DTC B1507: Open in Turn Signal Circuit; DTC B1508: Short in Turn Signal / Hazard Flasher Circuit [11/2015 - 06/2017]: Procedure

1. Inspect the illumination of each turn signal light.

   Result

   Result	Proceed to
   Turn signal lights for one side do not illuminate.	A
   Front turn signal light does not illuminate.	B
   Rear turn signal light does not illuminate.	C
   Side turn signal light does not illuminate.	D

Result: 

B 

See step  3

Result: 

C 

See step  4

Result: 

D 

See step  5

Result: 

A 

See step  2

1. Disconnect the G3 combination meter assembly connector.
2. Disconnect the 3B instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   G3-13 (LL) - 3B-24	Always	Below 1 Ω

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   G3-7 (LR) - 3B-25	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   G3-13 (LL) - Body ground	Always	10 kΩ or higher

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   G3-7 (LR) - Body ground	Always	10 kΩ or higher

   Result

   Result	Proceed to
   NG	A
   OK	B

Result: 

A 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

B 

See step  6

1. Disconnect the A72*1 or A71*2 front turn signal light assembly connector.
   • *1: for RH
   • *2: for LH
2. Disconnect the 3C instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   A71-1 (B) - 3C-28	Always	Below 1 Ω
   A71-2 (E) - Body ground	Always	Below 1 Ω

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   A72-1 (B) - 3C-38	Always	Below 1 Ω
   A72-2 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   A71-1 (B) - Body ground	Always	10 kΩ or higher

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   A72-1 (B) - Body ground	Always	10 kΩ or higher

   Result

   Result	Proceed to
   NG	A
   OK	B

Result: 

A 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

B 

See step  6

1. Disconnect the M6*1 or M5*2 rear turn signal light connector.
   • *1: for RH
   • *2: for LH
2. Disconnect the 3D instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   M5-5 (B) - 3D-18	Always	Below 1 Ω
   M5-1 (E) - Body ground	Always	Below 1 Ω

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   M6-5 (B) - 3D-5	Always	Below 1 Ω
   M6-1 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   M5-5 (B) - Body ground	Always	10 kΩ or higher

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   M6-5 (B) - Body ground	Always	10 kΩ or higher

   Result

   Result	Proceed to
   NG	A
   OK	B

Result: 

A 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

B 

See step  6

1. Disconnect the H7*1 or J7*2 outer rear view mirror assembly connector.
   • *1: for RH
   • *2: for LH
2. Disconnect the 3B instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   J7-2 (B) - 3B-38	Always	Below 1 Ω
   J7-9 (-) - Body ground	Always	Below 1 Ω

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   H7-2 (B) - 3B-39	Always	Below 1 Ω
   H7-9 (-) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   J7-2 (B) - Body ground	Always	10 kΩ or higher

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   H7-2 (B) - Body ground	Always	10 kΩ or higher

   Result

   Result	Proceed to
   NG	A
   OK	B

Result: 

A 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

B 

See step  6

1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly (Refer to REMOVAL [11/2015 - ] ).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3B-25 - 3C-38	Always	Below 1 Ω
   3B-25 - 3D-5	Always	Below 1 Ω
   3B-25 - 3B-39	Always	Below 1 Ω
   3B-24 - 3C-28	Always	Below 1 Ω
   3B-24 - 3D-18	Always	Below 1 Ω
   3B-24 - 3B-38	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [11/2015 - ] )

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

Refer to REMOVAL [11/2015 - ] )