Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028KBQ
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM: Unlock Warning Switch Circuit; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]

Unlock Warning Switch Circuit

DESCRIPTION

The unlock warning switch assembly turns on when the key is inserted into the ignition key cylinder and turns off when the key is removed.

WIRING DIAGRAM

PROCEDURE

1.

READ VALUE USING GTS (KEY UNLOCK WARNING SWITCH)

(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

Key Unlock Warning Switch

Unlock warning switch

OFF or ON

OFF: Ignition key not inserted

ON: Ignition key inserted

-

Body Electrical > Main Body > Data List

Tester Display

Key Unlock Warning Switch

OK:

The GTS display changes correctly in response to the unlock warning switch assembly status.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT UNLOCK WARNING SWITCH ASSEMBLY

Click here 2020 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 -        ]; DOOR LOCK: UNLOCK WARNING SWITCH: INSPECTION

NG

REPLACE UNLOCK WARNING SWITCH ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - UNLOCK WARNING SWITCH ASSEMBLY AND BODY GROUND)

(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

I85-16 - I13-1 (UN+)

Always

Below 1 Ω

I85-16 or I13-1 (UN+) - Other terminals and body ground

Always

10 kΩ or higher

I13-2 (UN-) - Body ground

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR