Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000015GTB
Model Year Start: 2018 Model: Camry Prod Date Range: [06/2017 - 08/2022]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): Immobiliser System does not Operate Properly; 2018 - 2022 MY Camry [06/2017 - 08/2022]

Immobiliser System does not Operate Properly

DESCRIPTION

The immobiliser function compares the ID code that is registered in the certification ECU (smart key ECU assembly) with the ID code of the transponder chip that is embedded in the electrical key transmitter sub-assembly.

WIRING DIAGRAM

Click here 2018 - 2022 MY Camry [06/2017 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B279986; Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid

CAUTION / NOTICE / HINT

NOTICE:

  • When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
  • The smart key system (for Start Function) uses the LIN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here 2018 - 2022 MY Camry [03/2017 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before replacing the ECM or certification ECU (smart key ECU assembly), refer to Registration.

    Click here 2018 - 2019 MY Camry [03/2017 - 09/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION 2020 - 2022 MY Camry [09/2019 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
  • Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart.

HINT:

If an immobiliser function or SFI system DTC is output, first perform troubleshooting for the immobiliser function or SFI system DTC.

PROCEDURE

1.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Smart Key > Trouble Codes

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO DIAGNOSTIC TROUBLE CODE CHART 2018 - 2019 MY Camry [03/2017 - 09/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION 2020 - 2022 MY Camry [09/2019 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION

A

2.

READ VALUE USING TECHSTREAM (IMMOBILISER FUEL CUT STATUS)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Data List.

(e) Read the Data List according to the display on the Techstream.

Powertrain > Engine > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Immobiliser Fuel Cut Status

Status of immobiliser fuel cut

OFF or ON

-

-

Powertrain > Engine > Data List

Tester Display

Immobiliser Fuel Cut Status

OK:

OFF is displayed after the engine is started.

OK

GO TO SFI SYSTEM

for A25A-FKS: Click here 2018 - 2024 MY Camry [03/2017 -        ]; A25A-FKS (ENGINE CONTROL): SFI SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

for 2GR-FKS: Click here 2018 - 2024 MY Camry [06/2017 -        ]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

NG

3.

CHECK WHETHER ENGINE STARTS

(a) Check that the engine starts 5 seconds after the engine switch turned on (IG).

OK:

Engine starts normally.

OK

USE SIMULATION METHOD TO CHECK 2018 MY Camry [06/2017 - 08/2018]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2019 MY Camry [08/2018 - 09/2019]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2020 MY Camry [09/2019 - 03/2020]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2020 MY Camry [03/2020 - 10/2020]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2021 MY Camry [10/2020 - 08/2021]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2022 - 2024 MY Camry [08/2021 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

NG

4.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ECM)

(a) Disconnect the A13 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the A24*1 or A21*2 ECM connector.

  • *1: for A25A-FKS
  • *2: for 2GR-FKS

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

Standard Resistance:

for A25A-FKS

Tester Connection

Condition

Specified Condition

A13-3 (EFII) - A24-25 (IMO)

Always

Below 1 Ω

A13-4 (EFIO) - A24-26 (IMI)

Always

Below 1 Ω

A13-3 (EFII) or A24-25 (IMO) - Other terminals and body ground

Always

10 kΩ or higher

A13-4 (EFIO) or A24-26 (IMI) - Other terminals and body ground

Always

10 kΩ or higher

for 2GR-FKS

Tester Connection

Condition

Specified Condition

A13-3 (EFII) - A21-45 (IMO)

Always

Below 1 Ω

A13-4 (EFIO) - A21-59 (IMI)

Always

Below 1 Ω

A13-3 (EFII) or A21-45 (IMO) - Other terminals and body ground

Always

10 kΩ or higher

A13-4 (EFIO) or A21-59 (IMI) - Other terminals and body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK ECM (TERMINAL EFIO AND EFII)

(a) Connect the A13 certification ECU (smart key ECU assembly) connector.

(b) Connect the A24*1 or A21*2 ECM connector.

  • *1: for A25A-FKS
  • *2: for 2GR-FKS

(c) Using an oscilloscope, check the waveform.

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))

*b

Approximately 160 ms

*c

Approximately 270 ms

*d

Approximately 40 ms

*e

Approximately 60 ms

*f

Waveform (EFII)

*g

Waveform (EFIO)

*h

Waveform A

*i

Waveform B

*j

Waveform C

*k

Waveform A (detail)

-

-

NOTICE:

The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

OK:

Tester Connection

Condition

Tool Setting

Specified Condition

A13-3 (EFII) - Body ground

Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

2 V/DIV., 500 ms./DIV.

Pulse generation

(See waveform (EFII))

A13-4 (EFIO) - Body ground

Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

2 V/DIV., 500 ms./DIV.

Pulse generation

(See waveform (EFIO))

Result

Proceed to

Normal waveform

A

Waveform A or C not output, or has abnormal wavelength or shape

B

Waveform B not output, or has abnormal wavelength or shape

C

B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2018 - 2020 MY Camry [06/2017 - 10/2020]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

C

REPLACE ECM

for A25A-FKS: Click here 2018 - 2020 MY Camry [06/2017 - 03/2020]; A25A-FKS (ENGINE CONTROL): ECM: REMOVAL 2020 MY Camry [03/2020 - 10/2020]; A25A-FKS (ENGINE CONTROL): ECM: REMOVAL 2021 - 2022 MY Camry [10/2020 - 08/2022]; A25A-FKS (ENGINE CONTROL): ECM: REMOVAL

for 2GR-FKS: Click here 2018 - 2020 MY Camry [06/2017 - 10/2020]; 2GR-FKS (ENGINE CONTROL): ECM: REMOVAL 2021 - 2022 MY Camry [10/2020 - 08/2022]; 2GR-FKS (ENGINE CONTROL): ECM: REMOVAL

A

6.

REGISTER ECU COMMUNICATION ID

(a) Register the ECU communication ID.

HINT:

Refer to Registration.

Click here 2018 - 2019 MY Camry [03/2017 - 09/2019]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION 2020 - 2022 MY Camry [09/2019 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): REGISTRATION

NEXT

7.

CHECK WHETHER ENGINE STARTS

(a) Check that the engine starts.

OK:

Engine starts normally.

OK

END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE)

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2018 - 2020 MY Camry [06/2017 - 10/2020]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL