Wiper Switch (HI Speed) Circuit: Procedure

1. Measure the voltage according to the value(s) in the table below.
   Fig 1: Checking Front Light ECU (2S Signal)

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   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   A51-14 (2S) - Body ground	Wiper switch not in HI position	11 to 14 V
   A51-14 (2S) - Body ground	Wiper switch in HI position	Below 1 V

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

NG: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying Windshield Wiper Switch Connector Terminal

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   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   3 (2S) - 8 (E)	Wiper switch in HI position	Below 1 Ω
   3 (2S) - 8 (E)	Wiper switch not in HI position	10 kΩ or higher

NG → See step   4 

OK: Go to next step 

1. Disconnect the L25 switch connector.
   Fig 3: Checking Harness And Connector (Windshield Wiper Switch - Front Light ECU And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A51 ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L25-3 (2S) - A51-14 (2S)	Always	Below 1 Ω
   L25-8 (E) - Body ground	Always	Below 1 Ω
   A51-14 (2S) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE