Toyota Venza manuals

Toyota Venza: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK ENGINE SWITCH

(a) Disconnect the D13 engine switch connector.


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

HINT:

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

D13-8 (AGND) - Body ground

V - Body ground

Ground

Always

Below 1 Ω

If the result is not as specified, there may be a malfunction in the wire harness.

(c) Reconnect the D13 engine switch connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

D13-9 (TXCT) - D13-8 (AGND)

GR - V

Key code output signal

  • Engine switch off
  • 30 seconds after door opened and closed
  • Brake pedal not depressed

Below 1 V

D13-9 (TXCT) - D13-8 (AGND)

GR - V

Key code output signal

  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

Pulse generation

(See waveform 1)

D13-10 (CODE) - D13-8 (AGND)

LG - V

Demodulated signal of key code data

  • Engine switch off
  • 30 seconds after door opened and closed
  • Brake pedal not depressed

Below 1 V

D13-10 (CODE) - D13-8 (AGND)

LG - V

Demodulated signal of key code data

  • Engine switch off
  • Key battery removed
  • Engine switch touched with key and pressed

Pulse generation

(See waveform 2)

D13-14 (VC5) - D13-8 (AGND)

R - V

Power supply

  • Engine switch off
  • 30 seconds after door opened and closed
  • Brake pedal not depressed

Below 1 V

D13-14 (VC5) - D13-8 (AGND)

R - V

Power supply

  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

Pulse generation

(See waveform 3)

If the result is not as specified, the engine switch may have a malfunction.

(e) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)


Item

Content

Tester Connection

D13-9 (TXCT) - D13-8 (AGND)

Tool Setting

2 V/DIV., 50 ms./DIV.

Condition

  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

(2) Waveform 2 (Reference)


Item

Content

Tester Connection

D13-10 (CODE) - D13-8 (AGND)

Tool Setting

2 V/DIV., 50 ms./DIV.

Condition

  • Engine switch off
  • Key battery removed
  • Engine switch touched with key and pressed

(3) Waveform 3 (Reference)


Item

Content

Tester Connection

D13-14 (VC5) - D13-8 (AGND)

Tool Setting

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

Condition

  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the D25 certification ECU (smart key ECU assembly) connector.


(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 connector disconnected.

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

D25-1 (+B) - D25-15 (E)

G - B

+B power supply

Always

11 to 14 V

D25-15 (E) - Body ground

B - Body ground

Ground

Always

Below 1 Ω

If the result is not as specified, there may be a malfunction in the wire harness.

(c) Reconnect the D25 certification ECU (smart key ECU assembly) connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

D25-2 (INDS) - Body ground

Y - Body ground

Security indicator light signal

Engine switch on (IG), security indicator light off

Below 2 V

D25-2 (INDS) - Body ground

Y - Body ground

Security indicator light signal

Engine switch off, security indicator light blinks

Pulse generation

D25-12 (TXCT) - D25-36 (AGND)

GR - V

Engine switch TXCT output

  • Engine switch off
  • 30 seconds after door opened and closed
  • Brake pedal not depressed

Below 1 V

D25-12 (TXCT) - D25-36 (AGND)

GR - V

Engine switch TXCT output

  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

Pulse generation

(See waveform 1)

D25-13 (CODE) - D25-36 (AGND)

LG - V

Engine switch CODE input

  • Engine switch off
  • 30 seconds after door opened and closed
  • Brake pedal not depressed

Below 1 V

D25-13 (CODE) - D25-36 (AGND)

LG - V

Engine switch CODE input

  • Engine switch off
  • Key battery removed
  • Engine switch touched with key and pressed

Pulse generation

(See waveform 2)

D25-16 (IG) - D25-15 (E)

R - B

Ignition power supply

Engine switch off

Below 1 V

D25-16 (IG) - D25-15 (E)

R - B

Ignition power supply

Engine switch on (IG)

11 to 14 V

D25-28 (VC5) - D25-36 (AGND)

R - V

Engine switch power supply

  • Engine switch off
  • 30 seconds after door opened and closed
  • Brake pedal not depressed

Below 1 V

D25-28 (VC5) - D25-36 (AGND)

R - V

Engine switch power supply

  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

Pulse generation

(See waveform 3)

D25-34 (EFII) - D25-15 (E)

BR - B

ECM input signal

Engine switch off

11 to 14 V

D25-34 (EFII) - D25-15 (E)

BR - B

ECM input signal

Within 3 seconds after the starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

Pulse generation

(See waveform 4)

D25-35 (EFIO) - D25-15 (E)

G - B

ECM output signal

Engine switch off

11 to 14 V

D25-35 (EFIO) - D25-15 (E)

G - B

ECM output signal

Engine switch on (IG)

Pulse generation

(See waveform 5)

D25-36 (AGND) - Body ground

V - Body ground

Engine switch ground

Always

Below 1 Ω

If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.

(e) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)


Item

Content

Tester Connection

D25-12 (TXCT) - D25-36 (AGND)

Tool Setting

2 V/DIV., 50 ms./DIV.

Condition

  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

(2) Waveform 2 (Reference)


Item

Content

Tester Connection

D25-13 (CODE) - D25-36 (AGND)

Tool Setting

2 V/DIV., 50 ms./DIV.

Condition

  • Engine switch off
  • Key battery removed
  • Engine switch touched with key and pressed

(3) Waveform 3 (Reference)


Item

Content

Tester Connection

D25-28 (VC5) - D25-36 (AGND)

Tool Setting

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

Condition

  • Engine switch off
  • Key not in cabin
  • Engine switch pressed within 30 seconds

(4) Waveform 4 (Reference)


Item

Content

Tester Connection

D25-34 (EFII) - D25-15 (E)

Tool Setting

5 V/DIV., 500 ms/DIV.

Condition

Within 3 seconds after the starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

(5) Waveform 5 (Reference)


Item

Content

Tester Connection

D25-35 (EFIO) - D25-15 (E)

Tool Setting

5 V/DIV., 100 ms./DIV.

Condition

Engine switch on (IG)

3. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

(a) Disconnect the D17 steering lock ECU (steering lock actuator assembly) connector.


(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 connector disconnected.

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

D17-1 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

D17-6 (IG2) - Body ground

LG - Body ground

Ignition power supply

Engine switch off

Below 1 V

D17-6 (IG2) - Body ground

LG - Body ground

Ignition power supply

Engine switch on (IG)

11 to 14 V

D17-7 (B) - Body ground

P - Body ground

+B power supply

Always

11 to 14 V

If the result is not as specified, there may be a malfunction in the wire harness.

4. CHECK ECM (for 2GR-FE)

(a) The values listed under "Specified Condition" are reference values. Because waterproof connectors are used for ECM, inspections cannot be performed with the connectors connected.


Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

B39-81 (E1) - Body ground

W - Body ground

Ground

Always

Below 1 Ω

A41-29 (IMO) - B39-81 (E1)

BR - W

Certification ECU (smart key ECU assembly) output signal

Engine switch off

11 to 14 V

A41-29 (IMO) - B39-81 (E1)

BR - W

Certification ECU (smart key ECU assembly) output signal

Within 3 seconds after the starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

Pulse generation

(See waveform 1)

A41-40 (IMI) - B39-81 (E1)

G - W

Certification ECU (smart key ECU assembly) input signal

Engine switch off

11 to 14 V

A41-40 (IMI) - B39-81 (E1)

G - W

Certification ECU (smart key ECU assembly) input signal

Engine switch on (IG)

Pulse generation

(See waveform 2)

(b) Waveform:

(1) Waveform 1 (Reference)


Item

Content

Tester Connection

A41-29 (IMO) - B39-81 (E1)

Tool Setting

5 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds after the starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

(2) Waveform 2 (Reference)


Item

Content

Tester Connection

A41-40 (IMI) - B39-81 (E1)

Tool Setting

5 V/DIV., 100 ms./DIV.

Condition

Engine switch on (IG)

5. CHECK ECM (for 1AR-FE)

(a) The values listed under "Specified Condition" are reference values. Because waterproof connectors are used for ECM, inspections cannot be performed with the connectors connected.


Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

B58-104 (E1) - Body ground

BR - Body ground

Ground

Always

Below 1 Ω

A49-10 (IMO) - B58-104 (E1)

BR - BR

Certification ECU (smart key ECU assembly) output signal

Engine switch off

11 to 14 V

A49-10 (IMO) - B58-104 (E1)

BR - BR

Certification ECU (smart key ECU assembly) output signal

Within 3 seconds after the starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

Pulse generation

(See waveform 1)

A49-11 (IMI) - B58-104 (E1)

G - BR

Certification ECU (smart key ECU assembly) input signal

Engine switch off

Below 1 V

A49-11 (IMI) - B58-104 (E1)

G - BR

Certification ECU (smart key ECU assembly) input signal

Engine switch on (IG)

Pulse generation

(See waveform 2)

(b) Waveform:

(1) Waveform 1 (Reference)


Item

Content

Tester Connection

A49-10 (IMO) - B58-104 (E1)

Tool Setting

5 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds after the starter operates and initial combustion occurs, or within 3 seconds after engine switch first turned on (IG) after battery disconnected and connected

(2) Waveform 2 (Reference)


Item

Content

Tester Connection

A49-11 (IMI) - B58-104 (E1)

Tool Setting

5 V/DIV., 100 ms./DIV.

Condition

Engine switch on (IG)

6. CHECK POWER MANAGEMENT CONTROL ECU

(a) Disconnect the D43 power management control ECU connector.


(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 connector disconnected.

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

D43-1 (AM22) - Body ground

LG - Body ground

Battery

Always

11 to 14 V

D43-2 (AM21) - Body ground

Y - Body ground

Battery

Always

11 to 14 V

D43-5 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

D43-6 (GND) - Body ground

W - Body ground

Ground

Always

Below 1 Ω

If the result is not as specified, there may be a malfunction in the wire harness.

7. ACCESSORY METER ASSEMBLY

(a) Disconnect the F2 accessory meter 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 connector disconnected.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F2-1 (B) - Body ground

P - Body ground

Battery

Always

11 to 14 V

F2-12 (E) - Body ground

B - Body ground

Ground

Always

Below 1 Ω

If the result is not as specified, there may be a malfunction in the wire harness.

(c) Reconnect the F2 accessory meter assembly connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

F2-14 (LP) - Body ground

Y - Body ground

Security indicator light signal

Engine switch on (IG), security indicator light off

Below 2 V

F2-14 (LP) - Body ground

Y - Body ground

Security indicator light signal

Engine switch off, security indicator light blinks

Pulse generation

If the result is not as specified, the accessory meter assembly may have a malfunction.

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