Toyota Venza manuals

Toyota Venza: Power Source Mode does not Change to ON (IG and ACC)

DESCRIPTION

When the engine switch is pushed with the electrical key in the cabin, the power management control ECU receives signals to change the power source mode.

HINT:

To allow use of the Techstream to inspect the push-button start function when the power source mode is off, repeat opening and closing any of the doors. Opening and closing a door establishes communication between the Techstream and the power management control ECU. (Opening and closing a door can also be simulated by operating a door courtesy light switch.)

WIRING DIAGRAM


PROCEDURE

1.

CHECK DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the Techstream on.

(c) Turn on and off any of the door courtesy light switches repeatedly at 1.5-second intervals or less until communication between the Techstream and vehicle starts.

(d) Enter the following menus: Body Electrical / All ECUs / Health Check.

(e) Clear the DTC.

(f) Check for DTCs again.

OK:

DTCs are not output.


NG

GO TO DIAGNOSTIC TROUBLE CODE CHART


OK

2.

CHECK SMART KEY SYSTEM

(a) Remove the battery of the electrical key transmitter (See page ).



(b) Touch the logo side mark of the key or card key to the engine switch.

(c) Check that the engine switch can be turned on (IG).

OK:

Power source mode can be changed.


NG

GO TO DIAGNOSIS PROCEDURE (Room Oscillator does not Recognize Key)


OK

3.

CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)


OK

4.

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)


OK

5.

READ VALUE USING TECHSTREAM

(a) Reconnect the D42 connector to the power management control ECU.

(b) Enter the following menus: Body Electrical / Power Source Control / Data List.

(c) Read the Data List according to the display on the Techstream.

Power Source Control

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Start Switch1

Start switch 1/ON or OFF

ON: Engine switch pushed

OFF: Engine switch not pushed

-

Start Switch2

Start switch 2/ON or OFF

ON: Engine switch pushed

OFF: Engine switch not pushed

-

OK:

ON (engine switch is pushed) and OFF (engine switch is not pushed) appear on the screen.


OK

REPLACE POWER MANAGEMENT CONTROL ECU


NG

6.

INSPECT ENGINE SWITCH

(a) Remove the engine switch (See page ).



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

Standard Resistance:

Tester Connection

Condition

Specified Condition

7 (SS1) - 5 (GND)

Pushed

Below 1 Ω

2 (SS2) - 5 (GND)

Pushed

Below 1 Ω

7 (SS1) - 5 (GND)

Not pushed

10 kΩ or higher

2 (SS2) - 5 (GND)

Not pushed

10 kΩ or higher

Text in Illustration

*1

Component without harness connected

(Engine Switch)

(c) Proceed to next step based on the inspection result.

Result

Proceed to

OK

A

NG

B

NG

C


B

REPLACE ENGINE SWITCH (for 2ZR-FE)


C

REPLACE ENGINE SWITCH (for 1AR-FE)


A

7.

CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - POWER MANAGEMENT CONTROL ECU AND BODY GROUND)

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


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D13-7 (SS1) - D43-18 (SSW1)

Always

Below 1 Ω

D13-7 (SS1) - Body ground

Always

10 kΩ or higher

D13-2 (SS2) - D43-17 (SSW2)

Always

Below 1 Ω

D13-2 (SS2) - Body ground

Always

10 kΩ or higher

Text in Illustration

*1

Front view of wire harness connector

(to Engine Switch)

*2

Front view of wire harness connector

(to Power Management Control ECU)


OK

REPLACE POWER MANAGEMENT CONTROL ECU


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE SWITCH - POWER MANAGEMENT CONTROL ECU OR BODY GROUND)

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