Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000002579B
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for 12.3 Inch Display): B150819; Turn Signal/Hazard Flasher Circuit Current Above Threshold; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]

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, all of the turn signal lights in that circuit will not blink.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

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 assembly
  • Rear Combination Light Assembly
  • Outer rear view mirror assembly
  • Side turn signal light assembly
  • Harness or connector
  • Combination meter assembly

WIRING DIAGRAM

LH SIDE

RH SIDE

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, 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

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 (HEADLIGHT ASSEMBLY LH)

(a) Disconnect the A170 headlight assembly LH connector.

(b) 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.

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

3.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - COMBINATION METER ASSEMBLY)

(a) Disconnect the I5 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A170-6 (B) or I5-5 (LL) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK LH SIDE LIGHTS (REAR COMBINATION LIGHT ASSEMBLY LH)

(a) Connect the A170 headlight assembly LH connector.

(b) Connect the I5 combination meter assembly connector.

(c) Disconnect the O43 rear combination light assembly LH connector.

(d) 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.

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 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Hatchback): REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Hatchback): REMOVAL

B

5.

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

(a) Connect the O43 rear combination light assembly LH connector.

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

(c) 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.

Result

Proceed to

LH side turn signal lights blink

A

LH side turn signal lights do not blink

B
B

GO TO STEP 7

A

6.

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

7.

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

(a) Disconnect the O43 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:

Tester Connection

Condition

Specified Condition

O43-4 (B), L9-5 (B) or I5-22 (TRNL) - Body ground

Always

10 kΩ or higher
OK

REPLACE COMBINATION METER ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

CHECK RH SIDE LIGHTS (HEADLIGHT ASSEMBLY RH)

(a) Disconnect the A171 headlight assembly RH connector.

(b) 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.

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

9.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - COMBINATION METER ASSEMBLY)

(a) Disconnect the I5 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A171-6 (B) or I5-6 (LR) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

10.

CHECK RH SIDE LIGHTS (REAR COMBINATION LIGHT ASSEMBLY RH)

(a) Connect the A171 headlight assembly RH connector.

(b) Connect the I5 combination meter assembly connector.

(c) Disconnect the O42 rear combination light assembly RH connector.

(d) 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.

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 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Hatchback): REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Hatchback): REMOVAL

B

11.

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

(a) Connect the O42 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.

Result

Proceed to

RH side turn signal lights blink

A

RH side turn signal lights do not blink

B
B

GO TO STEP 13

A

12.

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

13.

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

(a) Disconnect the O42 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:

Tester Connection

Condition

Specified Condition

O42-4 (B), K10-5 (B) or G158-21 (TRNR) - Body ground

Always

10 kΩ or higher
OK

REPLACE COMBINATION METER ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR