Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028DBC
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: LIGHTING (INT): LIGHTING SYSTEM: Front Door Courtesy Switch Circuit; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]

Front Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of the front door courtesy light switch assembly.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*

for Gasoline Model: Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): 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

  • *: w/ Smart Key System

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

FR Door Courtesy Switch Status

Front door courtesy light switch assembly (for RH) signal

Close or Open

Close: Front door RH closed

Open: Front door RH open

-

FL Door Courtesy Switch Status

Front door courtesy light switch assembly (for LH) signal

Close or Open

Close: Front door LH closed

Open: Front door LH open

-

Body Electrical > Main Body > Data List

Tester Display

FR Door Courtesy Switch Status

FL Door Courtesy Switch Status

OK:

Normal conditions listed above are displayed.

Result

Proceed to

OK

A

NG ("FL Door Courtesy Switch Status" is not normal)

B

NG ("FR Door Courtesy SW" is not normal)

C

A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - 03/2023]; LIGHTING (INT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2023 -        ]; LIGHTING (INT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE

C

GO TO STEP 5

B

2.

INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

(a) Inspect the front door courtesy light switch assembly LH.

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; LIGHTING (INT): FRONT DOOR COURTESY SWITCH: INSPECTION

NG

REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

OK

3.

CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH - POWER DISTRIBUTION BOX ASSEMBLY)

(a) Disconnect the 8H power distribution box assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O30-1 - 8H-23

Always

Below 1 Ω

O30-1 or 8H-23 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

INSPECT POWER DISTRIBUTION BOX ASSEMBLY

(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

8H-23 - MB-2 (FLCY)

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

5.

INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

(a) Inspect the front door courtesy light switch assembly RH.

Click here 2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; LIGHTING (INT): FRONT DOOR COURTESY SWITCH: INSPECTION

NG

REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

OK

6.

CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH - POWER DISTRIBUTION BOX ASSEMBLY)

(a) Disconnect the 8H power distribution box assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O32-1 - 8H-22

Always

Below 1 Ω

O32-1 or 8H-22 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

INSPECT POWER DISTRIBUTION BOX ASSEMBLY

(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

8H-22 - MB-4 (FRCY)

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY