Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001QT58
Model Year Start: 2021 Model: RAV4 Prod Date Range: [08/2020 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (for Gasoline Model without Smart Key System): Engine does not Start but Initial Combustion Occurs; 2021 - 2024 MY RAV4 [08/2020 -        ]

Engine does not Start but Initial Combustion Occurs

DESCRIPTION

If the key ID codes of the door control transmitter assembly and transponder key ECU assembly match, the immobiliser system is unset and the engine start permission signal is sent to the ECM. When the ID codes of the transponder key ECU assembly and ECM match, the engine starts.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Before replacing the transponder key ECU assembly or ECM, refer to the Registration.

    Click here 2019 - 2022 MY RAV4 [11/2018 - 10/2022]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (for Gasoline Model without Smart Key System): REGISTRATION 2023 - 2024 MY RAV4 [10/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (for Gasoline Model without Smart Key System): REGISTRATION

  • Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart.
  • After completing repairs, confirm that the problem does not recur.
  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

1.

CHECK FOR DTC

(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 or Powertrain / Immobiliser or Engine / Trouble Codes.

(e) Check for DTCs.

Body Electrical > Immobiliser > 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

A

2.

READ VALUE USING TECHSTREAM (IMMOBILISER FUEL CUT STARTS)

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

(b) 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 system fuel cut

ON or OFF

OFF: Fuel cut off

ON: Fuel cut 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 (HOW TO PROCEED WITH TROUBLESHOOTING)

NG

3.

CHECK WHETHER ENGINE STARTS

(a) Check that the engine starts 5 seconds after the ignition switch was turned to ON.

OK:

Engine starts normally.

OK

USE SIMULATION METHOD TO CHECK

NG

4.

CHECK ECM (TERMINAL EFII AND EFIO)

(a) Using an oscilloscope, check the waveform.

*a

Component with harness connected

(Transponder Key ECU Assembly)

*b

Approximately 160 ms.

*c

Approximately 270 ms.

*d

Approximately 40 ms.

*e

Approximately 60 ms.

*f

IMO Waveform

*g

IMI Waveform

*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.

Measurement Condition:

Tester Connection

Condition

Tool Setting

Specified Condition

G52-10 (EFII) - Body ground

Within 3 seconds of engine start or within 3 seconds of ignition switch turned ON after cable disconnected and reconnected to battery

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

Pulse generation

(See waveform B)

G52-11 (EFIO) - Body ground

Within 3 seconds of engine start or within 3 seconds of ignition switch turned ON after cable disconnected and reconnected to battery

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

Pulse generation

(See waveform A and C)

Result

Proceed to

Normal waveform

A

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

B

Waveform B is not output, or has abnormal wavelength or shape

C

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

D

B

GO TO STEP 7

C

REPLACE ECM 2021 - 2022 MY RAV4 [08/2020 - 10/2022]; A25A-FKS (ENGINE CONTROL): ECM: REMOVAL 2023 MY RAV4 [10/2022 - 10/2023]; A25A-FKS (ENGINE CONTROL): ECM: REMOVAL 2024 MY RAV4 [10/2023 -        ]; A25A-FKS (ENGINE CONTROL): ECM: REMOVAL

D

GO TO STEP 8

A

5.

REGISTER ECU COMMUNICATION ID (TRANSPONDER KEY ECU ASSEMBLY - ECM)

(a) Register the communication ID between the transponder key ECU assembly and ECM.

Click here 2019 - 2022 MY RAV4 [11/2018 - 10/2022]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (for Gasoline Model without Smart Key System): REGISTRATION 2023 - 2024 MY RAV4 [10/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (for Gasoline Model without Smart Key System): REGISTRATION

NEXT

6.

CHECK WHETHER ENGINE STARTS

(a) Check that the engine starts 5 seconds after the ignition switch was turned to ON.

OK:

Engine starts normally.

OK

END (COMMUNICATION ID WAS NOT REGISTERED)

NG

GO TO STEP 8

7.

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)

(a) Disconnect the G52 transponder key ECU assembly connector.

(b) Disconnect the A24 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G52-10 (EFII) - A24-25 (IMO)

Always

Below 1 Ω

G52-11 (EFIO) - A24-26 (IMI)

Always

Below 1 Ω

G52-10 (EFII) or A24-25 (IMO) - Other terminals and body ground

Always

10 kΩ or higher

G52-11 (EFIO) or A24-26 (IMI) - Other terminals and body ground

Always

10 kΩ or higher

OK

GO TO STEP 8

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.

REPLACE TRANSPONDER KEY ECU ASSEMBLY

(a) Replace the transponder key ECU assembly with a new one.

Click here 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: TRANSPONDER KEY ECU: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; THEFT DETERRENT / KEYLESS ENTRY: TRANSPONDER KEY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; THEFT DETERRENT / KEYLESS ENTRY: TRANSPONDER KEY ECU: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; THEFT DETERRENT / KEYLESS ENTRY: TRANSPONDER KEY ECU: REMOVAL

NEXT

9.

REGISTER RECOGNITION CODE

(a) Register the recognition codes to the ECUs.

Click here 2019 - 2022 MY RAV4 [11/2018 - 10/2022]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (for Gasoline Model without Smart Key System): REGISTRATION 2023 - 2024 MY RAV4 [10/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (for Gasoline Model without Smart Key System): REGISTRATION

NEXT

10.

REGISTER ECU COMMUNICATION ID

(a) Register the ECU communication ID codes.

Click here 2019 - 2022 MY RAV4 [11/2018 - 10/2022]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (for Gasoline Model without Smart Key System): REGISTRATION 2023 - 2024 MY RAV4 [10/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (for Gasoline Model without Smart Key System): REGISTRATION

NEXT

11.

CHECK WHETHER ENGINE STARTS

(a) Check that the engine starts.

OK:

Engine starts normally.

OK

END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

NG

GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)