Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028DY4
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]

All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder

DESCRIPTION

The main body ECU (multiplex network body ECU) receives door key cylinder lock or unlock switch signals from the front door lock with motor assembly (for driver door). The main body ECU (multiplex network body ECU) activates the door lock motor on each door according to these signals.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the main body ECU (multiplex network body ECU) is replaced, refer to the Smart Key System (for Start Function). *

*: w/ Smart Key System

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

PROCEDURE

1.

CHECK DOOR LOCK OPERATION

(a) Proceed to the next step according to the symptom if all the doors cannot be locked/unlocked.

Result

Proceed to

All doors cannot be locked/unlocked by using door key cylinder on driver door.

A

All doors cannot be locked/unlocked by using door key cylinder on front passenger door. (w/ Front Passenger Door Key Cylinder)

B

All doors cannot be locked/unlocked by using both driver door and front passenger door key cylinders. (w/ Front Passenger Door Key Cylinder)

C

B

GO TO STEP 5

C

REPLACE MULTIPLEX NETWORK BODY ECU

A

2.

READ VALUE USING GTS (DOOR LOCK/UNLOCK SWITCH STATUS BY A MECHANICAL KEY)

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

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Door Lock Switch Status by a Mechanical Key (D/P Door)

Driver door or front passenger door* key-linked switch lock signal

OFF or ON

OFF: Driver door or front passenger door* key cylinder not turned to lock position

ON: Driver door or front passenger door* key cylinder turned to lock position

-

Door Unlock Switch Status by a Mechanical Key (D Door)

Driver door key-linked switch unlock signal

OFF or ON

OFF: Driver door key cylinder not turned to unlock position

ON: Driver door key cylinder turned to unlock position

-

Body Electrical > Main Body > Data List

Tester Display

Door Lock Switch Status by a Mechanical Key (D/P Door)

Door Unlock Switch Status by a Mechanical Key (D Door)

  • *: w/ Front Passenger Door Key Cylinder

OK:

On the GTS screen, ON or OFF is displayed for each item according to the table above.

OK

REPLACE MULTIPLEX NETWORK BODY ECU

NG

3.

INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY (for Driver Door)

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; DOOR LOCK: FRONT DOOR LOCK: INSPECTION

NG

REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY (for Driver Door)

OK

4.

CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

(a) Disconnect the L4 front door lock with motor assembly LH connector.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

L4-7 (L) - I85-28 (L2)

Always

Below 1 Ω

L4-6 (UL) - I85-4 (UL3)

Always

Below 1 Ω

L4-10 (E) - Body ground

Always

Below 1 Ω

L4-7 (L) - Body ground

Always

10 kΩ or higher

I85-28 (L2) - Body ground

Always

10 kΩ or higher

L4-6 (UL) - Body ground

Always

10 kΩ or higher

I85-4 (UL3) - Body ground

Always

10 kΩ or higher

OK

REPLACE MULTIPLEX NETWORK BODY ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

READ VALUE USING GTS (DOOR LOCK/UNLOCK SWITCH STATUS BY A MECHANICAL KEY)

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

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Door Lock Switch Status by a Mechanical Key (D/P Door)

Driver door or front passenger door key-linked switch lock signal

OFF or ON

OFF: Driver door or front passenger door key cylinder not turned to lock position

ON: Driver door or front passenger door key cylinder turned to lock position

-

Door Unlock Switch Status by a Mechanical Key (P Door)

Front passenger door key-linked switch unlock signal

OFF or ON

OFF: Front passenger door key cylinder not turned to unlock position

ON: Front passenger door key cylinder turned to unlock position

-

Body Electrical > Main Body > Data List

Tester Display

Door Lock Switch Status by a Mechanical Key (D/P Door)

Door Unlock Switch Status by a Mechanical Key (P Door)

OK:

On the GTS screen, ON or OFF is displayed for each item according to the table above.

OK

REPLACE MULTIPLEX NETWORK BODY ECU

NG

6.

INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH (for Front Passenger Door)

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; DOOR LOCK: FRONT DOOR LOCK: INSPECTION

NG

REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH (for Front Passenger Door)

OK

7.

CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK WITH MOTOR ASSEMBLY RH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

(a) Disconnect the K5 front door lock with motor assembly RH connector.

(b) Disconnect the I231 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

K5-8 (L) - I85-28 (L2)

Always

Below 1 Ω

K5-9 (UL) - I231-25 (UL2)

Always

Below 1 Ω

K5-10 (E) - Body ground

Always

Below 1 Ω

K5-8 (L) - Body ground

Always

10 kΩ or higher

I85-28 (L2) - Body ground

Always

10 kΩ or higher

K5-9 (UL) - Body ground

Always

10 kΩ or higher

I231-25 (UL2) - Body ground

Always

10 kΩ or higher

OK

REPLACE MULTIPLEX NETWORK BODY ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR