Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM1000000025DLY
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: LIGHTING (EXT): LIGHTING SYSTEM (for TMC Made): High Beam Headlight Circuit; 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]

High Beam Headlight Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the high beam headlights.

WIRING DIAGRAM

for LED Type Turn Signal Light (for G16E-GTS)

for LED Type Turn Signal Light (for M20A-FKS, 2ZR-FXE)

for Bulb Type Turn Signal Light (for M20A-FKS)

for Bulb Type Turn Signal Light (for 2ZR-FXE)

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    for HV Model:Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

    for Gasoline Model:Click here 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function (Gasoline Model, except TMMMS Made)): REGISTRATION

  • First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CXPI communication malfunctions before troubleshooting this symptom.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; NETWORKING: CXPI COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for LED Type Turn Signal Light

A

for Bulb Type Turn Signal Light

B
B

GO TO STEP 3

A

2.

PERFORM ACTIVE TEST USING GTS

(a) Perform the Active Test according to the display on the GTS.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

High Beam Headlight

High beam headlights

OFF or ON

-

Body Electrical > Main Body > Active Test

Tester Display

High Beam Headlight

OK:

High beam headlights illuminate.

Result

Proceed to

OK

A

NG (LH side high beam headlight does not illuminate)

B

NG (RH side high beam headlight does not illuminate)

C
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

B

REPLACE HEADLIGHT ASSEMBLY LH

C

REPLACE HEADLIGHT ASSEMBLY LH

3.

PERFORM ACTIVE TEST USING GTS

(a) Perform the Active Test according to the display on the GTS.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

High Beam Headlight

High beam headlights

OFF or ON

-

Body Electrical > Main Body > Active Test

Tester Display

High Beam Headlight

OK:

High beam headlights illuminate.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

4.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for M20A-FKS

A

for 2ZR-FXE

B
B

GO TO STEP 8

A

5.

INSPECT DIM RELAY

(a) Remove the DIM relay.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 5

Voltage not applied between terminals 1 and 2

10 kΩ or higher

3 - 5

Voltage applied between terminals 1 and 2

Below 1 Ω
NG

REPLACE DIM RELAY
OK

6.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - DIM RELAY)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

1 (DIM relay) - Body ground

Always

11 to 14 V

5 (DIM relay)- Body ground

Always

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

CHECK HARNESS AND CONNECTOR (DIM RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the I85 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 (DIM relay) - I85-22 (DIM)

Always

Below 1 Ω

2 (DIM relay) or I85-22 (DIM) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

INSPECT H-LP HI RELAY

(a) Remove the H-LP HI relay.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 5

Voltage not applied between terminals 1 and 2

10 kΩ or higher

3 - 5

Voltage applied between terminals 1 and 2

Below 1 Ω
NG

REPLACE H-LP HI RELAY
OK

9.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - H-LP HI RELAY)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

1 (H-LP HI relay) - Body ground

Always

11 to 14 V

5 (H-LP HI relay)- Body ground

Always

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

10.

CHECK HARNESS AND CONNECTOR (DIM RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the I85 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 (H-LP HI relay) - I85-22 (DIM)

Always

Below 1 Ω

2 (H-LP HI relay) or I85-22 (DIM) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR