Toyota Venza: Terminals Of Ecu

Toyota Venza Service Manual / Theft Deterrent / Keyless Entry / Smart Key System(for Start Function) / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK POWER MANAGEMENT CONTROL ECU

(a) Disconnect the D42 and D43 connectors.

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
D42-2 (STA) - Body ground	P - Body ground	Starter relay operation signal	Always	93.8 to 136.4 Ω
D42-3 (STAR) - Body ground	G - Body ground	Park neutral position switch signal	Shift lever in P or N	93.8 to 136.4 Ω
D42-3 (STAR) - Body ground	G - Body ground	Park neutral position switch signal	Shift lever in except P or N	10 kΩ or higher
D42-8 (IG2D) - Body ground	GR - Body ground	IG2 relay operation signal	Always	131 to 230 Ω
D42-10 (STP1) - Body ground	V - Body ground	Stop light switch signal	Brake pedal depressed	11 to 14 V
D42-10 (STP1) - Body ground	V - Body ground	Stop light switch signal	Brake pedal released	Below 1 V
D43-1 (AM22) - Body ground	LG - Body ground	+B power supply	Always	11 to 14 V
D43-2 (AM21) - Body ground	Y - Body ground	+B power supply	Always	11 to 14 V
D43-3 (SLP) - Body ground	G - Body ground	Steering lock actuator position signal	Always	10 kΩ or higher
D43-5 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
D43-6 (GND) - Body ground	W - Body ground	Ground	Engine switch not pushed	10 kΩ or higher
D43-8 (SLR+) - Body ground	R - Body ground	Steering lock motor signal	Always	10 kΩ or higher
D43-11 (CA3N) - Body ground	W - Body ground	CAN communication line	Always	10 kΩ or higher
D43-12 (CA3P) - Body ground	G - Body ground	CAN communication line	Always	10 kΩ or higher
D43-13 (CA1L) - Body ground	W - Body ground	CAN communication line	Always	10 kΩ or higher
D43-14 (CA1H) - Body ground	Y - Body ground	CAN communication line	Always	10 kΩ or higher
D43-17 (SSW2) - Body ground	V - Body ground	Engine switch signal	Engine switch pushed	Below 1 Ω
D43-17 (SSW2) - Body ground	V - Body ground	Engine switch signal	Engine switch not pushed	10 kΩ or higher
D43-18 (SSW1) - Body ground	L - Body ground	Engine switch signal	Engine switch pushed	Below 1 Ω
D43-20 (IG1D) - Body ground	V - Body ground	IG1 relay operation signal	Always	50.625 to 61.875 Ω
D43-24 (LIN2) - Body ground	BR - Body ground	LIN communication line	Always	10 kΩ or higher

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

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
D42-4 (NE) - D43-6 (GND)	GR - W	Crankshaft position sensor signal	Idling with warm engine	Pulse generation (See waveform 1)
D42-8 (IG2D) - D43-6 (GND)	GR - W	IG2 signal	Engine switch on (IG)	Output voltage at terminal AM21 or AM22 is -2 V or more
D42-8 (IG2D) - D43-6 (GND)	GR - W	IG2 signal	Engine switch on (ACC)	Below 1 V
D43-3 (SLP) - D43-6 (GND)	G - W	Steering lock actuator signal	Steering lock released	Pulse generation (See waveform 2)
D43-3 (SLP) - D43-6 (GND)	G - W	Steering lock actuator signal	Shift lever in P Steering lock locked	Pulse generation (See waveform 2)
D43-8 (SLR+) - D43-6 (GND)	R - W	Steering motor signal	Steering lock motor operating	Below 1 V
D43-8 (SLR+) - D43-6 (GND)	R - W	Steering motor signal	Steering lock motor not operating	11 to 14 V
D43-2 (INDW) - D43-6 (GND)	GR - W	Warning signal	Brake pedal depressed, shift lever in P, engine switch on (ACC, IG)	8 to 14 V
D43-16 (P) - D43-6 (GND)	R - W	Shift lock signal	Shift lever in P	8 to 14 V
D43-16 (P) - D43-6 (GND)	R - W	Shift lock signal	Shift lever not in P	Below 1 V
D43-17 (SSW2) - D43-6 (GND)	V - W	Engine switch signal	Engine switch not pushed	Output voltage at terminal AM21 or AM22 is -2 V or more
D43-17 (SSW2) - D43-6 (GND)	V - W	Engine switch signal	Engine switch pushed	Below 1 V
D43-18 (SSW1) - D43-6 (GND)	L - W	Engine switch signal	Engine switch not pushed	Output voltage at terminal AM21 or AM22 is -2 V or more
D43-18 (SSW1) - D43-6 (GND)	L - W	Engine switch signal	Engine switch pushed	Below 1 V
D43-19 (ACCD) - D43-6 (GND)	G - W	ACC signal	Engine switch on (ACC)	8 to 14 V
D43-19 (ACCD) - D43-6 (GND)	G - W	ACC signal	Engine switch off	Below 1 V
D43-20 (IG1D) - D43-6 (GND)	V - W	IG1 signal	Engine switch on (IG)	8 to 14 V
D43-20 (IG1D) - D43-6 (GND)	V - W	IG1 signal	Engine switch on (ACC)	Below 1 V
D43-22 (INDS) - D43-6 (GND)	Y - W	Vehicle condition signal	Brake pedal depressed, shift lever in P	8 to 14 V
D43-23 (SUT) - D43-6 (GND)	L - W	Vehicle speed signal	Engine switch on (IG), wheel rotated slowly	Pulse generation (See waveform 3)

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

(e) Using an oscilloscope, check the signal waveform of the ECU.

(1) Waveform 1

Tester Connection	D42-4 (NE) - D43-6 (GND)
Tool Setting	5 V/DIV., 2 ms./DIV.
Vehicle Condition	Idling with warm engine

HINT:

The wavelength becomes shorter as the engine speed increases.

(2) Waveform 2

Tester Connection	D42-3 (SLP) - D43-6 (GND)
Tool Setting	2 V/DIV., 100 ms./DIV.
Vehicle Condition	Steering lock/unlock

(3) Waveform 3

Tester Connection	D43-23 (SUT) - D43-6 (GND)
Tool Setting	5 V/DIV., 10 ms./DIV.
Vehicle Condition	Driving at approx. 20 km/h (12 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the D25 connector.

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

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
D25-1 (+B) - Body ground	G - Body ground	+B power supply	Always	11 to 14 V
D25-11 (SWIL) - Body ground	R - Body ground	Illumination signal	Light control switch tail or head	8 to 14 V
D25-15 (E)- Body ground	B - Body ground	Ground	Always	Below 1 Ω
D25-16 (IG) - Body ground	R - Body ground	IG power supply	Engine switch on (IG)	11 to 14 V
D25-29 (LIN) - Body ground	P - Body ground	LIN communication line	Always	10 kΩ or higher

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
D25-11 (SWIL) - Body ground	R - Body ground	Illumination signal	Light control switch tail or head	8 to 14 V

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

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

(a) Disconnect the D17 ECU connector.

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

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 on (IG)	11 to 14 V
D17-6 (IG2) - Body ground	LG - Body ground	Ignition power supply	Engine switch off	Below 1 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 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
D17-4 (SLP1) - D17-1 (GND)	V - W-B	Steering lock actuator position signal	Steering locked	11 to 14 V
D17-4 (SLP1) - D17-1 (GND)	V - W-B	Steering lock actuator position signal	Steering released	Below 1 V

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

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