Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001QT4V
Model Year Start: 2021 Model: RAV4 Prod Date Range: [08/2020 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): B2286,B228A,P0335; Runnable Signal Malfunction; 2021 - 2024 MY RAV4 [08/2020 -        ]

DTC

B2286

Runnable Signal Malfunction

DTC

B228A

Engine Speed Signal Circuit

DTC

P0335

Crankshaft Position Sensor Circuit Malfunction (NE Signal)

DESCRIPTION

These DTCs are stored when the engine speed signal sent by the ECM via direct line and the engine speed signal sent via CAN communication do not match.

HINT:

  • DTC B2286 is not stored for vehicles with stop and start system.
  • DTC B228A is stored only for vehicles with stop and start system.
  • When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

B2286

Runnable Signal Malfunction

The engine speed signal sent by the ECM via direct line and the engine speed signal sent via CAN communication (1-trip detection logic*) do not match.
  • SFI system
  • Certification ECU (smart key ECU assembly)
  • Harness or connector

Disconnect the cable from the negative (-) battery terminal, wait 30 seconds and reconnect the cable to the negative (-) battery terminal. Wait 20 seconds or more with the engine switch off, then start the engine and maintain an engine speed of 1000 rpm or more for 20 seconds or more.

B228A

Engine Speed Signal Circuit

The engine speed signal sent by the ECM via direct line and the engine speed signal sent via CAN communication (1-trip detection logic*) do not match.
  • SFI system
  • Certification ECU (Smart key ECU assembly)
  • Harness or connector

DTC Output Confirmation Operation:

  • Disconnect the cable from the negative (-) battery terminal, wait 30 seconds and reconnect the cable to the negative (-) battery terminal. Wait 20 seconds or more with the engine switch off, then start the engine and maintain an engine speed of 1000 rpm or more for 20 seconds or more.

P0335

Crankshaft Position Sensor Circuit Malfunction (NE Signal)

The engine speed signal sent by the ECM via direct line and the engine speed signal sent via CAN communication (1-trip detection logic*) do not match.
  • SFI system
  • Certification ECU (Smart key ECU assembly)
  • Harness or connector

DTC Output Confirmation Operation:

  • Allow the engine to idle for 10 seconds or more.
  • *: Only detected while a malfunction is present and the engine switch is on (IG).

Vehicle Condition and Fail-safe Function when Malfunction Detected

Vehicle Condition when Malfunction Detected

Fail-safe Function when Malfunction Detected
  • When the signal sent via either the direct line or CAN communication is malfunctioning and indicates no vehicle speed, there is no effect on vehicle behavior. (A malfunction is detected after the engine switch is turned on (IG).)
  • When the signal sent via either direct line or CAN communication is malfunctioning and indicates that the vehicle is moving, the engine cannot be started. However, the engine can be started after the engine switch has been turned off.
  • When the signal sent via either direct line or CAN communication is malfunctioning and indicates no vehicle speed, there is no effect on vehicle behavior.
  • When the signal sent via either direct line or CAN communication is malfunctioning and indicates that the vehicle is moving:

    If the following conditions are met, it can be determined that the malfunction is not in CAN communication but in the direct line (NE).

    • When the engine switch is pressed, the system controls the engine based on the starter OFF permission flag (perfect injection signal judgment) via CAN communication, causing the engine to stop cranking.
    • When the engine switch is pressed and held, the system controls the engine based on the engine speed signal via CAN communication, causing the engine to stop cranking.

    If the following conditions are met, it can be determined that the malfunction is not in the direct line (NE) but in CAN communication.

    • When the engine switch is pressed, the system controls the engine based on the engine speed signal via direct line, causing the engine to stop cranking.
    • When the engine switch is pressed and held, the system controls the engine based on the engine speed signal via direct line, causing the engine to stop cranking.

    If the following conditions are met, it can be determined that there is a malfunction in both CAN communication and the direct line (NE).

    • When the engine switch is pressed, the engine stops cranking after 6 seconds.
    • When the engine switch is pressed and held, the engine remains cranking for up to 30 seconds.

Related Data List and Active Test Items

DTC No.

Data List and Active Test

B2286

B228A

P0335

Power Source Control

  • Engine Condition

Starting Control

  • Engine Speed

WIRING DIAGRAM

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 and CAN 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 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING 2022 - 2023 MY RAV4 [12/2021 - 10/2023]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING 2024 MY RAV4 [10/2023 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • Inspect the fuses of circuits related to this system before performing the following procedure.
  • Before replacing the certification ECU (smart key ECU assembly), refer to the Registration.

    Click here 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2022 - 2024 MY RAV4 [12/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

1.

READ VALUE USING TECHSTREAM (ENGINE CONDITION, ENGINE SPEED)

(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 / Power Source Control / Data List.

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

Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Engine Condition

Engine state

Stop or Run

Stop: Engine stopped

Run: Engine running

-

Body Electrical > Power Source Control > Data List

Tester Display

Engine Condition

(f) Enter the following menus: Body Electrical / Starting Control / Data List.

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

Body Electrical > Starting Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Engine Speed

Engine speed

0 to 16383 rpm

Fluctuates in accordance with engine speed

-

Body Electrical > Starting Control > Data List

Tester Display

Engine Speed

OK:

The Techstream display changes correctly in response to the engine condition.

OK

GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

NG

2.

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

(a) Disconnect the A15 certification ECU (smart 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

A15-16 (NE) - A24-16 (NEO)

Always

Below 1 Ω

A15-16 (NE) or A24-16 (NEO) - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Reconnect the certification ECU (smart key ECU assembly) connector.

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))

(b) Reconnect the A24 ECM connector.

(c) Using an oscilloscope, check the engine speed input signal waveform at the terminal of the certification ECU (smart key ECU assembly).

OK:

Tester Connection

Condition

Specified Condition

A15-16 (NE) - Body ground

Engine stopped

No pulse generation

Engine running

Pulse generation
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

NG

GO TO SFI SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)