Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028DBD
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: LIGHTING (INT): LIGHTING SYSTEM: Rear Door Courtesy Switch Circuit; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]

Rear Door Courtesy Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects the condition of the rear 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

RR Door Courtesy Switch Status

Rear door courtesy light switch assembly (for RH) signal

Close or Open

Close: Rear door RH closed

Open: Rear door RH open

-

RL Door Courtesy Switch Status

Rear door courtesy light switch assembly (for LH) signal

Close or Open

Close: Rear door LH closed

Open: Rear door LH open

-

Body Electrical > Main Body > Data List

Tester Display

RR Door Courtesy Switch Status

RL Door Courtesy Switch Status

OK:

Normal conditions listed above are displayed.

Result

Proceed to

OK

A

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

B

NG ("RR Door Courtesy Switch Status" 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 REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

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

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

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

NG

REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LH

for Hatchback: Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; LIGHTING (INT): REAR DOOR COURTESY SWITCH (for Hatchback): REMOVAL

for Sedan: Click here 2021 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [04/2020 -        ]; LIGHTING (INT): REAR DOOR COURTESY SWITCH (for Sedan): REMOVAL

OK

3.

CHECK HARNESS AND CONNECTOR (REAR 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

O31-1 - 8H-18

Always

Below 1 Ω

O31-1 or 8H-18 - 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-18 - MB-6 (LCTY)

Always

Below 1 Ω
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

5.

INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

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

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

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

NG

REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RH

for Hatchback: Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; LIGHTING (INT): REAR DOOR COURTESY SWITCH (for Hatchback): REMOVAL

for Sedan: Click here 2021 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [04/2020 -        ]; LIGHTING (INT): REAR DOOR COURTESY SWITCH (for Sedan): REMOVAL

OK

6.

CHECK HARNESS AND CONNECTOR (REAR 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

O34-1 - 8H-27

Always

Below 1 Ω

O34-1 or 8H-27 - 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-27 - MB-1 (RCTY)

Always

Below 1 Ω
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY