DTC B1507-18: Turn Signal Light Circuit Current Below Threshold [11/2022 - ]: Procedure

1. Operate the turn signal switch and check the problem symptoms.

   Result

   Result	Proceed to
   Front turn signal light (LH side) does not blink	A
   Rear turn signal light (LH side) does not blink	B
   Front turn signal light (RH side) does not blink	C
   Rear turn signal light (RH side) does not blink	D

Result: 

B 

See step  4

Result: 

C 

See step  6

Result: 

D 

See step  8

Result: 

A 

See step  2

1. Disconnect the A131*1, A134*2 headlight assembly LH connector.
2. Disconnect the I5 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (LED Type Front Turn Signal Light)

   Tester Connection	Condition	Specified Condition
   A131-6 (B) - I5-5 (LL)	Always	Below 1 Ω
   A131-3 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (Bulb Type Front Turn Signal Light)

   Tester Connection	Condition	Specified Condition
   A134-1 (B) - I5-5 (LL)	Always	Below 1 Ω
   A134-2 (E) - Body ground*3	Always	Below 1 Ω
   A134-3 (E) - Body ground*4	Always	Below 1 Ω

   1. *1: for LED Type Front Turn Signal Light
   2. *2: for Bulb Type Front Turn Signal Light
   3. *3: for TMC Made Sedan
   4. *4: for TMMMS Made

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Remove the headlight assembly LH.

   HINT: 

   Refer to REMOVAL [09/2022 - ]

2. Remove the Headlight Assembly RH.

   HINT: 

   Refer to REMOVAL [09/2022 - ]

3. Interchange the Headlight Assembly LH with RH and connect the connectors.
4. Check the front turn signal light (LH side) operates normally.

   Result

   Result	Proceed to
   Problem symptoms do not change (Front turn signal light (LH side) does not blink)	A
   Front turn signal light (LH side) operates normally	B

Result: 

A 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [11/2022 - 09/2024] , or refer to REMOVAL [09/2024 - ]

Result: 

B 

REPLACE HEADLIGHT ASSEMBLY LH 

Refer to REMOVAL [09/2022 - ]

1. Disconnect the O104*1, O43*2 rear combination light assembly LH connector.
2. Disconnect the I5 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (for Sedan)

   Tester Connection	Condition	Specified Condition
   O104-3 (B) - I5-22 (TRNL)	Always	Below 1 Ω
   O104-4 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (for Hatchback)

   Tester Connection	Condition	Specified Condition
   O43-4 (B) - I5-22 (TRNL)	Always	Below 1 Ω
   O43-3 (E) - Body ground	Always	Below 1 Ω

   1. *1: for Sedan
   2. *2: for Hatchback

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

for Hatchback: Refer to INSPECTION [09/2022 - ]

for Sedan: Refer to INSPECTION [01/2019 - ]

Result

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [11/2022 - 09/2024] , or refer to REMOVAL [09/2024 - ]

Result: 

NG 

REPLACE REAR COMBINATION LIGHT ASSEMBLY LH 

for Hatchback: Refer to REMOVAL [11/2022 - ]

for Sedan: Refer to REMOVAL [03/2019 - ]

1. Disconnect the A133*1, A132*2 headlight assembly RH connector.
2. Disconnect the I5 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (for LED Type Front Turn Signal Light)

   Tester Connection	Condition	Specified Condition
   A133-6 (B) - I5-6 (LR)	Always	Below 1 Ω
   A133-3 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (for Bulb Type Front Turn Signal Light)

   Tester Connection	Condition	Specified Condition
   A132-1 (B) - I5-6 (LR)	Always	Below 1 Ω
   A132-2 (E) - Body ground*3	Always	Below 1 Ω
   A132-3 (E) - Body ground*4	Always	Below 1 Ω

   1. *1: for LED Type Front Turn Signal Light
   2. *2: for Bulb Type Front Turn Signal Light
   3. *3: for TMC Made Sedan
   4. *4: for TMMMS Made

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

1. Remove the headlight assembly RH.

   HINT: 

   Refer to REMOVAL [09/2022 - ]

2. Remove the Headlight Assembly LH.

   HINT: 

   Refer to REMOVAL [09/2022 - ]

3. Interchange the Headlight Assembly RH with LH and connect the connectors.
4. Check the front turn signal light (RH side) operates normally.

   Result

   Result	Proceed to
   Problem symptoms do not change (Front turn signal light (RH side) does not blink)	A
   Front turn signal light (RH side) operates normally	B

Result: 

A 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [11/2022 - 09/2024] , or refer to REMOVAL [09/2024 - ]

Result: 

B 

REPLACE HEADLIGHT ASSEMBLY RH 

Refer to REMOVAL [09/2022 - ]

1. Disconnect the O103*1, O42*2 rear combination light assembly RH connector.
2. Disconnect the I5 combination meter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (for Sedan)

   Tester Connection	Condition	Specified Condition
   O103-3 (B) - I5-21 (TRNR)	Always	Below 1 Ω
   O103-4 (E) - Body ground	Always	Below 1 Ω

   Standard Resistance (for Hatchback)

   Tester Connection	Condition	Specified Condition
   O42-4 (B) - I5-21 (TRNR)	Always	Below 1 Ω
   O42-3 (E) - Body ground	Always	Below 1 Ω

   1. *1: for Sedan
   2. *2: for Hatchback

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  9

for Hatchback: Refer to INSPECTION [09/2022 - ]

for Sedan: Refer to INSPECTION [01/2019 - ]

Result

Result: 

OK 

REPLACE COMBINATION METER ASSEMBLY 

Refer to REMOVAL [11/2022 - 09/2024] , or refer to REMOVAL [09/2024 - ]

Result: 

NG 

REPLACE REAR COMBINATION LIGHT ASSEMBLY RH 

for Hatchback: Refer to REMOVAL [11/2022 - ]

for Sedan: Refer to REMOVAL [03/2019 - ]