Section 48 (Wiper System & Washer System): Inspection

WARNING: This page is about a different car, the 2006 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

WINDSHIELD WIPER SWITCH ASSY

Continuity Check

Check the continuity of each terminal of the connector.

Fig 1: Checking Continuity Of Each Terminal Of Windshield Wiper Switch
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

FRONT WIPER SWITCH

Switch position	Tester connection	Specified condition
OFF	16 (+S) - 7 (+1)	Continuity
INTO	16 (+S) - 7 (+1)	Continuity
LO	17 (+B) - 7 (+1)	Continuity
HI	17 (+B) - 8 (+2)	Continuity

REAR WIPER SWITCH

Switch position	Tester connection	Specified condition
OFF	-	No Continuity
INTO	2 (EW) - 13 (C1R)	Continuity
ON	2 (EW) - 10 (+1R)	Continuity

FRONT WASHER SWITCH

Switch position	Tester connection	Specified condition
OFF	-	No continuity
ON	11 (WF) - 2 (EW)	Continuity

REAR WASHER SWITCH

Switch position	Tester connection	Specified condition
OFF	-	No continuity
ON (OFF position side)	2 (EW) - 12 (WR)	Continuity
ON (ON position side)	2 (EW) - 10 (+1R) - 12 (WR)	Continuity

Intermittent Operation Check
1. Connect the voltmeter (+) terminal to terminal 7 (+1) of the connector, the voltmeter (-) terminal to terminal 2 (EW) of the connector.
2. Connect the battery (+) to terminal 17 (+B) of the connector, the battery (-) to terminal 2 (EW) and 16 (+S) of the connector.
3. Turn the wiper switch to INT.
4. Connect the battery (+) to terminal 16 (+S) of the connector for 5 seconds.
5. Connect the battery (-) to terminal 16 (+S) of the connector. Operate the intermittent wiper relay and check voltage between terminal 7 (+1) and terminal 2 (EW).
  
  Fig 2: Checking Voltage Between Terminal 7 (+1) And 2 (EW) Blinking Pattern (Intermittent Operation)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Operation Check (Front Wiper)
1. Turn the wiper switch to OFF.
2. Connect the battery (+) to terminal 17 (+B) of the connector, the battery (-) to terminal 16 (+S) and 2 (EW) of the connector.
3. Connect the voltmeter (+) terminal to terminal 7 (+1) of the connector and the voltmeter (-) terminal to terminal 2 (EW) of the connector. Turn the washer switch to ON and OFF, and check voltage between terminal 7 (+1) and terminal 2 (EW).
  
  Fig 3: Checking Voltage Between Terminal 7 (+1) And 2 (EW) Blinking Pattern (Operation Check (Front Wiper))
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

WINDSHIELD WIPER MOTOR ASSY
1. LO Operation Check
  1. Connect the battery (+) to terminal 1 (+1) of the connector, the battery (-) to terminal 5 (E) of the connector, and check that the motor operates with low speed (LO).
2. HI Operation Check
  1. Connect the battery (+) to terminal 4 (+2) of the connector, the battery (-) to terminal 5 (E) of the connector, and check that the motor operates with high speed (HI).
3. Automatic Stop Operation Check
  1. Connect the battery (+) to terminal 1 (+1) of the connector, the battery (-) to terminal 5 (E) of the connector. With the motor being rotated at low speed (LO), disconnect terminal 1 (+1) to stop the wiper motor operation at any position except the automatic stop position.
  2. Using a SST, connect terminal 1 (+1) and 3 (S), and the battery (+) to terminal 2 (B) to restart the motor operation at low speed.
    SST 09843-18040
    
    Fig 4: Identifying Windshield Wiper Motor Connector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Check the automatic stop position.
    Standard: See Fig 5 .
    
    Fig 5: Checking Automatic Stop Position
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
REAR WIPER MOTOR ASSY
1. Operation Check
  1. Connect the battery (+) to terminal 4 of the rear wiper motor assy, the battery (-) to terminal 5 of the rear wiper motor assy. Check that the motor turns clockwise.
  2. Reverse the polarity, and check that the motor turns counterclockwise.
    
    Fig 6: Identifying Rear Wiper Motor Connector Terminals
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002