Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001D1O3
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 - 09/2022]
Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Hatchback, Gasoline Model): All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]

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

DESCRIPTION

The main body ECU (multiplex network body ECU) receives switch signals from the door key lock and unlock switch (front door lock with motor assembly) and driver door key cylinder lock or unlock switch signals from the front door lock with motor assembly. 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:

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

Click here 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2021 - 2022 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

PROCEDURE

1.

READ VALUE USING TECHSTREAM (DOOR KEY SW-LOCK, D DOOR KEY SW-UL)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine 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

Door Key SW-Lock

Driver door key-linked lock / unlock switch lock signal

OFF or ON

OFF: Driver door key cylinder not turned to lock position

ON: Driver door key cylinder turned to lock position

-

D Door Key SW-UL

Driver door key-linked lock / unlock 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 Key SW-Lock

D Door Key SW-UL

OK

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NG

2.

INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH

(a) Remove the front door lock with motor assembly LH.

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(b) Inspect the front door lock with motor assembly LH.

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; DOOR LOCK: FRONT DOOR LOCK: INSPECTION 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; DOOR LOCK: FRONT DOOR LOCK: INSPECTION

NG

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OK

3.

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

(a) Disconnect the I84 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

L4-9 (L) - I84-18 (L2)

Always

Below 1 Ω

L4-10 (UL) - I84-17 (UL3)

Always

Below 1 Ω

L4-7 (E) - Body ground

Always

Below 1 Ω

L4-9 (L) or I84-18 (L2) - Other terminals and body ground

Always

10 kΩ or higher

L4-10 (UL) or I84-17 (UL3) - Other terminals and body ground

Always

10 kΩ or higher

OK

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NG

REPAIR OR REPLACE HARNESS OR CONNECTOR