DTC B1507: Open in Turn Signal Circuit; DTC B1508: Short in Turn Signal / Hazard Flasher Circuit: 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

B → See step   3 

C → See step   4 

A: Go to next step 

1. Disconnect the L125 combination meter sub-assembly connector.
2. Disconnect the 2A 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
   L125-3 (LL) - 2A-22	Always	Below 1 Ω

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   L125-5 (LR) - 2A-17	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   L125-3 (LL) - Body ground	Always	10 kΩ or higher

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   L125-5 (LR) - Body ground	Always	10 kΩ or higher

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   5 

A → REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the C3*1 or C5*2 front turn signal light connector.
   • *1: for LH
   • *2: for RH
2. Disconnect the 2C 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
   C3-1 (B) - 2C-17	Always	Below 1 Ω
   C3-2 (E) - Body ground	Always	Below 1 Ω

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   C5-1 (B) - 2C-36	Always	Below 1 Ω
   C5-2 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   C3-1 (B) - Body ground	Always	10 kΩ or higher

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   C5-1 (B) - Body ground	Always	10 kΩ or higher

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   5 

A → REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the R17*1 or S18*2 rear turn signal light connector.
   • *1: for LH
   • *2: for RH
2. Disconnect the 2D 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
   R17-6 (B) - 2D-17	Always	Below 1 Ω
   R17-5 (E) - Body ground	Always	Below 1 Ω

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   S18-6 (B) - 2D-4	Always	Below 1 Ω
   S18-5 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   FOR LH
   
   

   Tester Connection	Condition	Specified Condition
   R17-6 (B) - Body ground	Always	10 kΩ or higher

   FOR RH
   
   

   Tester Connection	Condition	Specified Condition
   S18-6 (B) - Body ground	Always	10 kΩ or higher

   RESULT
   
   

   Result	Proceed to
   NG	A
   OK	B

B → See step   5 

A → REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Remove the instrument panel junction block assembly. Refer to REMOVAL .
2. Remove the main body ECU (multiplex network body ECU).
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2A-22 - 2C-17	Always	Below 1 Ω
   2A-22 - 2D-17	Always	Below 1 Ω
   2A-17 - 2C-36	Always	Below 1 Ω
   2A-17 - 2C-4	Always	Below 1 Ω

NG → See step   7 

OK → See step   6