Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001I0V1
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [03/2019 - 09/2022]
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for Gasoline Model): B150718; Turn Signal Light Circuit Current Below Threshold; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2022]

DTC

B150718

Turn Signal Light Circuit Current Below Threshold

DESCRIPTION

This DTC is stored when the combination meter assembly detects an open in a front turn signal light circuit or rear turn signal light circuit.

HINT:

  • If there is an open in a front turn signal light circuit or rear turn signal light circuit, the turn signal lights on the side with the open circuit will blink faster than usual.
  • If there is an open in a side turn signal light circuit, DTC B150718 will not be stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B150718

Turn Signal Light Circuit Current Below Threshold

Diagnosis Condition:

  • Battery voltage is 10 V or more

Malfunction Status:

  • Open in front turn signal light circuit
  • Open in rear turn signal light circuit
  • Harness or connector
  • Combination meter assembly

for TMC Made

  • Headlight ECU sub-assembly*1
  • Headlight unit assembly*2
  • Front turn signal light socket*3
  • Front turn signal light bulb*3
  • Rear combination light cord
  • Rear combination light LED LH*4
  • Rear combination light LED RH*4
  • Rear turn signal light bulb*5

for TMMMS Made

  • Headlight assembly*2
  • Front turn signal light socket*3
  • Front turn signal light bulb*3
  • Rear combination light cord
  • Rear turn signal light bulb
  • *1: w/ AFS
  • *2: for LED Type Front Turn Signal Light
  • *3: for Bulb Type Front Turn Signal Light
  • *4: for LED Type Rear Turn Signal Light
  • *5: for Bulb Type Rear Turn Signal Light

WIRING DIAGRAM

FOR TMC MADE

FOR TMMMS MADE

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 headlight ECU sub-assembly LH, always replace it with a new one. If a headlight ECU sub-assembly LH 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.
    • *: w/ AFS

PROCEDURE

1.

CHECK SYMPTOMS

(a) Check the problem symptoms.

Result

Proceed to

LH side front turn signal light does not blink

A

LH side rear turn signal light does not blink

B

RH side front turn signal light does not blink

C

RH side rear turn signal light does not blink

D

B

GO TO STEP 14

C

GO TO STEP 20

D

GO TO STEP 32

A

2.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

Specifications

Front Turn Signal Light

for TMC Made

LED Type

(w/ AFS)

A

LED Type

(w/o AFS)

B

Bulb Type

C

for TMMMS Made

LED Type

D

Bulb Type

E

B

GO TO STEP 7

C

GO TO STEP 8

D

GO TO STEP 10

E

GO TO STEP 12

A

3.

INSPECT HEADLIGHT CORD (HEADLIGHT UNIT ASSEMBLY LH)

*1

Headlight Cord (Headlight Unit Assembly LH)

-

-

*a

Component without harness connected

(Headlight ECU Sub-assembly LH)

*b

Component without harness connected

(to Wire Harness)

(a) Disconnect the B, A21 and A23 headlight cord (headlight unit assembly LH) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

B-11 (ECUB) - A21-1 (TNS)

Always

Below 1 Ω

B-12 (GND) - A23-4 (GND)

Always

Below 1 Ω

NG

REPLACE HEADLIGHT UNIT ASSEMBLY LH

OK

4.

INSPECT HEADLIGHT ECU SUB-ASSEMBLY LH

*a

Component without harness connected

(Headlight ECU Sub-assembly LH)

-

-

(a) Remove the headlight ECU sub-assembly LH.

Click here 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C-20 (TURN+) - B-11 (ECUB)

Always

Below 1 Ω

C-13 (TURN-) - B-12 (GND)

Always

Below 1 Ω

NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

OK

5.

CHECK LH SIDE FRONT TURN SIGNAL LIGHT (TURN SIGNAL LIGHT (HEADLIGHT UNIT ASSEMBLY LH))

(a) Interchange the turn signal light (headlight unit assembly) LH with RH and connect the connectors.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

(b) Connect the headlight cord (headlight unit assembly LH) connectors.

(c) Connect the headlight ECU sub-assembly LH connectors.

(d) Operate the turn signal switch and check that the LH side front turn signal light operates normally.

HINT:

If the LH side front turn signal light operates normally, the turn signal light (headlight unit assembly LH) is malfunctioning.

Result

Proceed to

LH side front turn signal light operates normally

A

Problem symptoms do not change

(LH side front turn signal light does not blink)

B

A

REPLACE HEADLIGHT UNIT ASSEMBLY LH

B

6.

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

(a) Disconnect the A21 and A23 headlight 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

A21-1 (TNS) - I5-1 (LL)

Always

Below 1 Ω

A23-4 (GND) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.

CHECK LH SIDE FRONT TURN SIGNAL LIGHT (HEADLIGHT UNIT ASSEMBLY LH)

(a) Interchange the headlight unit assembly LH with RH and connect the connectors.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

(b) Operate the turn signal switch and check that the LH side front turn signal light operates normally.

HINT:

If the LH side front turn signal light operates normally, the headlight unit assembly LH is malfunctioning.

Result

Proceed to

LH side front turn signal light operates normally

A

Problem symptoms do not change

(LH side front turn signal light does not blink)

B

A

REPLACE HEADLIGHT UNIT ASSEMBLY LH

B

GO TO STEP 11

8.

CHECK LH SIDE FRONT TURN SIGNAL LIGHT (FRONT TURN SIGNAL LIGHT SOCKET LH)

(a) Interchange the front turn signal light socket LH with RH and connect the connectors.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

(b) Operate the turn signal switch and check that the LH side front turn signal light operates normally.

HINT:

If the LH side front turn signal light operates normally, the front turn signal light socket LH is malfunctioning.

Result

Proceed to

LH side front turn signal light operates normally

A

Problem symptoms do not change

(LH side front turn signal light does not blink)

B

A

REPLACE FRONT TURN SIGNAL LIGHT SOCKET LH

B

9.

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

(a) Disconnect the A90 headlight 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

A90-1 (B) - I5-1 (LL)

Always

Below 1 Ω

A90-2 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.

CHECK LH SIDE FRONT TURN SIGNAL LIGHT (HEADLIGHT ASSEMBLY LH)

(a) Interchange the headlight assembly LH with RH and connect the connectors.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: REMOVAL

(b) Operate the turn signal switch and check that the LH side front turn signal light operates normally.

HINT:

If the LH side front turn signal light operates normally, the headlight assembly LH is malfunctioning.

Result

Proceed to

LH side front turn signal light operates normally

A

Problem symptoms do not change

(LH side front turn signal light does not blink)

B

A

REPLACE HEADLIGHT ASSEMBLY LH

B

11.

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

(a) Disconnect the A83 headlight 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

A83-2 (B) - I5-1 (LL)

Always

Below 1 Ω

A83-3 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.

CHECK LH SIDE FRONT TURN SIGNAL LIGHT (FRONT TURN SIGNAL LIGHT SOCKET LH)

(a) Interchange the front turn signal light socket LH with RH and connect the connectors.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

(b) Operate the turn signal switch and check that the LH side front turn signal light operates normally.

HINT:

If the LH side front turn signal light operates normally, the front turn signal light socket LH is malfunctioning.

Result

Proceed to

LH side front turn signal light operates normally

A

Problem symptoms do not change

(LH side front turn signal light does not blink)

B

A

REPLACE FRONT TURN SIGNAL LIGHT SOCKET LH

B

13.

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

(a) Disconnect the A122 headlight 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

A122-1 (B) - I5-1 (LL)

Always

Below 1 Ω

A122-3 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

14.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for Bulb Type Rear Turn Signal Light

A

for LED Type Rear Turn Signal Light

B

B

GO TO STEP 17

A

15.

CHECK LH SIDE REAR TURN SIGNAL LIGHT (REAR COMBINATION LIGHT CORD LH)

(a) Interchange the rear combination light cord LH with RH and connect the connectors.

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

(b) Operate the turn signal switch and check that the LH side rear turn signal light operates normally.

HINT:

If the LH side rear turn signal lights operates normally, the rear combination light cord LH is malfunctioning.

Result

Proceed to

LH side rear turn signal lights operates normally

A

Problem symptoms do not change

(LH side rear turn signal light does not blink)

B

A

REPLACE REAR COMBINATION LIGHT CORD LH

B

16.

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

(a) Disconnect the O104 rear 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

O104-3 (B) - I5-5 (TRNL)

Always

Below 1 Ω

O104-4 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

17.

CHECK LH SIDE REAR TURN SIGNAL LIGHT (REAR COMBINATION LIGHT ASSEMBLY LH)

(a) Interchange the rear combination light assembly LH with RH and connect the connectors.

Click here 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Hatchback): REMOVAL

(b) Operate the turn signal switch and check that the LH side rear turn signal light operates normally.

HINT:

If the LH side rear turn signal lights operates normally, a component of the rear combination light assembly LH is malfunctioning.

Result

Proceed to

LH side rear turn signal lights operates normally

A

Problem symptoms do not change

(LH side rear turn signal light does not blink)

B

B

GO TO STEP 19

A

18.

INSPECT REAR COMBINATION LIGHT LED LH

(a) Remove the rear combination light LED LH from rear combination light assembly LH.

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Hatchback): DISASSEMBLY

(b) Inspect the rear combination light LED LH.

Click here 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Hatchback): INSPECTION

OK

REPLACE REAR COMBINATION LIGHT CORD LH

NG

REPLACE REAR COMBINATION LIGHT LED LH

19.

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

(a) Disconnect the O43 rear 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) - I5-5 (TRNL)

Always

Below 1 Ω

O43-3 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

20.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

Specifications

Front Turn Signal Light

for TMC Made

LED Type

(w/ AFS)

A

LED Type

(w/o AFS)

B

Bulb Type

C

for TMMMS Made

LED Type

D

Bulb Type

E

B

GO TO STEP 25

C

GO TO STEP 26

D

GO TO STEP 28

E

GO TO STEP 30

A

21.

INSPECT HEADLIGHT CORD (HEADLIGHT UNIT ASSEMBLY RH)

*1

Headlight Cord (Headlight Unit Assembly RH)

-

-

*a

Component without harness connected

(Headlight ECU Sub-assembly RH)

*b

Component without harness connected

(to Wire Harness)

(a) Disconnect the D, A20 and A22 headlight cord (headlight unit assembly RH) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D-11 (ECUB) - A20-1 (TNS)

Always

Below 1 Ω

D-12 (GND) - A22-4 (GND)

Always

Below 1 Ω

NG

REPLACE HEADLIGHT UNIT ASSEMBLY RH

OK

22.

INSPECT HEADLIGHT ECU SUB-ASSEMBLY RH

*a

Component without harness connected

(Headlight ECU Sub-assembly RH)

-

-

(a) Remove the headlight ECU sub-assembly RH.

Click here 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

E-20 (TURN+) - D-11 (ECUB)

Always

Below 1 Ω

E-13 (TURN-) - D-12 (GND)

Always

Below 1 Ω

NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

OK

23.

CHECK RH SIDE FRONT TURN SIGNAL LIGHT (TURN SIGNAL LIGHT (HEADLIGHT UNIT ASSEMBLY RH))

(a) Interchange the turn signal light (headlight unit assembly) RH with LH and connect the connectors.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

(b) Connect the headlight cord (headlight unit assembly RH) connectors.

(c) Connect the headlight ECU sub-assembly RH connectors.

(d) Operate the turn signal switch and check that the RH side front turn signal light operates normally.

HINT:

If the RH side front turn signal light operates normally, the turn signal light (headlight unit assembly RH) is malfunctioning.

Result

Proceed to

RH side front turn signal light operates normally

A

Problem symptoms do not change

(RH side front turn signal light does not blink)

B

A

REPLACE HEADLIGHT UNIT ASSEMBLY RH

B

24.

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

(a) Disconnect the A20 and A22 headlight 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

A20-1 (TNS) - I5-2 (LR)

Always

Below 1 Ω

A22-4 (GND) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

25.

CHECK RH SIDE FRONT TURN SIGNAL LIGHT (HEADLIGHT UNIT ASSEMBLY RH)

(a) Interchange the headlight unit assembly RH with LH and connect the connectors.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: REMOVAL

(b) Operate the turn signal switch and check that the RH side front turn signal light operates normally.

HINT:

If the RH side front turn signal light operates normally, the headlight unit assembly RH is malfunctioning.

Result

Proceed to

RH side front turn signal light operates normally

A

Problem symptoms do not change

(RH side front turn signal light does not blink)

B

A

REPLACE HEADLIGHT UNIT ASSEMBLY RH

B

GO TO STEP 29

26.

CHECK RH SIDE FRONT TURN SIGNAL LIGHT (FRONT TURN SIGNAL LIGHT SOCKET RH)

(a) Interchange the front turn signal light socket RH with LH and connect the connectors.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

(b) Operate the turn signal switch and check that the RH side front turn signal light operates normally.

HINT:

If the RH side front turn signal light operates normally, the front turn signal light socket RH is malfunctioning.

Result

Proceed to

RH side front turn signal light operates normally

A

Problem symptoms do not change

(RH side front turn signal light does not blink)

B

A

REPLACE FRONT TURN SIGNAL LIGHT SOCKET RH

B

27.

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

(a) Disconnect the A87 headlight 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

A87-1 (B) - I5-2 (LR)

Always

Below 1 Ω

A87-2 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

28.

CHECK RH SIDE FRONT TURN SIGNAL LIGHT (HEADLIGHT ASSEMBLY RH)

(a) Interchange the headlight assembly RH with LH and connect the connectors.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: REMOVAL

(b) Operate the turn signal switch and check that the RH side front turn signal light operates normally.

HINT:

If the RH side front turn signal light operates normally, the headlight assembly RH is malfunctioning.

Result

Proceed to

RH side front turn signal light operates normally

A

Problem symptoms do not change

(RH side front turn signal light does not blink)

B

A

REPLACE HEADLIGHT ASSEMBLY RH

B

29.

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

(a) Disconnect the A82 headlight 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

A82-2 (B) - I5-2 (LR)

Always

Below 1 Ω

A82-3 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

30.

CHECK RH SIDE FRONT TURN SIGNAL LIGHT (FRONT TURN SIGNAL LIGHT SOCKET RH)

(a) Interchange the front turn signal light socket RH with LH and connect the connectors.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

(b) Operate the turn signal switch and check that the RH side front turn signal light operates normally.

HINT:

If the RH side front turn signal light operates normally, the front turn signal light socket RH is malfunctioning.

Result

Proceed to

RH side front turn signal light operates normally

A

Problem symptoms do not change

(RH side front turn signal light does not blink)

B

A

REPLACE FRONT TURN SIGNAL LIGHT SOCKET RH

B

31.

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

(a) Disconnect the A121 headlight 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

A121-1 (B) - I5-2 (LR)

Always

Below 1 Ω

A121-3 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

32.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for Bulb Type Rear Turn Signal Light

A

for LED Type Rear Turn Signal Light

B

B

GO TO STEP 35

A

33.

CHECK RH SIDE REAR TURN SIGNAL LIGHT (REAR COMBINATION LIGHT CORD RH)

(a) Interchange the rear combination light cord RH with LH and connect the connectors.

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

(b) Operate the turn signal switch and check that the RH side rear turn signal light operates normally.

HINT:

If the RH side rear turn signal lights operates normally, the rear combination light cord RH is malfunctioning.

Result

Proceed to

RH side rear turn signal lights operates normally

A

Problem symptoms do not change

(RH side rear turn signal light does not blink)

B

A

REPLACE REAR COMBINATION LIGHT CORD RH

B

34.

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

(a) Disconnect the O103 rear 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

O103-3 (B) - I5-6 (TRNR)

Always

Below 1 Ω

O103-4 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

35.

CHECK RH SIDE REAR TURN SIGNAL LIGHT (REAR COMBINATION LIGHT ASSEMBLY RH)

(a) Interchange the rear combination light assembly RH with LH and connect the connectors.

Click here 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Hatchback): REMOVAL

(b) Operate the turn signal switch and check that the RH side rear turn signal light operates normally.

HINT:

If the RH side rear turn signal lights operates normally, a component of the rear combination light assembly RH is malfunctioning.

Result

Proceed to

RH side rear turn signal lights operates normally

A

Problem symptoms do not change

(RH side rear turn signal light does not blink)

B

B

GO TO STEP 37

A

36.

INSPECT REAR COMBINATION LIGHT LED RH

(a) Remove the rear combination light LED RH from rear combination light assembly RH.

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Hatchback): DISASSEMBLY

(b) Inspect the rear combination light LED RH.

Click here 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; LIGHTING (EXT): REAR COMBINATION LIGHT ASSEMBLY (for Hatchback): INSPECTION

OK

REPLACE REAR COMBINATION LIGHT CORD RH

NG

REPLACE REAR COMBINATION LIGHT LED RH

37.

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

(a) Disconnect the O42 rear 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) - I5-6 (TRNR)

Always

Below 1 Ω

O42-3 (E) - Body ground

Always

Below 1 Ω

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR