Toyota Venza: Terminals Of Ecu

Toyota Venza Service Manual / Networking / Lin Communication System / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 2A and 2C main body ECU (driver side junction block) connectors.

(b) Disconnect the 2F main body ECU connector.

HINT:

Measure the values on the wire harness side with the connectors disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
2C-24 (BECU) - Body ground	L - Body ground	Battery power supply	Always	11 to 14 V
2A-1 (ACC) - Body ground	B - Body ground	ACC power supply	Always	11 to 14 V
2F-16 (GND1) - Body ground	W-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) Reconnect the 2A and 2C main body ECU (driver side junction block assembly) connectors.

(e) Reconnect the 2F main body ECU (driver side junction block assembly) connector.

(f) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D48-10 (LIN2) - 2F-16 (GND1)	P - W-B	LIN communication line	Ignition switch ON	Pulse generation

If the result is not as specified, the main body ECU (driver side junction block assembly) may be malfunctioning.

2. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for DRIVER SIDE)

(a) Disconnect the I4 power window regulator motor assembly (for driver side) 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 the connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I4-2 (B) - I4-1 (GND)	P - W-B	Battery power supply	Always	11 to 14 V
I4-1 (GND) - Body ground	W-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) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I4-9 (LIN) - I4-1 (GND)	P - W-B	LIN communication line	Ignition switch ON	Pulse generation

If the result is not as specified, the power window regulator motor assembly (for driver side) may be malfunctioning.

3. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for FRONT PASSENGER SIDE)

(a) Disconnect the H4 power window regulator motor assembly (for front passenger side) 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 the connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
H4-2 (B) - H4-1 (GND)	GR - W-B	Battery power supply	Always	11 to 14 V
H4-1 (GND) - Body ground	W-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) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
H4-9 (LIN) - H4-1 (GND)	BR - W-B	LIN communication line	Ignition switch ON	Pulse generation

If the result is not as specified, the power window regulator motor assembly (for front passenger side) may be malfunctioning.

4. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for REAR RH SIDE)

(a) Disconnect the J2 power window regulator motor assembly (for rear RH side) 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 the connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
J2-2 (B) - J2-1 (GND)	Y - W-B	Battery power supply	Always	11 to 14 V
J2-1 (GND) - Body ground	W-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) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
J2-9 (LIN) - J2-1 (GND)	V - W-B	LIN communication line	Ignition switch ON	Pulse generation

If the result is not as specified, the power window regulator motor assembly (for rear RH side) may be malfunctioning.

5. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for REAR LH SIDE)

(a) Disconnect the K2 power window regulator motor assembly (for rear LH side) 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 the connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
K2-2 (B) - K2-1 (GND)	GR - W-B	Battery power supply	Always	11 to 14 V
K2-1 (GND) - Body ground	W-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) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
K2-9 (LIN) - K2-1 (GND)	LG - W-B	LIN communication line	Ignition switch ON	Pulse generation

If the result is not as specified, the power window regulator motor assembly (for rear LH side) may be malfunctioning.

6. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Disconnect the I6 multiplex network master switch 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 the connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I6-11 (B) - I6-12 (E)	GR - W-B	Battery power supply	Always	11 to 14 V
I6-12 (E) - Body ground	W-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) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I6-17 (LIN1) - I6-12 (E)	L - W-B	LIN communication line	Ignition switch ON	Pulse generation

If the result is not as specified, the multiplex network master switch assembly may be malfunctioning.

7. CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) [w/ Sliding Roof]

(a) Disconnect the P4 sliding roof ECU (sliding roof drive gear 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 the connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
P4-1 (B) - P4-2 (E)	R - W-B	Battery power supply	Always	11 to 14 V
P4-2 (E) - Body ground	W-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) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
P4-4 (LIN) - P4-2 (E)	P - W-B	LIN communication line	Ignition switch ON	Pulse generation

If the result is not as specified, the sliding roof ECU (sliding roof drive gear assembly) may be malfunctioning.

8. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) [w/ Smart Key System]

(a) Disconnect the D25 certification ECU (smart key ECU 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 the connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D25-1 (+B) - D25-15 (E)	G - B	Battery 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 voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D25-16 (IG) - D25-15 (E)	R - B	Engine switch power supply	Ignition switch ON	11 to 14 V
D25-16 (IG) - D25-15 (E)	R - B	Engine switch power supply	Ignition switch off	Below 1 V
D25-29 (LIN) - D25-15 (E)	P - B	LIN communication line	Ignition switch ON	Pulse generation

If the result is not as specified, the certification ECU (smart key ECU assembly) may be malfunctioning.

9. CHECK POWER MANAGEMENT CONTROL ECU (w/ Smart Key System)

(a) Disconnect the D43 power management control ECU 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 the connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D43-1 (AM22) - D43-6 (GND)	LG - W	Battery power supply	Always	11 to 14 V
D43-2 (AM21) - D43-6 (GND)	Y - W	Battery power supply	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

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D43-24 (LIN2) -D43-6 (GND)	BR - W	LIN communication line	Ignition switch ON	Pulse generation

If the result is not as specified, the power management control ECU connector.

10. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) [w/ Smart Key System]

(a) Disconnect the D17 steering lock ECU (steering lock actuator 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 the connector disconnected.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D17-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
D17-6 (IG2) - D17-1 (GND)	LG - W-B	Engine switch power supply	Ignition switch ON	11 to 14 V
D17-6 (IG2) - D17-1 (GND)	LG - W-B	Engine switch power supply	Ignition switch off	Below 1 V
D17-7 (B) - D17-1 (GND)	P - W-B	Battery power supply	Always	11 to 14 V

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

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
D17-5 (LIN) - D17-1 (GND)	L - W-B	LIN communication line	Ignition switch ON	Pulse generation

If the result is not as specified, the steering lock ECU (steering lock actuator assembly) may be malfunctioning.

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