DTC B1507: Open in Turn Signal Circuit; DTC B1508: Short in Turn Signal / Hazard Flasher Circuit [09/2015 - ]: Procedure

1. Clear the DTCs. Refer to DTC CHECK / CLEAR [09/2015 - ] ).
2. Recheck for DTCs and check that no DTCs are output. Refer to DTC CHECK / CLEAR [09/2015 - ] ).

   OK

   B1507 and B1508 are not output.

Result: 

OK 

USE SIMULATION METHOD TO CHECK 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] )

Result: 

NG 

See step  2

1. Check the illumination of each turn signal light.
   RESULT
   
   

   Result	Proceed to
   LH side front turn signal light does not illuminate.	A
   RH side front turn signal light does not illuminate.	B
   LH side rear or side turn signal light does not illuminate.	C
   RH side rear or side turn signal light does not illuminate.	D

Result: 

B 

See step  6

Result: 

C 

See step  9

Result: 

D 

See step  13

Result: 

A 

See step  3

1. Disconnect the E121 combination meter assembly connector.
2. Disconnect the A64 headlight ECU assembly LH connector.
3. Disconnect the F94 multi-media module receiver assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E121-7 (LL) - A64-11 (TNS)	Always	Below 1 Ω
   E121-7 (LL) - F94-12 (HFL)	Always	Below 1 Ω
   A64-12 (GND) - Body ground	Always	Below 1 Ω
   E121-7 (LL) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Replace the headlight ECU sub-assembly LH. Refer to REMOVAL [09/2015 - 08/2017] , or refer to REMOVAL [08/2017 - ] ).
2. Clear the DTCs. Refer to DTC CHECK / CLEAR [09/2015 - ] ).
3. Recheck for DTCs and check that no DTCs are output. Refer to DTC CHECK / CLEAR [09/2015 - ] ).

   OK

   B1507 and B1508 are not output.

Result: 

OK 

END (HEADLIGHT ECU SUB-ASSEMBLY LH IS DEFECTIVE) 

Result: 

NG 

See step  5

1. Replace the headlight unit assembly LH. Refer to REMOVAL [09/2015 - ] ).
2. Clear the DTCs. Refer to DTC CHECK / CLEAR [09/2015 - ] ).
3. Recheck for DTCs and check that no DTCs are output. Refer to DTC CHECK / CLEAR [09/2015 - ] ).

   OK

   B1507 and B1508 are not output.

Result: 

OK 

END (HEADLIGHT UNIT ASSEMBLY LH IS DEFECTIVE) 

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [09/2015 - ] )

1. Disconnect the E121 combination meter assembly connector.
2. Disconnect the A65 headlight ECU assembly RH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E121-13 (LR) - A65-11 (TNS)	Always	Below 1 Ω
   A65-12 (GND) - Body ground	Always	Below 1 Ω
   E121-13 (LR) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

1. Replace the headlight ECU sub-assembly RH. Refer to REMOVAL [09/2015 - 08/2017] , or refer to REMOVAL [08/2017 - ] ).
2. Clear the DTCs. Refer to DTC CHECK / CLEAR [09/2015 - ] ).
3. Recheck for DTCs and check that no DTCs are output. Refer to DTC CHECK / CLEAR [09/2015 - ] ).

   OK

   B1507 and B1508 are not output.

Result: 

OK 

END (HEADLIGHT ECU SUB-ASSEMBLY RH IS DEFECTIVE) 

Result: 

NG 

See step  8

1. Replace the headlight unit assembly RH. Refer to REMOVAL [09/2015 - ] ).
2. Clear the DTCs. Refer to DTC CHECK / CLEAR [09/2015 - ] ).
3. Recheck for DTCs and check that no DTCs are output. Refer to DTC CHECK / CLEAR [09/2015 - ] ).

   OK

   B1507 and B1508 are not output.

Result: 

OK 

END (HEADLIGHT UNIT ASSEMBLY RH IS DEFECTIVE) 

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [09/2015 - ] )

1. Disconnect the E121 combination meter assembly connector.
2. Disconnect the I41 outer mirror control ECU assembly LH connector.
3. Disconnect the K4 rear combination light assembly LH connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E121-12 (RLT) - I41-11 (TRNI)	Always	Below 1 Ω
   E121-12 (RLT) - K4-4 (TRN)	Always	Below 1 Ω
   I41-7 (GND) - Body ground	Always	Below 1 Ω
   K4-3 (E) - Body ground	Always	Below 1 Ω
   E121-12 (RLT) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  10

1. Replace the outer rear view mirror assembly LH. Refer to REMOVAL [09/2015 - ] ).
2. Inspect the outer rear view mirror assembly LH. Refer to INSPECTION [09/2015 - ] ).

Result: 

NG 

See step  12

Result: 

OK 

See step  11

1. Replace the outer mirror control ECU assembly LH. Refer to REMOVAL [09/2015 - ] ).

   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
   A-11 (TRNI) - B-16 (TRN+)	Always	Below 1 Ω
   A-7 (GND) - B-12 (HTR-)	Always	Below 1 Ω
   A-11 (TRNI) or B-16 (TRN+) - Body ground	Always	10 kΩ or higher
   A-7 (GND) or B-12 (HTR-) - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [09/2015 - ] )

Result: 

NG 

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY LH 

Refer to REMOVAL [09/2015 - ] )

1. Replace the side turn signal light assembly LH. Refer to REMOVAL [09/2015 - ] ).
2. Inspect the side turn signal light assembly LH. Refer to INSPECTION [09/2015 - ] ).

Result: 

OK 

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH 

Refer to REMOVAL [09/2015 - ] )

Result: 

NG 

REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY LH 

Refer to REMOVAL [09/2015 - ] )

1. Disconnect the E121 combination meter assembly connector.
2. Disconnect the I38 outer mirror control ECU assembly RH connector.
3. Disconnect the L3 rear combination light assembly RH connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E121-8 (RRT) - I38-11 (TRNI)	Always	Below 1 Ω
   E121-8 (RRT) - L3-4 (TRN)	Always	Below 1 Ω
   I38-7 (GND) - Body ground	Always	Below 1 Ω
   L3-3 (E) - Body ground	Always	Below 1 Ω
   E121-8 (RRT) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  14

1. Replace the outer rear view mirror assembly RH. Refer to REMOVAL [09/2015 - ] ).
2. Inspect the outer rear view mirror assembly RH. Refer to INSPECTION [09/2015 - ] ).

Result: 

NG 

See step  16

Result: 

OK 

See step  15

1. Replace the outer mirror control ECU assembly RH. Refer to REMOVAL [09/2015 - ] ).

   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
   A-11 (TRNI) - B-16 (TRN+)	Always	Below 1 Ω
   A-7 (GND) - B-12 (HTR-)	Always	Below 1 Ω
   A-11 (TRNI) or B-16 (TRN+) - Body ground	Always	10 kΩ or higher
   A-7 (GND) or B-12 (HTR-) - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [09/2015 - ] )

Result: 

NG 

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY RH 

Refer to REMOVAL [09/2015 - ] )

1. Replace the side turn signal light assembly RH. Refer to REMOVAL [09/2015 - ] ).
2. Inspect the side turn signal light assembly RH. Refer to INSPECTION [09/2015 - ] ).

Result: 

OK 

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH 

Refer to REMOVAL [09/2015 - ] )

Result: 

NG 

REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY RH 

Refer to REMOVAL [09/2015 - ] )