Toyota Venza manuals

Toyota Venza: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK TRANSPONDER KEY AMPLIFIER

(a) Disconnect the D21 transponder key amplifier 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

D21-7 (AGND) - Body ground

W - Body ground

Ground

Always

Below 1 Ω

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

(c) Reconnect the D21 transponder key amplifier connector.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

D21-1 (VC5) - D21-7 (AGND)

R - W

Power source

No key in ignition key cylinder

Below 1 V

D21-1 (VC5) - D21-7 (AGND)

R - W

Power source

Key in ignition key cylinder

4.6 to 5.4 V

D21-4 (CODE) - D21-7 (AGND)

LG - W

Demodulated signal of key code data

No key in ignition key cylinder

Below 1 V

D21-4 (CODE) - D21-7 (AGND)

LG - W

Demodulated signal of key code data

Key in ignition key cylinder

Pulse generation

(See waveform 1)

D21-5 (TXCT) - D21-7 (AGND)

BR - W

Key code output signal

No key in ignition key cylinder

Below 1 V

D21-5 (TXCT) - D21-7 (AGND)

BR - W

Key code output signal

Key in ignition key cylinder

Pulse generation

(See waveform 2)

If the result is not as specified, the transponder key amplifier may have a malfunction.

(e) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)


Tester Connection

D21-4 (CODE) - D21-7 (AGND)

Tool Setting

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

Condition

Key is in ignition key cylinder

(2) Waveform 2 (Reference)


Tester Connection

D21-5 (TXCT) - D21-7 (AGND)

Tool Setting

2 V/DIV., 10 ms./DIV.

Condition

Key is in ignition key cylinder

2. CHECK TRANSPONDER KEY ECU ASSEMBLY

(a) Disconnect the D22 transponder 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

D22-16 (GND) - Body ground

B - Body ground

Ground

Always

Below 1 Ω

D22-1 (+B) - D22-16 (GND)

G - B

Battery

Always

11 to 14 V

D22-2 (IG) - D22-16 (GND)

R - B

Ignition switch signal

Ignition switch off

Below 1 V

D22-2 (IG) - D22-16 (GND)

R - B

Ignition switch signal

Ignition switch ON

11 to 14 V

D22-3 (KSW) - D22-16 (GND)

V - B

Unlock warning switch signal

No key in ignition key cylinder

10 kΩ or higher

D22-3 (KSW) - D22-16 (GND)

V - B

Unlock warning switch signal

Key in ignition key cylinder

Below 1 Ω

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

(c) Reconnect the D22 transponder 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

D22-5 (AGND) - Body ground

W - Body ground

Ground

Always

Below 1 Ω

D22-3 (KSW) - D22-16 (GND)

V - B

Unlock warning switch signal

No key in ignition key cylinder

11 to 14 V

D22-3 (KSW) - D22-16 (GND)

V - B

Unlock warning switch signal

Key in ignition key cylinder

Below 1 V

D22-14 (VC5) - D22-5 (AGND)

R - W

Power source

No key in ignition key cylinder

Below 1 V

D22-14 (VC5) - D22-5 (AGND)

R - W

Power source

Key in ignition key cylinder

4.6 to 5.4 V

D22-4 (TXCT) - D22-5 (AGND)

BR - W

Transponder key amplifier communication signal

No key in ignition key cylinder

Below 1 V

D22-4 (TXCT) - D22-5 (AGND)

BR - W

Transponder key amplifier communication signal

Key in ignition key cylinder

Pulse generation

(See waveform 1)

D22-15 (CODE) - D22-5 (AGND)

LG - W

Transponder key amplifier communication signal

No key in ignition key cylinder

Below 1 V

D22-15 (CODE) - D22-5 (AGND)

LG - W

Transponder key amplifier communication signal

Key in ignition key cylinder

Pulse generation

(See waveform 2)

D22-13 (EFIO) - D22-16 (GND)

G - B

ECM output signal

Ignition switch off

Below 1 V

D22-13 (EFIO) - D22-16 (GND)

G - B

ECM output signal

Ignition switch ON

Pulse generation

(See waveform 3)

D22-12 (EFII) - D22-16 (GND)

BR - B

ECM input signal

Ignition switch off

11 to 14 V

D22-12 (EFII) - D22-16 (GND)

BR - B

ECM input signal

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

Pulse generation

(See waveform 4)

D22-9 (D) - D22-16 (GND)

L - B

Diagnostic tester communication

Without communication

Below 1 V

D22-9 (D) - D22-16 (GND)

L - B

Diagnostic tester communication

During communication

Pulse generation

D22-7 (CTY) - D22-16 (GND)

G - B

Door courtesy signal

Switch pushed

11 to 14 V

D22-7 (CTY) - D22-16 (GND)

G - B

Door courtesy signal

Switch free

Below 1 V

D22-8 (IND) - D22-16 (GND)

Y - B

Security indicator signal

Ignition switch off, security indicator light blinks

Alternating between 11 to 14 V and below 1 V

D22-8 (IND) - D22-16 (GND)

Y - B

Security indicator signal

Ignition switch ON, security indicator light off

Below 1 V

If the result is not as specified, the transponder key ECU assembly may have a malfunction.

(e) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)


Tester Connection

D22-4 (TXCT) - D22-5 (AGND)

Tool Setting

2 V/DIV., 10 ms./DIV.

Condition

Key is in ignition key cylinder

(2) Waveform 2 (Reference)


Tester Connection

D22-15 (CODE) - D22-5 (AGND)

Tool Setting

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

Condition

Key is in ignition key cylinder

(3) Waveform 3 (Reference)


Tester Connection

D22-13 (EFIO) - D22-16 (GND)

Tool Setting

2 V/DIV., 1 s./DIV.

Condition

Ignition switch ON

(4) Waveform 4 (Reference)


Tester Connection

D22-12 (EFII) - D22-16 (GND)

Tool Setting

5 V/DIV., 500 ms/DIV.

Condition

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

3. 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

Transponder key ECU output signal

Ignition switch off

11 to 14 V

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

BR - W

Transponder key ECU output signal

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

Pulse generation

(See waveform 1)

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

G - W

Transponder key ECU input signal

Ignition switch off

Below 1 V

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

G - W

Transponder key ECU input signal

Ignition switch ON

Pulse generation

(See waveform 2)

(b) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)


Tester Connection

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

Tool Setting

5 V/DIV., 500 ms/DIV.

Condition

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

(2) Waveform 2 (Reference)


Tester Connection

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

Tool Setting

2 V/DIV., 1 s./DIV.

Condition

Ignition switch ON

4. 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

Ignition 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 Ignition 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

Ignition switch off

11 to 14 V

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

G - BR

Certification ECU (smart key ECU assembly) input signal

Ignition switch on (IG)

Pulse generation

(See waveform 2)

(b) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)


Tester Connection

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

Tool Setting

5 V/DIV., 500 ms/DIV.

Condition

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

(2) Waveform 2 (Reference)


Tester Connection

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

Tool Setting

2 V/DIV., 1 s./DIV.

Condition

Ignition switch ON

5. 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 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

Ignition switch ON, security indicator light off

11 to 14 V

F2-14 (LP) - Body ground

Y - Body ground

Security indicator light signal

Ignition switch off, security indicator light blinks

Alternating between 11 to 14 V and below 1 V

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

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