Inspection 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.
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 

   COWL SIDE JUNCTION BLOCK LH - RELAY, BATTERY AND BODY GROUND (RESISTANCE)
   
   

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

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

   Standard voltage 

   COWL SIDE JUNCTION BLOCK LH - RELAY, BATTERY AND BODY GROUND (VOLTAGE)
   
   

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

Fig 1: Checking Wire Harness (Cowl Side Junction Block LH - Relay, Battery & Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step. 

1. Disconnect the connector from the rear sunshade switch.
2. Measure the resistance between the terminals according to the value(s) in REAR SUNSHADE SWITCH  .

   Standard resistance 

   REAR SUNSHADE SWITCH
   
   

   Tester Connection	Condition	Specified Condition
   J12-3 (ECU) - J12-4 (E)	Rear sunshade switch is pressed	Below 1 ohms
   J12-3 (ECU) - J12-4 (E)	Rear sunshade switch is not pressed	10 k ohms or higher

   Fig 2: Checking Rear Sunshade Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE REAR SUNSHADE SWITCH 

OK: REPLACE REAR SUNSHADE RELAY