Turn Signal Switch Circuit [10/2015 - 08/2019]: Procedure

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

   Body Electrical > Combination Meter > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Turn Signal Switch (Right)	Turn signal switch (right) signal	ON or OFF	ON: Turn signal switch (right) on OFF: Turn signal switch (right) off	-
   Turn Signal Switch (Left)	Turn signal switch (left) signal	ON or OFF	ON: Turn signal switch (left) on OFF: Turn signal switch (left) off	-
   Turn Switch Signal (Full Turn)	Turn signal switch (full turn) signal	ON or OFF	ON: Turn signal switch (left or right) on OFF: Turn signal switch (left and right) off	-

   Body Electrical > Combination Meter > Data List 

   Tester Display
   Turn Signal Switch (Right)
   Turn Signal Switch (Left)
   Turn Switch Signal (Full Turn)

   OK

   Normal conditions listed above are displayed.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2015 - 12/2017]  , or refer to  PROBLEM SYMPTOMS TABLE [12/2017 - 03/2018]  , or refer to  PROBLEM SYMPTOMS TABLE [03/2018 - 08/2019] 

Result: 

NG 

See step  2

1. Remove the headlight dimmer switch assembly.

   Refer to REMOVAL [10/2015 - 08/2016] , or refer to REMOVAL [08/2016 - 08/2019]

2. Measure the resistance according to the value (s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Headlight Dimmer Switch Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   12 (TR) - 15 (EL)	Turn signal switch in neutral position	10 kΩ or higher
   11 (TL) - 15 (EL)		10 kΩ or higher
   13 (CR) - 15 (EL)		10 kΩ or higher
   12 (TR) - 11 (TL)		10 kΩ or higher
   13 (CR) - 11 (TL)		10 kΩ or higher
   12 (TR) - 13 (CR)		10 kΩ or higher
   12 (TR) - 15 (EL)	Turn signal switch in right turn position	Below 1 Ω
   12 (TR) - 15 (EL)	Turn signal switch in full right turn position	Below 1 Ω
   13 (CR) - 15 (EL)		Below 1 Ω
   12 (TR) - 13 (CR)		Below 1 Ω
   11 (TL) - 15 (EL)	Turn signal switch in left turn position	Below 1 Ω
   11 (TL) - 15 (EL)	Turn signal switch in full left turn position	Below 1 Ω
   13 (CR) - 15 (EL)		Below 1 Ω
   11 (TL) - 13 (CR)		Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY. Refer to  REMOVAL [10/2015 - 08/2016]  , or refer to  REMOVAL [08/2016 - 08/2019] 

Result: 

OK 

See step  3

1. Disconnect the J11 combination meter assembly connector.
2. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J28-12 (TR) - J11-3 (ER)	Always	Below 1 Ω
   J28-11 (TL) - J11-4 (EL)	Always	Below 1 Ω
   J28-13 (CR) - J11-8 (SW)	Always	Below 1 Ω
   J28-12 (TR) or J11-3 (ER) - Body ground	Always	10 kΩ or higher
   J28-11 (TL) or J11-4 (EL) - Body ground	Always	10 kΩ or higher
   J28-13 (CR) or J11-8 (SW) - Body ground	Always	10 kΩ or higher
   J28-15 (EL) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2015 - 12/2017]  , or refer to  PROBLEM SYMPTOMS TABLE [12/2017 - 03/2018]  , or refer to  PROBLEM SYMPTOMS TABLE [03/2018 - 08/2019] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR