DTC B1507: Open in Turn Signal Circuit; DTC B1508: Short in Turn Signal / Hazard Flasher Circuit [01/2017 - 05/2023]: Procedure

1. Inspect the illumination of each turn signal light.

   Result

   Result	Proceed to
   RH side turn signal light does not illuminate.	A
   LH side turn signal light does not illuminate.	B

Result: 

B 

See step  12

Result: 

A 

See step  2

1. Turn the power switch on (IG).
2. Set the headlight dimmer switch assembly to the right turn switch position.
3. Check the operation of the turn signal lights (RH side).

   Result

   Result	Proceed to
   Side turn signal light assembly (RH side) does not blink.	A
   Front turn signal light assembly (RH side) does not blink.	B
   Rear turn signal light assembly (RH side) does not blink.	C

Result: 

B 

See step  8

Result: 

C 

See step  10

Result: 

A 

See step  3

1. Disconnect the R9 front multiplex network door ECU RH connector.
2. Disconnect the D5 front turn signal light assembly RH connector.
3. Disconnect the P26 combination meter assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   R9-20 (TRNI) - P26-7 (LR)	Always	Below 1 Ω
   R9-1 (GND) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   R9-20 (TRNI) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Remove the front multiplex network door ECU RH.

   Refer to DISASSEMBLY [01/2017 - 06/2019] , or refer to DISASSEMBLY [06/2019 - 04/2020] , or refer to DISASSEMBLY [04/2020 - 05/2023]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Front multiplex network door ECU RH)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   R9-20(TRNI) - R10-16(TRN+)	Always	Below 1 Ω
   R9-1(GND) - R10-12(HTR-)	Always	Below 1 Ω
   R9-20(TRNI) - R9-1(GND)	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE FRONT MULTIPLEX NETWORK DOOR ECU RH. Refer to  DISASSEMBLY [01/2017 - 06/2019]  , or refer to  DISASSEMBLY [06/2019 - 04/2020]  , or refer to  DISASSEMBLY [04/2020 - 05/2023] 

Result: 

OK 

See step  5

1. Disconnect the R10 front multiplex network door ECU RH connector.
2. Disconnect the R6 outer mirror actuator assembly RH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   R10-16 (TRN+) - R6-16 (B)	Always	Below 1 Ω
   R10-12 (HTR-) - R6-12 (-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   R10-16 (TRN+) or R6-16 (B) - Other terminals and body ground	Always	10 kΩ or higher
   R10-12 (HTR-) or R6-12 (-) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Remove the side turn signal light assembly RH.

   Refer to REMOVAL [01/2017 - 05/2023]

2. Inspect the side turn signal light assembly RH.

   Refer to INSPECTION [01/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY RH. Refer to  REMOVAL [01/2017 - 05/2023] 

Result: 

OK 

See step  7

1. Remove the outer mirror actuator assembly RH.

   Refer to REMOVAL [01/2017 - 05/2023]

2. Inspect the outer mirror actuator assembly RH.

   Refer to INSPECTION [01/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [01/2017 - ] 

Result: 

NG 

REPLACE OUTER MIRROR ACTUATOR ASSEMBLY RH. Refer to  DISASSEMBLY [01/2017 - 05/2023] 

1. Disconnect the P26 combination meter assembly connector.
2. Disconnect the R9 front multiplex network door ECU RH connector
3. Disconnect the D5 front turn signal light assembly RH connector
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   P26-7 (LR) - D5-1 (B)	Always	Below 1 Ω
   D5-2 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   D5-1 (B) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  9

1. Remove the front turn signal light assembly RH.

   Refer to REMOVAL [01/2017 - 05/2023]

2. Inspect the front turn signal light assembly RH.

   Refer to INSPECTION [01/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [01/2017 - ] 

Result: 

NG 

REPLACE TURN SIGNAL LIGHT ASSEMBLY RH. Refer to  DISASSEMBLY [01/2017 - 06/2019]  , or refer to  DISASSEMBLY [06/2019 - 04/2020]  , or refer to  DISASSEMBLY [04/2020 - 05/2023] 

1. Disconnect the X69 rear combination light lens and body RH connector.
2. Disconnect the P26 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   X69-4 (TRN) - P26-5 (TRNR)	Always	Below 1 Ω
   X69-3 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   X69-4 (TRN) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  11

1. Remove the rear combination lens and body RH.

   Refer to REMOVAL [01/2017 - 05/2023]

2. Inspect the front turn signal light assembly RH.

   Refer to INSPECTION [01/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [01/2017 - ] 

Result: 

NG 

REPLACE REAR COMBINATION LIGHT LENS AND BODY RH. Refer to  REMOVAL [01/2017 - ] 

1. Turn the power switch on (IG).
2. Set the headlight dimmer switch assembly to the left turn switch position.
3. Check the operation of the turn signal lights (LH side).

   Result

   Result	Proceed to
   Side turn signal light assembly (LH side) does not blink.	A
   Front turn signal light assembly (LH side) does not blink.	B
   Rear turn signal light assembly (LH side) does not blink.	C

Result: 

B 

See step  18

Result: 

C 

See step  20

Result: 

A 

See step  13

1. Disconnect the S9 front multiplex network door ECU LH connector.
2. Disconnect the D6 front turn signal light assembly LH connector.
3. Disconnect the P26 combination meter assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   S9-20 (TRNI) - P26-13 (LL)	Always	Below 1 Ω
   S9-1 (GND) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   S9-20 (TRNI) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  14

1. Remove the front multiplex network door ECU LH.

   Refer to DISASSEMBLY [01/2017 - 06/2019] , or refer to DISASSEMBLY [06/2019 - 04/2020] , or refer to DISASSEMBLY [04/2020 - 05/2023]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Front multiplex network door ECU LH)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   S9-20(TRNI) - S10-16(TRN+)	Always	Below 1 Ω
   S9-1(GND) - S10-12(HTR-)	Always	Below 1 Ω
   S9-20(TRNI) - S9-1(GND)	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HEADLIGHT ECU SUB-ASSEMBLY. Refer to  REMOVAL [01/2017 - 05/2023] 

Result: 

OK 

See step  15

1. Disconnect the S10 front multiplex network door ECU LH connector.
2. Disconnect the S6 outer mirror actuator assembly LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   S10-16 (TRN+) - S6-16 (B)	Always	Below 1 Ω
   S10-12 (HTR-) - S6-12 (-)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   S10-16 (TRN+) or S6-16 (B) - Other terminals and body ground	Always	10 kΩ or higher
   S10-12 (HTR-) or S6-12 (-) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  16

1. Remove the side turn signal light assembly LH.

   Refer to REMOVAL [01/2017 - 05/2023]

2. Inspect the side turn signal light assembly LH.

   Refer to INSPECTION [01/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY LH. Refer to  REMOVAL [01/2017 - 05/2023] 

Result: 

OK 

See step  17

1. Remove the outer mirror actuator assembly LH.

   Refer to REMOVAL [01/2017 - 05/2023]

2. Inspect the outer mirror actuator assembly LH.

   Refer to INSPECTION [01/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [01/2017 - ] 

Result: 

NG 

REPLACE OUTER MIRROR ACTUATOR ASSEMBLY LH. Refer to  DISASSEMBLY [01/2017 - 05/2023] 

1. Disconnect the P26 combination meter assembly connector.
2. Disconnect the S9 front multiplex network door ECU LH connector
3. Disconnect the D6 front turn signal light assembly LH connector
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   P26-13 (LL) - D6-1 (B)	Always	Below 1 Ω
   D6-2 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   D6-1 (B) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  19

1. Remove the front turn signal light assembly LH.

   Refer to REMOVAL [01/2017 - 05/2023]

2. Inspect the front turn signal light assembly LH.

   Refer to INSPECTION [01/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [01/2017 - ] 

Result: 

NG 

REPLACE TURN SIGNAL LIGHT ASSEMBLY LH. Refer to  DISASSEMBLY [01/2017 - 06/2019]  , or refer to  DISASSEMBLY [06/2019 - 04/2020]  , or refer to  DISASSEMBLY [04/2020 - 05/2023] 

1. Disconnect the X70 rear combination light lens and body LH connector.
2. Disconnect the P26 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   P26-11 (TRNL) - X70-4 (TRN)	Always	Below 1 Ω
   X70-3 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   X70-4 (TRN) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  21

1. Remove the rear combination lens and body LH.

   Refer to REMOVAL [01/2017 - 05/2023]

2. Inspect the front turn signal light assembly LH.

   Refer to INSPECTION [01/2017 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [01/2017 - ] 

Result: 

NG 

REPLACE REAR COMBINATION LIGHT LENS AND BODY LH. Refer to  REMOVAL [01/2017 - ]