Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM10000000134OI
Model Year Start: 2018 Model: Camry Prod Date Range: [03/2017 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM: Unlock Warning Switch Circuit; 2018 - 2024 MY Camry [03/2017 -        ]

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 TECHSTREAM (KEY UNLOCK WARNING SW)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(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

Key Unlock Warning SW

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 SW

OK:

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

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 2018 MY Camry [03/2017 - 06/2017]; THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM: PROBLEM SYMPTOMS TABLE 2018 - 2024 MY Camry [06/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: THEFT DETERRENT SYSTEM: PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT UNLOCK WARNING SWITCH ASSEMBLY

(a) Remove the unlock warning switch assembly.

Click here 2018 - 2024 MY Camry [03/2017 -        ]; DOOR LOCK: UNLOCK WARNING SWITCH: REMOVAL

(b) Inspect the unlock warning switch assembly.

Click here 2018 - 2024 MY Camry [03/2017 -        ]; DOOR LOCK: UNLOCK WARNING SWITCH: INSPECTION

NG

REPLACE UNLOCK WARNING SWITCH ASSEMBLY

OK

3.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the main body ECU (multiplex network body ECU).

Click here 2018 MY Camry [03/2017 - 06/2017]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

(b) Disconnect the 3A instrument panel junction block assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-41 - MB-3 (KSW)

Always

Below 1 Ω

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 2018 MY Camry [03/2017 - 06/2017]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

OK

4.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-41 - K31-1

Always

Below 1 Ω

3A-41 or K31-1 - Other terminals and body ground

Always

10 kΩ or higher

K31-2 - Body ground

Always

Below 1 Ω

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2018 MY Camry [03/2017 - 06/2017]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2018 - 2020 MY Camry [06/2017 - 10/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR