DTC B1508: Short in Turn Signal / Hazard Flasher Circuit [09/2016 - ]: Procedure

1. Inspect the illumination of each turn signal light.

   Result

   Result	Proceed to
   All LH turn signal lights do not blink	A
   All RH turn signal lights do not blink	B

Result: 

B 

See step  6

Result: 

A 

See step  2

1. Disconnect the P11 rear turn signal light assembly LH (rear turn signal light lens and body LH) connector.
2. Disconnect the I7 combination meter assembly (meter circuit plate) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P11-1 (B) or I7-13 (TRNL) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3A-5 or I7-12 (LL) - 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. Disconnect the A21 front turn signal light assembly LH connector.
2. Disconnect the 3F instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A21-1 (B) or 3F-6 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the resistance according to the value(s) in the table below.
   NOTE:

   Make sure to perform this step with the instrument panel junction block assembly installed to the vehicle.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3F-6 or 3A-5 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE). Refer to  DISASSEMBLY [09/2016 - ] 

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [09/2016 - 07/2020]  , or refer to  REMOVAL [07/2020 - ] 

1. Disconnect the P9 rear turn signal light assembly RH (rear turn signal light lens and body RH) connector.
2. Disconnect the I7 combination meter assembly (meter circuit plate) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P9-1 (B) or I7-7 (TRNR) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3A-4 or I7-6 (LR) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  8

1. Disconnect the A12 front turn signal light assembly RH connector.
2. Disconnect the 3F instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A12-1 (B) or 3F-8 - 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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the resistance according to the value(s) in the table below.
   NOTE:

   Make sure to perform this step with the instrument panel junction block assembly installed to the vehicle.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3F-8 or 3A-4 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY (METER CIRCUIT PLATE). Refer to  DISASSEMBLY [09/2016 - ] 

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [09/2016 - 07/2020]  , or refer to  REMOVAL [07/2020 - ]