Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM1000000014YH4
Model Year Start: 2018 Model: Camry HV Prod Date Range: [07/2017 - 08/2022]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): TERMINALS OF ECU; 2018 - 2022 MY Camry HV [07/2017 - 08/2022]

TERMINALS OF ECU

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the R8 and K62 certification ECU (smart key ECU assembly) connectors.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Tester Connection

Wiring Color

Input / Output

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

R8-25 (STP1) - Body ground

BE - Body ground

Input

Stop light switch signal

Brake pedal depressed → Brake pedal released

9 V or higher → 1 V or less

Stop Light Switch1

K62-4 (+B) - K62-18 (E)

B - W-B

Input

Power source

Power switch off

11 to 14 V

-

K62-22 (P) - K62-18 (E)

R - W-B

Input

P position signal

Shift lever in P → Shift lever not in P

30 kΩ or higher → Below 200 Ω

Shift P Signal

K62-15 (CUTB) - Body ground

R - Body ground

Input

Dark current cut pin*

Power switch off

11 to 14 V

-

K62-18 (E) - Body ground

W-B - Body ground

-

GND

Always

Below 1 Ω

-

K62-21 (SSW2) - Body ground

L - Body ground

Input

SSW2 contact signal

HINT:

Backup for SSW1. Behaves the same way as SSW1.

Power switch pushed → Power switch not pushed

Below 15 Ω → 10 kΩ or higher

Start Switch2

K62-23 (SSW1) - Body ground

GR - Body ground

Input

SSW1 contact signal

Power switch pushed → Power switch not pushed

Below 15 Ω → 10 kΩ or higher

Start Switch1

K62-19 (SPD) - Body ground

R - Body ground

Input

Vehicle speed signal

Always

30 kΩ or higher

Vehicle Speed Signal
  • *: In order to prevent the vehicle auxiliary battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is installed in the circuit. If the fuse is removed, the circuit becomes open. If the fuse that is between the vehicle auxiliary battery and terminal CUTB is removed and the circuit is open, the certification ECU (smart key ECU assembly) changes to a certain control mode (example: the transmission of radio waves every 0.25 seconds, which form the detection area, stops).

(c) Connect the R8 and K62 certification ECU (smart key ECU assembly) connectors.

(d) Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.

Tester Connection

Wiring Color

Input / Output

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

K62-14 (SLP) - K62-18 (E)

G - W-B

Input

Steering lock position signal

Steering locked → Steering unlocked

11 to 14 V → 1.5 V or less

Steering Unlock Switch

K62-25 (SLR+) - K62-18 (E)

W - W-B

Output

Steering lock motor operation command signal

(Steering lock motor operation permission signal sent from the certification ECU (smart key ECU assembly))

When a door is opened, the steering lock motor will be operated if all of the following conditions are met:

  • The steering is unlocked.
  • The power switch is off.
  • The shift lever is in P.

Pulse generation

(See waveform 1)

-

K62-13 (LIN) - K62-18 (E)

B - W-B

Input / Output

LIN communication line

Power switch on (IG)

Pulse generation

Steering Lock Start Cond

K62-3 (IGB) - K62-18 (E)

GR - W-B

Output

IGB signal

Power switch off → Power switch on (IG)

1 V or less → 8.5 V or higher

-

K62-22 (P) - K62-18 (E)

R - W-B

Input

P position signal

Shift lever in P → Shift lever not in P

9 V or higher → 2.76 V or less

Shift P Signal

K62-21 (SSW2) - K62-18 (E)

L - W-B

Input

SSW2 contact signal

HINT:

Backup for SSW1. Behaves the same way as SSW1.

Power switch not pushed → Power switch pushed

9 V or higher → 1 V or less

Start Switch2

K62-23 (SSW1) - K62-18 (E)

GR - W-B

Input

SSW1 contact signal

Power switch not pushed → Power switch pushed

9 V or higher → 1 V or less

Start Switch1

K62-16 (ACCD) - K62-18 (E)

LG - W-B

Output

ACC signal

Power switch off → Power switch on (ACC)

1 V or less → 8.5 V or higher

ACC Relay Monitor

K62-17 (IG1D) - K62-18 (E)

R - W-B

Output

IG signal

Power switch on (ACC) → Power switch on (IG)

1 V or less → 9 V or higher

IG Relay Monitor (Outside)

K62-19 (SPD) - K62-18 (E)

R - W-B

Input

Vehicle speed signal

Vehicle being driven at approx. 5 km/h (3 mph)

Pulse generation

(See waveform 2)

Vehicle Speed Signal

K62-27 (ST2) - K62-18 (E)

L - W-B

Output

STSW signal

With the brake pedal depressed, the power switch is pressed and held → After approx. 3 sec. has elapsed, the power switch is released

8.5 V or higher → 1 V or less

-

K62-8 (CLG5) - K62-18 (E)

B - W-B

Output

Output to No. 1 indoor electrical key antenna assembly (front floor)

Procedure:

  1. Power switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

Pulse generation

(See waveform 3)

-

K62-9 (CG5B) - K62-18 (E)

LG - W-B

Output

Output to No. 1 indoor electrical key antenna assembly (front floor) (terminal on opposite side of component from CLG5 output terminal)

Procedure:

  1. Power switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

Pulse generation

(See waveform 3)

-

R8-5 (CLG6) - K62-18 (E)

W - W-B

Output

Output to No. 1 indoor electrical key antenna assembly (rear floor)

Procedure:

  1. Power switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

Pulse generation

(See waveform 3)

-

R8-6 (CG6B) - K62-18 (E)

R - W-B

Output

Output to No. 1 indoor electrical key antenna assembly (rear floor) (terminal on opposite side of component from CLG6 output terminal)

Procedure:

  1. Power switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

Pulse generation

(See waveform 3)

-

K62-5 (TXCT) - K62-11 (AGND)

GR - BE

Output

Signal output to transponder key amplifier

Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed

Below 1 V
  • BCC Malfunction
  • Abnormal Status
  • Different Encrypt Code
  • Different Serial Number
  • Frame Error
  • Response

K62-6 (CODE) - K62-11 (AGND)

B - BE

Input

Signal input from transponder key amplifier

Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed

Below 1 V

K62-7 (VC5) - K62-11 (AGND)

BE - BE

Output

Transponder key amplifier power supply

Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed

Below 1 V

K62-11 (AGND) - Body ground

BE - Body ground

-

Transponder key amplifier ground

Always

Below 1 Ω

K62-5 (TXCT) - K62-11 (AGND)

GR - BE

Output

Signal output to transponder key amplifier

(Code sent from certification ECU (smart key ECU assembly) to transponder key amplifier built into power switch, and then transmitted by transponder key amplifier antenna as radio waves)

Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

Pulse generation

(See waveform 4)
  • BCC Malfunction
  • Abnormal Status
  • Different Encrypt Code
  • Different Serial Number
  • Frame Error
  • Response

K62-6 (CODE) - K62-11 (AGND)

B - BE

Input

Signal input from transponder key amplifier

(Radio waves from transponder key amplifier built into power switch used to detect key information. Key information then sent to certification ECU (smart key ECU assembly))

Power switch off, power switch pressed with electrical key transmitter sub-assembly held near power switch

HINT:

Remove the transmitter battery before performing this inspection.

Pulse generation

(See waveform 5)

K62-7 (VC5) - K62-11 (AGND)

BE - BE

Output

Transponder key amplifier power supply

(Power supplied from certification ECU (smart key ECU assembly) when transponder key amplifier built into power switch activated)

Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

Pulse generation

(See waveform 6)

A13-3 (EFII) - K62-18 (E)

V - W-B

Input

EFI communication input

(Signal input from hybrid vehicle control ECU assembly to certification ECU (smart key ECU assembly))

Power switch off

11 to 14 V
  • EFI Code Receive
  • Engine Start Request

A13-4 (EFIO) - K62-18 (E)

GR - W-B

Output

EFI communication output

(Signal output from certification ECU (smart key ECU assembly) to hybrid vehicle control ECU assembly)

Power switch off

11 to 14 V → 1 V or less

A13-3 (EFII) - K62-18 (E)

V - W-B

Input

EFI communication input

(Signal input from hybrid vehicle control ECU assembly to certification ECU (smart key ECU assembly))

Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery

Pulse generation

(See waveform 7)

A13-4 (EFIO) - K62-18 (E)

GR - W-B

Output

EFI communication output

(Signal output from certification ECU (smart key ECU assembly) to hybrid vehicle control ECU assembly)

Power switch turned on (IG) using registered electrical key transmitter sub-assembly

Pulse generation

(See waveform 8)

K62-20 (IND) - K62-18 (E)

W - W-B

Output

Security indicator output

Power switch off → on (IG)

Pulse generation → Below 2 V

-

R8-7 (WCSW) - K62-18 (E)*

LG - W-B

Output

Wireless charger system stop signal

Procedure:

  1. Power switch off
  2. Electrical key transmitter sub-assembly inside vehicle
  3. Power switch off → on (ACC)

Below 1 V → 4.5 to 6 V

(For 1 second after power switch on (ACC))

-
  • *: w/ Wireless Charging System

HINT:

  • The waveform of the steering lock actuator motor stopped can be checked without performing any particular operation.
  • The waveform of the steering lock actuator motor operating can be checked if either of the following operations is performed:
    • To unlock the steering, bring the electrical key transmitter sub-assembly into the cabin and turn the power switch on (ACC) or on (IG).
    • To lock the steering, open a door with the power switch off and the shift lever in P.

(e) Using an oscilloscope, check the waveform of the ECU.

NOTICE:

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

(1) Waveform 1

*a

Steering lock motor not operating

*b

Steering lock motor operating

Measurement Condition

Item

Content

Tester Connection

K62-25 (SLR+) - K62-18 (E)

Tool Setting

2 V/DIV., 200 ms./DIV.

Condition

When a door is opened, the steering lock motor will be operated if all of the following conditions are met:

  • The steering is unlocked.
  • The power switch is off.
  • The shift lever is in P.

(2) Waveform 2

Measurement Condition

Item

Content

Tester Connection

K62-19 (SPD) - K62-18 (E)

Tool Setting

5 V/DIV., 20 ms./DIV.

Condition

Vehicle being driven at approx. 5 km/h (3 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

(3) Waveform 3

*a

For 30 seconds after any door closed

*b

After 30 seconds or more have elapsed since any door closed

Measurement Condition

Item

Content

Tester Connection

K62-8 (CLG5) - K62-18 (E)

K62-9 (CG5B) - K62-18 (E)

R8-5 (CLG6) - K62-18 (E)

R8-6 (CG6B) - K62-18 (E)

Tool Setting

2 V/DIV., 500 ms/DIV.

Condition

Procedure:

  1. Power switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

(4) Waveform 4

Measurement Condition

Item

Content

Tester Connection

K62-5 (TXCT) - K62-11 (AGND)

Tool Setting

2 V/DIV., 20 ms./DIV.

Condition

Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

(5) Waveform 5

*a

Waveform

*b

Waveform (detail)

Measurement Condition

Item

Content

Tester Connection

K62-6 (CODE) - K62-11 (AGND)

Tool Setting
  • Waveform

    1 V/DIV., 20 ms./DIV.

  • Waveform (detail)

    2 V/DIV., 100 μs./DIV.

Condition

Power switch off, power switch pressed with electrical key transmitter sub-assembly held near power switch*

HINT:

*: Remove the transmitter battery before performing this inspection.

(6) Waveform 6

Measurement Condition

Item

Content

Tester Connection

K62-7 (VC5) - K62-11 (AGND)

Tool Setting

2 V/DIV., 200 ms./DIV.

Condition

Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

(7) Waveform 7

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Measurement Condition

Item

Content

Tester Connection

A13-3 (EFII) - K62-18 (E)

Tool Setting

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

Condition

Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery

(8) Waveform 8

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Measurement Condition

Item

Content

Tester Connection

A13-4 (EFIO) - K62-18 (E)

Tool Setting

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

Condition

Power switch turned on (IG) using registered electrical key transmitter sub-assembly

CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)

(a) Disconnect the K65 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Wiring Color

Input / Output

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

K65-1 (GND) - Body ground

W-B - Body ground

-

Ground

Always

Below 1 Ω

-

K65-6 (IG2) - K65-1 (GND)

LG - W-B

Input

IG signal (IG2 power supply input for steering lock motor)

Power switch off

Below 1 V

-

Power switch on (IG)

11 to 14 V

K65-7 (B) - Body ground

W - Body ground

Input

Constant power supply

Power switch off

11 to 14 V

-

(c) Connect the K65 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

(d) Measure the voltage, and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Input / Output

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

K65-3 (IGE) - K65-1 (GND)

W - W-B

Input

Steering lock motor operation permission signal (motor operation permission signal supplied by certification ECU (smart key ECU assembly))

Steering lock motor operating when all conditions met, and then door opened:

  • Shift lever in P
  • Steering unlocked
  • Power switch turned off

Pulse generation

(See waveform 1)
  • Power Supply Short
  • Unlock Request Receive
  • Lock Request Receive

K65-4 (SLP1) - K65-1 (GND)

BE - W-B

Output

Steering lock bar position signal (signal output from steering unlock sensor)

Steering locked → unlocked

11 to 14 V → Below 1.5 V

Sensor Value

K65-5 (LIN) - K65-1 (GND)

B - W-B

Input / Output

LIN communication line

Power switch on (IG)

Pulse generation

Steering Lock Start Cond

HINT:

  • There is 1 motor and 2 sensors built into the steering lock actuator or upper bracket assembly.
  • When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.
  • In order to take measurements when the lock motor is operating, perform either of the following operations:
    • To unlock the steering, carry the key and turn the power switch on (ACC) or on (IG).
    • To lock the steering, turn the power switch off with the shift lever in P, and then open a door.

(e) Using an oscilloscope, check the waveform.

NOTICE:

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

(1) Waveform 1 (Reference)

*a

Steering lock motor not operating

*b

Steering lock motor operating

Measurement Condition

Item

Content

Tester Connection

K65-3 (IGE) - K65-1 (GND)

Tool Setting

2 V/DIV., 200 ms./DIV.

Condition

Steering lock motor operating when all conditions met, and then door opened:

  • Shift lever in P
  • Steering unlocked
  • Power switch turned off

CHECK HYBRID VEHICLE CONTROL ECU ASSEMBLY

(a) Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Input / Output

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

A28-3 (IG2) - K69-6 (E1)

B - W-B

Input

Ignition power supply

Power switch on (IG)

11 to 14 V

-

K69-6 (E1) - Body ground

W-B - Body ground

-

Ground

Always

Below 1 Ω

-

K70-23 (IMO) - K69-6 (E1)

BE - W-B

Output

EFI communication output

(Signal output from hybrid vehicle control ECU assembly to certification ECU (smart key ECU assembly))

Power switch off

11 to 14 V
  • EFI Code Receive
  • Engine Start Request

K70-23 (IMO) - K69-6 (E1)

BE - W-B

Output

EFI communication output

(Signal output from hybrid vehicle control ECU assembly to certification ECU (smart key ECU assembly))

Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery

Pulse generation

(See waveform 1)

K70-22 (IMI) - K69-6 (E1)

G - W-B

Input

EFI communication input

(Signal input from certification ECU (smart key ECU assembly) to hybrid vehicle control ECU assembly)

Power switch off

11 to 14 V → 1 V or less

K70-22 (IMI) - K69-6 (E1)

G - W-B

Input

EFI communication input

(Signal input from certification ECU (smart key ECU assembly) to hybrid vehicle control ECU assembly)

Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery

Pulse generation

(See waveform 2)

(b) Using an oscilloscope, check the waveform.

NOTICE:

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

(1) Waveform 1 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Measurement Condition

Item

Content

Tester Connection

K70-23 (IMO) - K69-6 (E1)

Tool Setting

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

Condition

Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery

(2) Waveform 2 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Measurement Condition

Item

Content

Tester Connection

K70-22 (IMI) - K69-6 (E1)

Tool Setting

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

Condition

Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery

CHECK POWER SWITCH

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

Terminal No. (Symbol)

Wiring Color

Input / Output

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

K63-6 (AGND) - Body ground

BE - Body ground

-

Transponder key amplifier ground

Always

Below 1 Ω

-

K63-7 (TXCT) - K63-6 (AGND)

GR - BE

Input

Immobiliser communication input

Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed

Below 1 V

-

K63-8 (CODE) - K63-6 (AGND)

B - BE

Output

Immobiliser communication output

Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed

Below 1 V

-

K63-10 (VC5) - K63-6 (AGND)

BE - BE

Input

Transponder key amplifier power supply

Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed

Below 1 V

-

(b) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Input / Output

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

K63-7 (TXCT) - K63-6 (AGND)

GR - BE

Input

Signal input from certification ECU (smart key ECU assembly)

(Code sent from certification ECU (smart key ECU assembly) to transponder key amplifier built into power switch, and then transmitted by transponder key amplifier antenna as radio waves)

Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

Pulse generation

(See waveform 1)
  • BCC Malfunction
  • Abnormal Status
  • Different Encrypt Code
  • Different Serial Number
  • Frame Error
  • Response

    HINT:

    If immobiliser key code verification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above

K63-8 (CODE) - K63-6 (AGND)

B - BE

Output

Signal output to certification ECU (smart key ECU assembly)

(Radio waves from transponder key amplifier built into power switch used to detect key information. Key information then sent to certification ECU (smart key ECU assembly))

Power switch off, power switch pressed with electrical key transmitter sub-assembly held near power switch*

Pulse generation

(See waveform 2)

K63-10 (VC5) - K63-6 (AGND)

BE - BE

Input

Transponder key amplifier power supply

(Power supplied from certification ECU (smart key ECU assembly) when transponder key amplifier built into power switch activated)

Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

Pulse generation

(See waveform 3)

HINT:

*: Remove the transmitter battery before performing this inspection.

(c) Using an oscilloscope, check the waveform.

NOTICE:

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

(1) Waveform 1 (Reference)

Measurement Condition

Item

Content

Tester Connection

K63-7 (TXCT) - K63-6 (AGND)

Tool Setting

2 V/DIV., 20 ms./DIV.

Condition

Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

(2) Waveform 2 (Reference)

*a

Waveform

*b

Waveform (detail)

Measurement Condition

Item

Content

Tester Connection

K63-8 (CODE) - K63-6 (AGND)

Tool Setting
  • Waveform

    1 V/DIV., 20 ms./DIV.

  • Waveform (detail)

    2 V/DIV., 100 μs./DIV.

Condition

Power switch off, power switch pressed with electrical key transmitter sub-assembly held near power switch*

HINT:

*: Remove the transmitter battery before performing this inspection.

(3) Waveform 3 (Reference)

Measurement Condition

Item

Content

Tester Connection

K63-10 (VC5) - K63-6 (AGND)

Tool Setting

2 V/DIV., 200 ms./DIV.

Condition

Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed