Inspection Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Combination Switch / Data List.
5. Read the display on the Techstream.

   Combination Switch (Windshield Wiper Switch Assembly) 

   DATA LIST - COMBINATION SWITCH (WINDSHIELD WIPER SWITCH ASSEMBLY)
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Front Fog Light Switch	Front fog light switch signal / ON or OFF	ON Front fog light switch is in ON position OFF Front fog light switch is not in ON position	-
   Passing Light Switch	Passing light switch signal / ON or OFF	ON Headlight dimmer switch is in FLASH (PASS) position OFF. Headlight dimmer switch is not in FLASH (PASS) position	-
   Dimmer HI Switch	High beam switch signal / ON or OFF	ON Headlight dimmer switch is in HI position OFF Headlight dimmer switch is not in HI position	-
   Light Auto Switch	Auto light switch signal / ON or OFF	ON Light control switch is in AUTO position OFF Light control switch is not in AUTO position	-
   Head Light Switch	Headlight control switch signal / ON or OFF	ON Light control switch is in HEAD position OFF Light control switch is not in HEAD position	-
   Tail Light Switch	Taillight switch signal / ON or OFF	ON Light control switch is in TAIL or HEAD position OFF Light control switch is off	-
   Turn Left Switch	Turn signal switch LH signal / ON or OFF	ON Light control switch is in LH position OFF Light control switch is not in LH position	-
   Turn Right Switch	Turn signal switch RH signal / ON or OFF	ON Light control switch is in RH position OFF Light control switch is not in RH position	-
   Ignition Switch Signal	Engine switch signal / ON or OFF	ON Engine switch on (IG) OFF Engine switch off	-

   OK: Condition information can be displayed. 

NG: Go to step 2 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )

HINT:

Inspect the items that did not change as a result of monitoring the Data List.

1. Remove the headlight dimmer switch assembly.
2. Measure the resistance according to the value (s) in the table below.

   Standard Resistance: 

   Light Control Switch 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   12 (EL) - 18 (T)	OFF	10 kΩ or higher
   18 (T) - 19 (A)	OFF	10 kΩ or higher
   19 (A) - 20 (H)	OFF	10 kΩ or higher
   12 (EL) -18 (T)	TAIL	Below 1 Ω
   12 (EL) - 18 (T)	HEAD	Below 1 Ω
   18 (T) - 20 (H)	HEAD	Below 1 Ω
   12 (EL) - 19 (A)	AUTO	Below 1 Ω

   Fig 1: Identifying Headlight Dimmer Switch Assembly Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Dimmer Switch 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   11 (HU) - 12 (EL)	LOW	10 kΩ or higher
   11 (HU) -12 (EL)	HIGH	Below 1 Ω
   12 (EL) -17 (HF)	HIGH FLASH	Below 1 Ω

   Turn Signal Switch 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   12 (EL) -13 (TR)	Right turn	Below 1 Ω
   12 (EL) -13 (TR)	Neutral	10 kΩ or higher
   12 (EL) -15 (TL)	Neutral	10 kΩ or higher
   12 (EL) -15 (TL)	Left turn	Below 1 Ω

   Fog Light Switch 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   3 (LFG) - 4 (BFG)	OFF	10 kΩ or higher
   3 (LFG) - 4 (BFG)	ON	Below 1 Ω

NG: REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY  (See HEADLIGHT DIMMER SWITCH  )

OK: Go to next Step 

1. Disconnect the J26 windshield wiper switch assembly connector
2. Measure the resistance according to the value (s) in the table below.

   Standard Resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   J26-S (E) - Body ground	Always	Below 1 Ω

3. Measure the voltage according to the value (s) in the table below.

   Standard Voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   J26-1 (B) - J26-5 (E)	Always	11 to 14 V
   J26-2 (IG) - J26-5 (E)	Engine switch on (IG)	11 to 14 V

Fig 2: Identifying J26 Windshield Wiper Switch Assembly Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY  (See REMOVAL )