Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028HAJ
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (except 12.3 Inch Display): B150819; Turn Signal/Hazard Flasher Circuit Current Above Threshold; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]

DTC

B150819

Turn Signal/Hazard Flasher Circuit Current Above Threshold

DESCRIPTION

This DTC is stored when the combination meter assembly detects a short in a turn signal light circuit.

HINT:

If there is a short in a turn signal light circuit, the turn signal lights on the side with the short circuit will blink faster than usual.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

Priority

B150819

Turn Signal/Hazard Flasher Circuit Current Above Threshold

Diagnosis Condition:

  • Auxiliary battery voltage is 10 V or more

Malfunction Status:

  • Short in turn signal light circuit
  • Headlight unit assembly
  • Rear Combination Light Assembly
  • Rear turn signal light LED
  • Outer rear view mirror assembly
  • Side turn signal light assembly
  • Harness or connector
  • Combination meter assembly

Combination Meter

A

WIRING DIAGRAM

LH SIDE
RH SIDE

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing any of the following ECUs, always replace it with a new one. If any of the following ECUs is replaced with one which was installed to another vehicle, the information stored in it will not match the information from the vehicle and a DTC may be stored.
  • When replacing the combination meter assembly, update the ECU security key.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: UPDATE ECU SECURITY KEY

  • Inspect the turn signal light bulbs before performing the following procedure.

PROCEDURE

1.

CHECK LIGHTS

(a) Inspect the illumination of each turn signal light.

Result

Proceed to

All LH turn signal lights do not blink

A

All RH turn signal lights do not blink

B
B

GO TO STEP 8

A

2.

CHECK LH SIDE LIGHTS (REAR COMBINATION LIGHT ASSEMBLY LH)

(a) Disconnect the O104*1, O43*2 rear combination light assembly LH connector.

(b) Operate the headlight dimmer switch assembly and check that the LH side turn signal lights other than the rear turn signal light blink.

HINT:

If the LH side turn signal lights blink, the rear light assembly LH is malfunctioning.

  • *1: for Sedan
  • *2: for Hatchback

Result

Proceed to

LH side turn signal lights blink

A

LH side turn signal lights do not blink

B
A

REPLACE REAR COMBINATION LIGHT ASSEMBLY LH

for Hatchback: Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Hatchback): REMOVAL

for Sedan: Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 -        ]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Sedan): REMOVAL

B

3.

CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY)

(a) Disconnect the O104*1, O43*2 combination light assembly LH connector.

(b) Disconnect the I5 combination meter assembly connector.

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

Standard Resistance (for Sedan):

Tester Connection

Condition

Specified Condition

O104-3 (B) or I5-22 (TRNL) - Body ground

Always

10 kΩ or higher

Standard Resistance (for Hatchback):

Tester Connection

Condition

Specified Condition

O43-4 (B) or I5-22 (TRNL) - Body ground

Always

10 kΩ or higher
  • *1: for Sedan
  • *2: for Hatchback
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK LH SIDE LIGHTS (OUTER REAR VIEW MIRROR ASSEMBLY LH)

(a) Connect the O104*1, O43*2 rear combination light assembly LH connector.

(b) Connect the I5 combination meter assembly connector.

(c) Disconnect the L9 outer rear view mirror assembly LH connector.

(d) Operate the headlight dimmer switch assembly and check that the LH side turn signal lights other than the side turn signal light blink.

HINT:

If the LH side turn signal lights blink, the outer rear view mirror assembly LH is malfunctioning.

  • *1: for Sedan
  • *2: for Hatchback

Result

Proceed to

LH side turn signal lights blink

A

LH side turn signal lights do not blink

B
B

GO TO STEP 6

A

5.

INSPECT SIDE TURN SIGNAL LIGHT ASSEMBLY LH

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; LIGHTING (EXT): SIDE TURN SIGNAL LIGHT ASSEMBLY: INSPECTION

OK

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

NG

REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY LH

6.

CHECK LH SIDE LIGHTS (HEADLIGHT ASSEMBLY LH)

(a) Connect the L9 outer rear view mirror assembly LH connector.

(b) Disconnect the A131*1, A134*2 headlight assembly LH connector.

(c) Operate the headlight dimmer switch assembly and check that the LH side turn signal lights other than the headlight turn signal light blink.

HINT:

If the LH side turn signal lights blink, the headlight assembly LH is malfunctioning.

  • *1: for LED Type Front Turn Signal Light
  • *2: for Bulb Type Front Turn Signal Light

Result

Proceed to

LH side turn signal lights blink

A

LH side turn signal lights do not blink

B
A

REPLACE HEADLIGHT ASSEMBLY LH

B

7.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH AND OUTER REAR VIEW MIRROR ASSEMBLY LH - COMBINATION METER ASSEMBLY)

(a) Disconnect the I5 combination meter assembly connector.

(b) Disconnect the L9 outer rear view mirror assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A131-6 (B)*1, A134-1 (B)*2, L9-5 (B) or I5-5 (LL) - Body ground

Always

10 kΩ or higher
  • *1: for LED Type Front Turn Signal Light
  • *2: for Bulb Type Front Turn Signal Light
OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

CHECK RH SIDE LIGHTS (REAR COMBINATION LIGHT ASSEMBLY RH)

(a) Disconnect the O103*1, O42*2 rear combination light assembly RH connector.

(b) Operate the headlight dimmer switch assembly and check that the RH side turn signal lights other than the rear turn signal light blink.

HINT:

If the RH side turn signal lights blink, the rear light assembly RH is malfunctioning.

  • *1: for Sedan
  • *2: for Hatchback

Result

Proceed to

RH side turn signal lights blink

A

RH side turn signal lights do not blink

B
A

REPLACE REAR COMBINATION LIGHT ASSEMBLY RH

for Hatchback: Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Hatchback): REMOVAL

for Sedan: Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 -        ]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Sedan): REMOVAL

B

9.

CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY)

(a) Disconnect the O103*1, O42*2 combination light assembly RH connector.

(b) Disconnect the I5 combination meter assembly connector.

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

Standard Resistance (for Sedan):

Tester Connection

Condition

Specified Condition

O103-3 (B) or I5-21 (TRNR) - Body ground

Always

10 kΩ or higher

Standard Resistance (for Hatchback):

Tester Connection

Condition

Specified Condition

O42-4 (B) or I5-21 (TRNR) - Body ground

Always

10 kΩ or higher
  • *1: for Sedan
  • *2: for Hatchback
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

10.

CHECK RH SIDE LIGHTS (OUTER REAR VIEW MIRROR ASSEMBLY RH)

(a) Connect the O103*1, O42*2 rear combination light assembly RH connector.

(b) Connect the I5 combination meter assembly connector.

(c) Disconnect the K10 outer rear view mirror assembly RH connector.

(d) Operate the headlight dimmer switch assembly and check that the RH side turn signal lights other than the side turn signal light blink.

HINT:

If the RH side turn signal lights blink, the outer rear view mirror assembly RH is malfunctioning.

  • *1: for Sedan
  • *2: for Hatchback

Result

Proceed to

RH side turn signal lights blink

A

RH side turn signal lights do not blink

B
B

GO TO STEP 12

A

11.

INSPECT SIDE TURN SIGNAL LIGHT ASSEMBLY RH

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; LIGHTING (EXT): SIDE TURN SIGNAL LIGHT ASSEMBLY: INSPECTION

OK

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

NG

REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY RH

12.

CHECK RH SIDE LIGHTS (HEADLIGHT ASSEMBLY RH)

(a) Connect the K10 outer rear view mirror assembly RH connector.

(b) Disconnect the A133*1, A132*2 headlight assembly RH connector.

(c) Operate the headlight dimmer switch assembly and check that the RH side turn signal lights other than the headlight turn signal light blink.

HINT:

If the RH side turn signal lights blink, the headlight assembly RH is malfunctioning.

  • *1: for LED Type Front Turn Signal Light
  • *2: for Bulb Type Front Turn Signal Light

Result

Proceed to

RH side turn signal lights blink

A

RH side turn signal lights do not blink

B
A

REPLACE HEADLIGHT ASSEMBLY RH

B

13.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH AND OUTER REAR VIEW MIRROR ASSEMBLY RH - COMBINATION METER ASSEMBLY)

(a) Disconnect the I5 combination meter assembly connector.

(b) Disconnect the K10 outer rear view mirror assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A133-6 (B)*1, A132-1 (B)*2, K10-5 (B) or I5-6 (LR) - Body ground

Always

10 kΩ or higher
  • *1: for LED Type Front Turn Signal Light
  • *2: for Bulb Type Front Turn Signal Light
OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR