Toyota Venza: System Description

Toyota Venza Service Manual / Door / Hatch / Back Door Closer System / System Description

SYSTEM DESCRIPTION

1. BACK DOOR CLOSER SYSTEM DESCRIPTION

(a) Operating any power back door switch when the back door is fully closed inputs a request signal to the power back door ECU*1 or back door closer ECU*2. The power back door ECU*1 or back door closer ECU*2 outputs a "latch release" command to the back door lock in response to the input.

(b) The latch can be released only when the back door is unlocked.

(c) 3 switches are built into the back door lock, and the power back door ECU*1 or back door closer ECU*2 monitors each switch status. The power back door ECU*1 or back door closer ECU*2 controls latch "release/ close" operations in response to the inputs from each switch.

Switch	Function
Back door courtesy switch	Detects whether back door is open or closed. This switch turns on when back door is open or ajar and turns off when it is fully closed.
Latch switch	Detects fully closed position of latch. This switch turns on when latch is in over-latch position.
Sector switch	Detects ajar position of latch. This switch turns on when latch is in open-latch position.

*1: w/ Power Back Door System
*2: w/o Power Back Door System

System Diagram

SYSTEM DIAGRAM Communication Method Transmitting ECU Receiver Signal Communication Method Main body ECU (Driver Side Junction Block Asse ...

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: The back door closer system troubleshooting procedure is based on the premise that the power back door system is operating normally. Check the power bac ...

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Terminals Of Ecu
TERMINALS OF ECU 1. CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) (a) Disconnect the 2F and 2C driver side junction block connectors. (b) Disconnect the D50 and D51 main body ECU connectors. (c) Measure the resistance and voltage according to ...

Initialization
INITIALIZATION 1. RESET BACK DOOR CLOSE POSITION NOTICE: Perform initialization of the power back door system (power back door ECU initialization) if one of the following is performed: The cable is disconnected from the negative (-) battery termin ...

Precaution
PRECAUTION 1. NOTICE FOR INITIALIZATION CAUTION: When disconnecting the cable from the negative (-) battery terminal, initialize the following system after the cable is reconnected. System Name See Procedure Back Do ...