Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001S0IX
Model Year Start: 2021 Model: RAV4 HV Prod Date Range: [08/2020 - 12/2021]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Power Source Mode does not Change to ON (READY); 2021 MY RAV4 HV [08/2020 - 12/2021]

Power Source Mode does not Change to ON (READY)

DESCRIPTION

When the electrical key transmitter sub-assembly is in the cabin and the power switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. Additionally, when the shift state is park (P) and the brake pedal is depressed, the hybrid control system can be started by pressing the power switch. If the steering is unlocked, the hybrid control system can also be started by pressing the power switch with the shift state park (P) and the brake pedal depressed.

Related Data List and Active Test Items

Problem Symptom

Data List and Active Test

Power source mode does not change to ON (READY)

Power Source Control

  • Stop Light Switch1
  • Steering Unlock Switch
  • Shift P Signal
  • IG Relay Monitor (Inside)
  • IG Relay Monitor (Outside)
  • Latch Circuit
  • Starter Request Signal
  • Power Supply Condition

Smart Key

  • Immobiliser
  • Hybrid Control System Start Request
  • S Code Check
  • L Code Check

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When using the Techstream with the power 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.
  • If the smart key system (for Start Function) has been canceled, enable the system before performing troubleshooting.

    Click here 2019 - 2022 MY RAV4 HV [11/2018 - 10/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): CUSTOMIZE PARAMETERS

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

    Click here 2020 - 2021 MY RAV4 HV [10/2019 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

  • After completing repairs, confirm that the problem does not recur.
  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
  • When disconnecting the cable from the negative (-) auxiliary battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

    Click here 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

PROCEDURE

1.

CHECK POWER SWITCH CONDITION

(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.

(b) Move the shift state park (P).

(c) With the brake pedal released, check that pressing the power switch causes the power source mode to change.

Result

Proceed to

Power source mode changes : Off → on (ACC) → on (IG) → off

A

Power source mode does not change to on (ACC) or on (IG)

B

Power source mode changes to on (IG) but not to on (ACC)

C

Power source mode changes to on (ACC) but not to on (IG)

D
B

GO TO SMART KEY SYSTEM (for Start Function) (Power Source Mode does not Change to ON (IG and ACC))

C

GO TO SMART KEY SYSTEM (for Start Function) (Power Source Mode does not Change to ON (ACC))

D

GO TO SMART KEY SYSTEM (for Start Function) (Power Source Mode does not Change to ON (IG))

A

2.

READ VALUE USING TECHSTREAM (STOP LIGHT SWITCH1)

(a) Connect the Techstream to the DLC3.

(b) Turn the power 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

Stop Light Switch1

State of brake pedal

OFF or ON

OFF: Brake pedal released

ON: Brake pedal depressed
  • Use this item to determine if the stop light switch assembly is malfunctioning.
  • The hybrid control system cannot be started when this item is OFF.
  • If the stop light switch assembly is malfunctioning, the hybrid control system can be started by pressing and holding the power switch for a certain period of time.

Body Electrical > Power Source Control > Data List

Tester Display

Stop Light Switch1

OK:

The Techstream display changes correctly in response to the brake pedal operation.

NG

GO TO STEP 12

OK

3.

READ VALUE USING TECHSTREAM (SHIFT P SIGNAL)

(a) 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

Shift P Signal

State of brake pedal

ON or OFF

ON: Shift state park (P)

OFF: Shift state not park (P)
  • Use this item to determine if the shift position switch is malfunctioning.
  • The hybrid control system cannot be started when this item is OFF.

Body Electrical > Power Source Control > Data List

Tester Display

Shift P Signal

OK:

The Techstream display changes correctly in response to the shift state.

NG

GO TO STEP 9

OK

4.

READ VALUE USING TECHSTREAM (STARTER REQUEST SIGNAL)

(a) 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

Starter Request Signal

Hybrid control system start request signal status

OFF or ON

OFF: The power switch is not pressed

ON: With the shift state park (P) and the brake pedal depressed, the power switch is pressed and held
  • When the hybrid control system cannot be started due to a start request signal malfunction, OFF is displayed.
  • When the power switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the power switch needs to be pressed and held for a certain period of time.

Body Electrical > Power Source Control > Data List

Tester Display

Starter Request Signal

NOTICE:

Check that the key indicator display is displayed on the multi-information display in the combination meter assembly, and then press the power switch.

OK:

The Techstream display changes correctly in response to the power switch operation.

NG

GO TO STEP 7

OK

5.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - HYBRID VEHICLE CONTROL ECU ASSEMBLY)

(a) Disconnect the G54 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the A30 hybrid vehicle control ECU assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G54-27 (ST2) - A30-4 (ST2)

Always

Below 1 Ω

G54-27 (ST2) or A30-4 (ST2) - Other terminals and body ground

Always

10 kΩ or higher

(d) Connect the G54 certification ECU (smart key ECU assembly) connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G54-27 (ST2) - Body ground

With the brake pedal depressed, the power switch is pressed and held → After approximately 3 seconds has elapsed, the power switch is released

8.5 V or higher → 1 V or less

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))
OK

GO TO HYBRID CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

for AWD with Nickel Metal Hydride Battery:

Click here 2019 - 2024 MY RAV4 HV [02/2019 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for AWD with NICKEL METAL HYDRIDE BATTERY): HOW TO PROCEED WITH TROUBLESHOOTING

for Lithium-ion Battery

Click here 2020 - 2024 MY RAV4 HV [06/2020 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY): HOW TO PROCEED WITH TROUBLESHOOTING

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

7.

CHECK STEERING LOCK

(a) Check that the steering unlocks when the power switch is turned on (ACC).

OK:

The steering unlocks.

NG

GO TO SMART KEY SYSTEM (for Start Function) (Unable to Unlock Steering Wheel (Hybrid Control System cannot Start))

OK

8.

CHECK SECURITY INDICATOR LIGHT (IMMOBILISER FUNCTION UNSET)

(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.

(b) Move the shift state park (P).

(c) Press the power switch with the brake pedal released and check that the security indicator light changes from blinking to off at the same time that the power source mode changes to on (ACC).

OK:

The security indicator light changes from blinking to off at the same time that the power source mode changes to on (ACC).

HINT:

The immobiliser function can be determined to be operating correctly if the security indicator light changes from blinking to off at the same time that the power source mode changes to on (ACC).

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

GO TO SMART KEY SYSTEM (for Start Function) (Immobiliser System does not Operate Properly)

9.

CHECK SHIFT LOCK CONTROL UNIT ASSEMBLY (OUTPUT TO CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G54-22 (P) - Other terminals and body ground

Shift state park (P) → Shift state not park (P)

9 V or higher → 2.76 V or less

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

10.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - SHIFT LOCK CONTROL UNIT ASSEMBLY)

(a) Disconnect the G54 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the G26 shift lock control unit assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G54-22 (P) - G26-3 (P2)

Always

Below 1 Ω

G54-22 (P) or G26-3 (P2) - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

11.

CHECK SHIFT LOCK CONTROL UNIT ASSEMBLY

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

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G54-22 (P) - Other terminals and body ground

Power switch off

9 V or higher
OK

REPLACE SHIFT LOCK CONTROL UNIT ASSEMBLY

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

12.

CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER SUPPLY AND BODY GROUND)

(a) Disconnect the stop light switch assembly connector.

*a

Front view of wire harness connector

(to Stop Light Switch Assembly)

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A40-7 (B) - Body ground

Power switch off

11 to 14 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A40-2 (GND) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

13.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY)

(a) Disconnect the M7 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the A29 hybrid vehicle control ECU assembly connector.

(c) Disconnect the A42 skid control ECU assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

M7-25 (STP1) - A40-3 (L)

Always

Below 1 Ω

M7-25 (STP1) or A40-3 (L) - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

14.

INSPECT STOP LIGHT SWITCH ASSEMBLY

(a) Inspect the stop light switch assembly.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (EXT): STOP LIGHT SWITCH: ON-VEHICLE INSPECTION

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPLACE STOP LIGHT SWITCH ASSEMBLY