Toyota Venza: Terminals Of Ecu

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

(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.

(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.

(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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