room No. 1 junction block.
2. Remove the RR S/SHADE fuse from the luggage room junction block.
3. Measure the resistance of the fuses.

   Standard resistance

   Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

Fig 1: Identifying V25 Relay Connector And LB, LC And LF Junction Block Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the V25 relay connector.
2. Remove the LB, LC and LF Junction Block connectors.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   LC-28 - V25-1 (B)	Always	Below 1 Ω
   LC-26 - V25-3 (SW)	Always	Below 1 Ω
   LC-11 - V25-5 (E)	Always	Below 1 Ω
   LF-1 - Body ground	Always	Below 1 Ω
   LC-28 - Body ground	Always	10 kΩ or higher
   LC-26 - Body ground	Always	10 kΩ or higher
   LC-11 - Body ground	Always	10 kΩ or higher

4. Measure the voltage of the wire harness side connector.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   LB-1 - Body ground	Always	10 to 14 V

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Check the rear sunshade assembly. Refer to ON-VEHICLE INSPECTION - Step 1 .

   OK

   Rear sunshade raises and lowers.

NG → REPLACE REAR SUNSHADE ASSEMBLY 

OK: Go to next step 

1. After replacing the rear sunshade relay with a normal one, check that the rear sunshade can operate normally.

   OK

   Rear sunshade can operate normally.

NG → REPLACE No. 1 JUNCTION BLOCK ASSEMBLY 

OK → NORMAL (REAR SUNSHADE RELAY DEFECTIVE)