Turn Signal Light does not Illuminate: Procedure

1. Check if the hazard warning switch and headlight dimmer switch operate normally.
   RESULT
   
   

   Result	Proceed to
   Hazard warning switch and Headlight dimmer switch do not operate	A
   Only headlight dimmer switch does not operate	B
   Only hazard warning switch does not operate (w/ Navigation)	C
   Only hazard warning switch does not operate (w/o Navigation)	D

D → See step   10 

C → See step   8 

B → See step   6 

A: Go to next step 

1. Disconnect the E19 turn signal flasher connector.
   Fig 1: Identifying E19 Turn Signal Flasher Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance and voltage according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E19-7 (E) - Body ground	Always	Below 1 Ω

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   E19-1 (IG) - Body ground	Engine switch on (IG)	11 to 14 V
   E19-4 (B) - Body ground	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Turn Signal Light)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Check the malfunctioning turn signal light.
   RESULT
   
   

   Result	Proceed to
   LH	A
   RH	B

B → See step   5 

A: Go to next step 

1. Disconnect the E19 turn signal flasher connector.
2. Disconnect the A41 headlight connector.
3. Disconnect the K4 rear combination light connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A41-2 (B) - E19-3 (LL)	Always	Below 1 Ω
   A41-1 (E) - Body ground	Always	Below 1 Ω
   K4-4 (TRN) - E19-3 (LL)	Always	Below 1 Ω
   K4-3 (E) - Body ground	Always	Below 1 Ω
   A41-2 (B) - Body ground	Always	10 kΩ or higher
   K4-4 (TRN) - Body ground	Always	10 kΩ or higher

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK (Headlight does not flash)	B
   OK (Rear combination light does not flash)	C

C → See step   13 

B → See step   12 

A → REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the E19 turn signal flasher connector.
2. Disconnect the A47 headlight connector.
3. Disconnect the L3 rear combination light connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A47-2 (B) - E19-2 (LR)	Always	Below 1 Ω
   A47-1 (E) - Body ground	Always	Below 1 Ω
   L3-4 (TRN) - E19-2 (LR)	Always	Below 1 Ω
   L3-3 (E) - Body ground	Always	Below 1 Ω
   A47-2 (B) - Body ground	Always	10 kΩ or higher
   L3-4 (TRN) - Body ground	Always	10 kΩ or higher

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK (Headlight does not flash)	B
   OK (Rear combination light does not flash)	C

C → See step   15 

B → See step   14 

A → REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Remove the headlight dimmer switch. Refer to INSPECTION .
   Fig 2: Identifying Headlight Dimmer Switch (Turn Signal Switch)

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

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   13 (TR) - 12 (EL)	Turn signal switch right turn	Below 1 Ω
   	Turn signal switch off	10 kΩ or higher
   15 (TL) - 12 (EL)	Turn signal switch left turn	Below 1 Ω
   	Turn signal switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Headlight Dimmer Switch)

NG → See step   16 

OK: Go to next step 

1. Disconnect the E14 headlight dimmer switch connector.
2. Disconnect the E19 turn signal flasher connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E14-13 (TR) - E19-6 (ER)	Always	Below 1 Ω
   E14-15 (TL) - E19-5 (EL)	Always	Below 1 Ω
   E14-12 (EL) - Body ground	Always	Below 1 Ω
   E14-13 (TR) - Body ground	Always	10 kΩ or higher
   E14-15 (TL) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   17 

1. Disconnect the E19 turn signal flasher connector.
2. Disconnect the F52 display and navigation module display connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F52-2 (HAZ) - E19-8 (HAZ)	Always	Below 1 Ω
   F52-2 (HAZ) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the display and navigation module display with a new or normally functioning one. Refer to REMOVAL - Step 5 .
2. Check the hazard warning switch operation.

   OK

   Hazard warning switch operation is normal.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → END (DISPLAY AND NAVIGATION MODULE DISPLAY IS DEFECTIVE) 

1. Disconnect the E19 turn signal flasher connector.
2. Disconnect the F52 multi-display connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F52-2 (HAZ) - E19-8 (HAZ)	Always	Below 1 Ω
   F52-2 (HAZ) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the multi-display with a new or normally functioning one. Refer to REMOVAL - Step 5 .
2. Check the hazard warning switch operation.

   OK

   Hazard warning switch operation is normal.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → END (MULTI-DISPLAY IS DEFECTIVE)