Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001G708
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for HV Model): B150819; Turn Signal/Hazard Flasher Circuit Current Above Threshold; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 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 unit assembly
  • Outer rear view mirror assembly*
  • Side turn signal light assembly*
  • Rear combination light cord
  • Rear turn signal light bulb
  • Harness or connector
  • Combination meter assembly
  • *: w/ Side Turn Signal Light

WIRING DIAGRAM

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

PROCEDURE

1.

CHECK SYMPTOMS

(a) Check the problem symptoms.

Result

Proceed to

All LH side turn signal lights do not blink

A

All RH side turn signal lights do not blink

B
B

GO TO STEP 7

A

2.

CHECK LH SIDE TURN SIGNAL LIGHTS (FRONT TURN SIGNAL LIGHT CIRCUIT)

(a) Disconnect the A83 headlight assembly LH connector.

(b) Operate the turn signal switch and check that the LH side turn signal lights other than the front turn signal light blink.

HINT:

If the LH side turn signal lights other than the front turn signal light blink, the headlight unit assembly LH is malfunctioning.

Result

Proceed to

LH side turn signal lights other than the front turn signal light blink

A

Problem symptoms do not change

(All LH side turn signal lights do not blink)

(w/ Side Turn Signal Light)

B

Problem symptoms do not change

(All LH side turn signal lights do not blink)

(w/o Side Turn Signal Light)

C
A

REPLACE HEADLIGHT UNIT ASSEMBLY LH 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

C

GO TO STEP 5

B

3.

CHECK LH SIDE TURN SIGNAL LIGHTS (SIDE TURN SIGNAL LIGHT CIRCUIT)

(a) Connect the headlight assembly LH connector.

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

(c) Operate the turn signal switch 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 other than the side turn signal light blink, a component of the outer rear view mirror assembly LH is malfunctioning.

Result

Proceed to

LH side turn signal lights other than the side turn signal light blink

A

Problem symptoms do not change

(All LH side turn signal lights do not blink)

B
B

GO TO STEP 5

A

4.

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

(a) Remove the side turn signal light assembly LH from outer rear view mirror assembly LH.

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

(b) Connect the wire harness connector to the outer rear view mirror assembly LH connector.

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

HINT:

If all LH side turn signal lights do not blink, the outer rear view mirror assembly LH is malfunctioning.

Result

Proceed to

LH side turn signal lights other than the side turn signal light blink

A

All LH side turn signal lights do not blink

B
A

REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY LH

B

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

5.

CHECK LH SIDE TURN SIGNAL LIGHTS (REAR TURN SIGNAL LIGHT CIRCUIT)

(a) Connect the outer rear view mirror assembly LH connector.*1

(b) Connect the headlight assembly LH connector.*2

(c) Disconnect the O104 rear combination light assembly LH connector.

(d) Operate the turn signal switch 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 other than the rear turn signal light blink, the rear combination light cord LH is malfunctioning.

  • *1: w/ Side Turn Signal Light
  • *2: w/o Side Turn Signal Light

Result

Proceed to

LH side turn signal lights other than the rear turn signal light blink

A

Problem symptoms do not change

(All LH side turn signal lights do not blink)

B
A

REPLACE REAR COMBINATION LIGHT CORD LH 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Sedan): REMOVAL 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 -        ]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Sedan): REMOVAL

B

6.

CHECK HARNESS AND CONNECTOR (LH SIDE EACH PARTS - COMBINATION METER ASSEMBLY)

(a) Disconnect the A83 headlight assembly LH connector.

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

(c) Disconnect the I5 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A83-2 (B), L9-5 (B)* or I5-1 (LL) - Body ground

Always

10 kΩ or higher

O104-3 (B) or I5-5 (TRNL) - Body ground

Always

10 kΩ or higher
  • *: w/ Side Turn Signal Light
OK

REPLACE COMBINATION METER ASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

CHECK RH SIDE TURN SIGNAL LIGHTS (FRONT TURN SIGNAL LIGHT CIRCUIT)

(a) Disconnect the A82 headlight assembly RH connector.

(b) Operate the turn signal switch and check that the RH side turn signal lights other than the front turn signal light blink.

HINT:

If the RH side turn signal lights other than the front turn signal light blink, the headlight unit assembly RH is malfunctioning.

Result

Proceed to

RH side turn signal lights other than the front turn signal light blink

A

Problem symptoms do not change

(All RH side turn signal lights do not blink)

(w/ Side Turn Signal Light)

B

Problem symptoms do not change

(All RH side turn signal lights do not blink)

(w/o Side Turn Signal Light)

C
A

REPLACE HEADLIGHT UNIT ASSEMBLY RH 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

C

GO TO STEP 10

B

8.

CHECK RH SIDE TURN SIGNAL LIGHTS (SIDE TURN SIGNAL LIGHT CIRCUIT)

(a) Connect the headlight assembly RH connector.

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

(c) Operate the turn signal switch 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 other than the side turn signal light blink, a component of the outer rear view mirror assembly RH is malfunctioning.

Result

Proceed to

RH side turn signal lights other than the side turn signal light blink

A

Problem symptoms do not change

(All RH side turn signal lights do not blink)

B
B

GO TO STEP 10

A

9.

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

(a) Remove the side turn signal light assembly RH from outer rear view mirror assembly RH.

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

(b) Connect the wire harness connector to the outer rear view mirror assembly RH connector.

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

HINT:

If all RH side turn signal lights do not blink, the outer rear view mirror assembly RH is malfunctioning.

Result

Proceed to

RH side turn signal lights other than the side turn signal light blink

A

All RH side turn signal lights do not blink

B
A

REPLACE SIDE TURN SIGNAL LIGHT ASSEMBLY RH

B

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

10.

CHECK RH SIDE TURN SIGNAL LIGHTS (REAR TURN SIGNAL LIGHT CIRCUIT)

(a) Connect the outer rear view mirror assembly RH connector.*1

(b) Connect the headlight assembly RH connector.*2

(c) Disconnect the O103 rear combination light assembly RH connector.

(d) Operate the turn signal switch 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 other than the rear turn signal light blink, the rear combination light cord RH is malfunctioning.

  • *1: w/ Side Turn Signal Light
  • *2: w/o Side Turn Signal Light

Result

Proceed to

RH side turn signal lights other than the rear turn signal light blink

A

Problem symptoms do not change

(All RH side turn signal lights do not blink)

B
A

REPLACE REAR COMBINATION LIGHT CORD RH 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Sedan): REMOVAL 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 -        ]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Sedan): REMOVAL

B

11.

CHECK HARNESS AND CONNECTOR (RH SIDE EACH PARTS - COMBINATION METER ASSEMBLY)

(a) Disconnect the A82 headlight assembly RH connector.

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

(c) Disconnect the I5 combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A82-2 (B), K10-5 (B)* or I5-2 (LR) - Body ground

Always

10 kΩ or higher

O103-3 (B) or I5-6 (TRNR) - Body ground

Always

10 kΩ or higher
  • *: w/ Side Turn Signal Light
OK

REPLACE COMBINATION METER ASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; METER / GAUGE / DISPLAY: COMBINATION METER: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR