LIGHTING SYSTEM Turn Signal Switch Circuit

DESCRIPTION

The combination meter receives the turn signal switch information and controls the turn signal lights.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the intelligent tester on.

   4. Enter the following menus: Body / Combination Meter / Data List.

   5. Read the Data List according to the display on the intelligent tester.

      Combination Meter

      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	-

      OK
      Normal conditions listed above are displayed.

   
   

   NG

   INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY Click here

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

2. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY

   
   

   1. Remove the headlight dimmer switch assembly (for TMC, TMMR Made: Click here, (for TMMK Made: Click here.

   2. for LHD:

      
      
      1. 

         Text in Illustration

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

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

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

   3. for RHD:

      
      
      1. 

         Text in Illustration

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

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

         Standard Resistance

         Tester Connection Condition Specified Condition 20 (TR) - 16 (EL) Turn signal switch in neutral position 10 kΩ or higher 19 (TL) - 16 (EL) Turn signal switch in neutral position 10 kΩ or higher 18 (CR) - 16 (EL) Turn signal switch in neutral position 10 kΩ or higher 20 (TR) - 16 (EL) Turn signal switch in right turn position Below 1 Ω 18 (CR) - 16 (EL) Turn signal switch in full right turn position Below 1 Ω 19 (TL) - 16 (EL) Turn signal switch in left turn position Below 1 Ω 18 (CR) - 16 (EL) Turn signal switch in full left turn position Below 1 Ω

         Result
         Result Proceed to OK A NG (for TMC, TMMR Made) B NG (for TMMK Made) C

   
   

   B

   REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY Click here

   C

   REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY Click here

   A

3. CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH ASSEMBLY - COMBINATION METER ASSEMBLY)

   
   

   1. Disconnect the I17 combination meter assembly connector.

   2. for LHD:

      
      

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

         Standard Resistance
         Tester Connection Condition Specified Condition I25-12 (TR) - I17-9 (ER) Always Below 1 Ω I25-11 (TL) - I17-10 (EL) Always Below 1 Ω I25-13 (CR) - I17-8 (SW) Always Below 1 Ω I25-15 (EL) - Body ground Always Below 1 Ω I17-9 (ER) - Body ground Always 10 kΩ or higher I17-10 (EL) - Body ground Always 10 kΩ or higher I17-8 (SW) - Body ground Always 10 kΩ or higher

   3. for RHD:

      
      

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

         Standard Resistance
         Tester Connection Condition Specified Condition I25-20 (TR) - I17-9 (ER) Always Below 1 Ω I25-19 (TL) - I17-10 (EL) Always Below 1 Ω I25-18 (CR) - I17-8 (SW) Always Below 1 Ω I25-16 (EL) - Body ground Always Below 1 Ω I17-9 (ER) - Body ground Always 10 kΩ or higher I17-10 (EL) - Body ground Always 10 kΩ or higher I17-8 (SW) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here