Toyota Venza: Terminals Of Ecu

Toyota Venza Service Manual / Theft Deterrent / Keyless Entry / Engine Immobiliser System(w/ Smart Key System) / 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.

(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.

(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.

(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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