Toyota CH-R Service Manual: Terminals Of Ecu

TERMINALS OF ECU

CHECK ENGINE SWITCH

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

Terminal No. (Symbol)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

F59-6 (AGND) - Body ground

-

P - Body ground

Transponder key amplifier ground

Always

Below 1 Ω

-

F59-7 (TXCT) - F59-6 (AGND)

Input

B - P

Immobiliser communication input

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

Below 1 V

-

F59-8 (CODE) - F59-6 (AGND)

Output

L - P

Immobiliser communication output

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

Below 1 V

-

F59-10 (VC5) - F59-6 (AGND)

Input

Y - P

Transponder key amplifier power supply

Engine 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)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

F59-7 (TXCT) - F59-6 (AGND)

Input

B - P

Signal input from certification ECU (smart key ECU assembly)

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

Engine switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine 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

F59-8 (CODE) - F59-6 (AGND)

Output

L - P

Signal output to certification ECU (smart key ECU assembly)

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

Engine switch off, engine switch pressed with electrical key transmitter sub-assembly held near engine switch*

Pulse generation

(See waveform 2)

F59-10 (VC5) - F59-6 (AGND)

Input

Y - P

Transponder key amplifier power supply

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

Engine switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine 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

F59-7 (TXCT) - F59-6 (AGND)

Tool Setting

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

Condition

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

(2) Waveform 2 (Reference)

*a

Waveform

*b

Waveform (detail)

Measurement Condition

Item

Content

Tester Connection

F59-8 (CODE) - F59-6 (AGND)

Tool Setting

  • Waveform

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

  • Waveform (detail)

    2 V/DIV., 100 μs./DIV.

Condition

Engine switch off, engine switch pressed with electrical key transmitter sub-assembly held near engine switch*

HINT:

*: Remove the transmitter battery before performing this inspection.

(3) Waveform 3 (Reference)

Measurement Condition

Item

Content

Tester Connection

F59-10 (VC5) - F59-6 (AGND)

Tool Setting

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

Condition

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

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the F1 certification ECU (smart key ECU assembly) connector.

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

Terminal No. (Symbol)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

F1-4 (+B) - F1-18 (E)

Input

L - W-B

+B power supply

Always

11 to 14 V

-

F1-18 (E) - Body ground

-

W-B - Body ground

Ground

Always

Below 1 Ω

-

(c) Reconnect the F1 certification ECU (smart key ECU assembly) connector.

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

Terminal No. (Symbol)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

F1-17 (IG1D) - F1-18 (E)

Output

GR - W-B

Ignition power supply

Engine switch off

Below 1 V

-

Engine switch on (IG)

11 to 14 V

-

F1-5 (TXCT) - F1-11 (AGND)

Output

B - P

Signal output to transponder key amplifier

Engine 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

F1-6 (CODE) - F1-11 (AGND)

Input

L - P

Signal input from transponder key amplifier

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

Below 1 V

F1-7 (VC5) - F1-11 (AGND)

Output

Y - P

Transponder key amplifier power supply

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

Below 1 V

F1-11 (AGND) - Body ground

-

P - Body ground

Transponder key amplifier ground

Always

Below 1 Ω

F1-20 (IND) - F1-18 (E)

Output

P - W-B

Security indicator output

Engine switch off → on (IG)

Pulse generation → Below 2 V

-

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

Terminal No. (Symbol)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

F1-5 (TXCT) - F1-11 (AGND)

Output

B - P

Signal output to transponder key amplifier

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

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

Pulse generation

(See waveform 1)

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

F1-6 (CODE) - F1-11 (AGND)

Input

L - P

Signal input from transponder key amplifier

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

Engine switch off, engine switch pressed with electrical key transmitter sub-assembly held near engine switch

HINT:

Remove the transmitter battery before performing this inspection.

Pulse generation

(See waveform 2)

F1-7 (VC5) - F1-11 (AGND)

Output

Y - P

Transponder key amplifier power supply

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

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

Pulse generation

(See waveform 3)

(f) 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

F1-5 (TXCT) - F1-11 (AGND)

Tool Setting

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

Condition

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

(2) Waveform 2 (Reference)

*a

Waveform

*b

Waveform (detail)

Measurement Condition

Item

Content

Tester Connection

F1-6 (CODE) - F1-11 (AGND)

Tool Setting

  • Waveform

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

  • Waveform (detail)

    2 V/DIV., 100 μs./DIV.

Condition

Engine switch off, engine switch pressed with electrical key transmitter sub-assembly held near engine switch*

HINT:

*: Remove the transmitter battery before performing this inspection.

(3) Waveform 3 (Reference)

Measurement Condition

Item

Content

Tester Connection

F1-7 (VC5) - F1-11 (AGND)

Tool Setting

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

Condition

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

CHECK ID CODE BOX (IMMOBILISER CODE ECU)

(a) Disconnect the F21 ID code box (immobiliser code ECU) connector.

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

Terminal No. (Symbol)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

F21-1 (+B) - Body ground

Input

W - Body ground

+B power supply

Always

11 to 14 V

B2789

F21-5 (GND) - Body ground

-

W-B - Body ground

Ground

Always

Below 1 Ω

B2789

(c) Reconnect the F21 ID code box (immobiliser code ECU) connector.

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

Terminal No. (Symbol)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

F21-3 (EFII) - F21-5 (GND)

Input

G - W-B

EFI communication input

(Signal input from ECM to ID code box (immobiliser code ECU))

Engine switch off

11 to 14 V

  • B2799
  • B279A
  • EFI Code Receive
  • Engine Start Request

F21-4 (EFIO) - F21-5 (GND)

Output

R - W-B

EFI communication output

(Signal output from ID code box (immobiliser code ECU) to ECM)

Engine switch off

11 to 14 V → Below 1 V

F21-3 (EFII) - F21-5 (GND)

Input

G - W-B

EFI communication input

(Signal input from ECM to ID code box (immobiliser code ECU))

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

Pulse generation

(See waveform 1)

F21-4 (EFIO) - F21-5 (GND)

Output

R - W-B

EFI communication output

(Signal output from ID code box (immobiliser code ECU) to ECM)

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

Pulse generation

(See waveform 2)

(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

Approximately 160 ms.

*b

Approximately 270 ms.

Measurement Condition

Item

Content

Tester Connection

F21-3 (EFII) - F21-5 (GND)

Tool Setting

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

Condition

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

(2) Waveform 2 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Measurement Condition

Item

Content

Tester Connection

F21-4 (EFIO) - F21-5 (GND)

Tool Setting

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

Condition

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

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

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

Terminal No. (Symbol)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

F78-1 (GND) - Body ground

-

W-B - Body ground

Ground

Always

Below 1 Ω

-

F78-3 (IGE) - F78-1 (GND)

Input

P - W-B

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
  • Engine switch turned off

Pulse generation

(See waveform 1)

  • Power Supply Short
  • Unlock Request Receive
  • Lock Request Receive

F78-4 (SLP1) - F78-1 (GND)

Output

G - W-B

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

Steering locked → unlocked*

11 to 14 V → Below 1.5 V

Sensor Value

F78-6 (IG2) - F78-1 (GND)

Input

B - W-B

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

Engine switch off

Below 1 V

B2788

Engine switch on (IG)

11 to 14 V

F78-7 (B) - Body ground

Input

L - Body ground

Constant power supply

Always

11 to 14 V

B2788

HINT:

*: The steering locks when any door is opened with the shift lever in P and the engine switch off. The steering unlocks when the engine switch is turned on (ACC).

(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

Steering lock motor not operating

*b

Steering lock motor operating

Measurement Condition

Item

Content

Tester Connection

  • F78-3 (IGE) - F78-1 (GND)
  • F78-3 (IGE) - F78-1 (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
  • Engine switch turned off

CHECK ECM

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

Terminal No. (Symbol)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item/DTC

C63-59 (E1) - Body ground

-

W-B - Body ground

Ground

Always

Below 1 Ω

-

A38-45 (IMO) - C63-59 (E1)

Output

GR - W-B

ID code box (immobiliser code ECU) communication output

Engine switch off

11 to 14 V

-

A38-45 (IMO) - C63-59 (E1)

Output

GR - W-B

ID code box (immobiliser code ECU) communication output

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

Pulse generation

(See waveform 1)

-

A38-28 (IMI) - C63-59 (E1)

Input

BE - W-B

ID code box (immobiliser code ECU) communication input

Engine switch off

11 to 14 V → Below 1 V

-

A38-28 (IMI) - C63-59 (E1)

Input

BE - W-B

ID code box (immobiliser code ECU) communication input

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

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

A38-45 (IMO) - C63-59 (E1)

Tool Setting

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

Condition

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

(2) Waveform 2 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Measurement Condition

Item

Content

Tester Connection

A38-28 (IMI) - C63-59 (E1)

Tool Setting

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

Condition

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

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