DTC B1507: Open in Turn Signal Circuit; DTC B1508: Short in Turn Signal / Hazard Flasher Circuit [12/2013 - 11/2016]: Procedure

1. Inspect the illumination of each turn signal light.

   Result	Proceed to
   All RH turn signal lights or all LH turn signal lights do not blink.	A
   RH side turn signal light does not illuminate.	B
   LH side turn signal light does not illuminate.	C

Result: 

B 

See step  4

Result: 

C 

See step  15

Result: 

A 

See step  2

1. Disconnect the F21 combination meter assembly connector.
2. RH side
   1. Disconnect the 4A instrument panel junction block assembly connector.
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection	Condition	Specified Condition
      F21-13 (LR) - 4A-1	Always	Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection	Condition	Specified Condition
      F21-13 (LR) - Body ground	Always	10 kΩ or higher

3. LH side
   1. Disconnect the 4D instrument panel junction block assembly connector.
   2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)

      Tester Connection	Condition	Specified Condition
      F21-7 (LL) - 4D-8	Always	Below 1 Ω

      Standard Resistance (Check for Short)

      Tester Connection	Condition	Specified Condition
      F21-7 (LL) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [12/2013 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

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

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      4A-1 - 4F-7	Always	Below 1 Ω
      4A-1 - 4H-6	Always	Below 1 Ω
      4A-1 - 4A-15	Always	Below 1 Ω

3. LH side
   1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection	Condition	Specified Condition
      4D-8 - 4F-5	Always	Below 1 Ω
      4D-8 - 4H-7	Always	Below 1 Ω
      4D-8 - 4D-20	Always	Below 1 Ω

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

1. Turn the ignition switch to ON.
2. Set the headlight dimmer switch assembly to the right turn switch position.
3. Check the operation of the turn signal lights.

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

Result: 

B 

See step  7

Result: 

C 

See step  13

Result: 

A 

See step  5

1. Disconnect the A25 headlight assembly RH connector.
2. Disconnect the 4F instrument panel junction block 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
   A25-1 (B) - 4F-7	Always	Below 1 Ω
   A25-4 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   4F-7 - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [12/2013 - ]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4A-1 - 4F-7	Always	Below 1 Ω

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

1. Confirm the vehicle type.

   Result	Proceed to
   w/ Seat Position Memory	A
   w/o Seat Position Memory	B

Result: 

B 

See step  11

Result: 

A 

See step  8

1. Disconnect the H2 outer mirror control ECU assembly RH connector.
2. Disconnect the 4A instrument panel junction block 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
   H2-11 (TRNI) - 4A-15	Always	Below 1 Ω
   H2-7 (GND) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   4A-15 - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  9

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [12/2013 - ]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Instrument Panel Junction Block Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4A-1 - 4A-15	Always	Below 1 Ω

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result: 

OK 

See step  10

1. Replace the outer mirror control ECU assembly RH with a new or known good one.

   Refer to REMOVAL [12/2013 - ]

2. Check for the DTCs.

   Refer to DTC CHECK / CLEAR [12/2013 - ]

   Body Electrical > Combination Meter > Trouble Codes 

   Result	Proceed to
   DTCs are output.	A
   DTCs are not output.	B

Result: 

A 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result: 

B 

END 

1. Disconnect the H1 side turn signal light assembly RH connector.
2. Disconnect the 4A instrument panel junction block 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
   H1-4 (B) - 4A-15	Always	Below 1 Ω
   H1-9 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   4A-15 - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  12

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [12/2013 - ]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Instrument Panel Junction Block Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4A-1 - 4A-15	Always	Below 1 Ω

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

1. Disconnect the M32 rear combination light assembly RH connector.
2. Disconnect the 4H instrument panel junction block 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
   M32-4 (B) - 4H-6	Always	Below 1 Ω
   M32-6 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   4H-6 - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  14

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [12/2013 - ]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4A-1 - 4H-6	Always	Below 1 Ω

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

1. Turn the ignition switch to ON.
2. Set the headlight dimmer switch assembly to the left turn switch position.
3. Check the operation of the turn signal lights.

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

Result: 

B 

See step  18

Result: 

C 

See step  24

Result: 

A 

See step  16

1. Disconnect the A17 headlight assembly LH connector.
2. Disconnect the 4F instrument panel junction block 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
   A17-1 (B) - 4F-5	Always	Below 1 Ω
   A17-4 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   A17-1 (B) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  17

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [12/2013 - ]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4D-8 - 4F-5	Always	Below 1 Ω

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

1. Confirm the vehicle type.

   Result	Proceed to
   w/ Seat Position Memory	A
   w/o Seat Position Memory	B

Result: 

B 

See step  22

Result: 

A 

See step  19

1. Disconnect the I2 outer mirror control ECU assembly LH connector.
2. Disconnect the 4D instrument panel junction block 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
   I2-11 (TRNI) - 4D-20	Always	Below 1 Ω
   I2-7 (GND) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   4D-20 - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  20

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [12/2013 - ]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Instrument Panel Junction Block Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4D-8 - 4D-20	Always	Below 1 Ω

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result: 

OK 

See step  21

1. Replace the outer mirror control ECU assembly LH with a new or known good one.

   Refer to REMOVAL [12/2013 - ]

2. Check for the DTCs.

   Refer to DTC CHECK / CLEAR [12/2013 - ]

   Body Electrical > Combination Meter > Trouble Codes 

   Result	Proceed to
   DTCs are output.	A
   DTCs are not output.	B

Result: 

A 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result: 

B 

END 

1. Disconnect the I1 side turn signal light assembly LH connector.
2. Disconnect the 4D instrument panel junction block 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
   I1-4 (B) - 4D-20	Always	Below 1 Ω
   I1-9 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   4D-20 - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  23

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [12/2013 - ]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Instrument Panel Junction Block Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4D-8 - 4D-20	Always	Below 1 Ω

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

1. Disconnect the M30 rear combination light assembly LH connector.
2. Disconnect the 4H instrument panel junction block 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
   M30-4 (B) - 4H-7	Always	Below 1 Ω
   M30-6 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   4H-7 - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  25

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [12/2013 - ]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4D-8 - 4H-7	Always	Below 1 Ω

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [12/2013 - ]