Toyota Venza manuals

Toyota Venza: 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.

(c) Reconnect the D42 and D43 connectors.

(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.

(c) Reconnect the D25 connector.

(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.

(c) Reconnect the D17 ECU connector.

(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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