Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GXJT
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: LIGHTING (INT): LIGHTING SYSTEM (for HV Model): Front Door Courtesy Switch Circuit; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

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.

Click here 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) 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 SW

Front door courtesy light switch assembly RH signal

OFF or ON

OFF: Front door RH closed

ON: Front door RH open

-

FL Door Courtesy SW

Front door courtesy light switch assembly LH signal

OFF or ON

OFF: Front door LH closed

ON: Front door LH open

-

Body Electrical > Main Body > Data List

Tester Display

FR Door Courtesy SW

FL Door Courtesy SW

OK:

Normal conditions listed above are displayed.

Result

Proceed to

OK

A

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

B

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

C

A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 2020 MY Corolla Corolla HV [01/2019 - 04/2020]; LIGHTING (INT): LIGHTING SYSTEM (for HV Model): PROBLEM SYMPTOMS TABLE 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; LIGHTING (INT): LIGHTING SYSTEM (for HV Model): PROBLEM SYMPTOMS TABLE

C

GO TO STEP 4

B

2.

INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

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

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; LIGHTING (INT): FRONT DOOR COURTESY SWITCH: REMOVAL

(b) 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 - 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

O30-1 - I85-1 (FLCY)

Always

Below 1 Ω

O30-1 or I85-1 (FLCY) - Body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

INSPECT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

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

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; LIGHTING (INT): FRONT DOOR COURTESY SWITCH: REMOVAL

(b) 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

5.

CHECK HARNESS AND CONNECTOR (FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RH - 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

O32-1 - I85-6 (FRCY)

Always

Below 1 Ω

O32-1 or I85-6 (FRCY) - Body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR