Toyota Venza: Back Door Closer Operation Malfunction (B2250)

Toyota Venza Service Manual / Door / Hatch / Back Door Closer System / Back Door Closer Operation Malfunction (B2250)

DESCRIPTION

The power back door ECU (power back door motor unit)*1 or back door closer ECU (multiplex network door ECU)*2 receives signals from the latch switch, sector switch and back door courtesy switch, which are built into the back door lock. Based on these switch signals, the latch position of the back door lock is determined.

DTC No.	DTC Detection Condition	Trouble Area
B2250	While the back door closer is operating, a malfunction is detected in position information from the sector switch within a specified amount of time.	Back door lock assembly Wire harness or connector Power back door ECU (Power back door motor unit)1 Back door closer ECU (Multiplex network door ECU)2

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

WIRING DIAGRAM

PROCEDURE

1.	INSPECT BACK DOOR LOCK ASSEMBLY (SECTOR SWITCH)

(a) Remove the back door lock assembly (See page ).

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

Standard Resistance:

Sector Switch

Tester Connection	Condition	Specified Condition
6 (DLSW) - 4 (E)	Sector gear in neutral position (Sector switch on)	Below 1 Ω
6 (DLSW) - 4 (E)	Sector gear not in neutral position (Sector switch off)	10 kΩ or higher

Text in Illustration

Component without harness connected

(Back Door Lock Assembly)

Sector Gear

Sector Switch

REPLACE BACK DOOR LOCK ASSEMBLY

2.	CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK - POWER BACK DOOR ECU OR BACK DOOR CLOSER ECU)

(a) w/ Power Back Door System

(1) Disconnect the R1 back door lock assembly connector and L20 power back door ECU connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
R1-6 (DLSW) - L20-24 (POS)	Always	Below 1 Ω
R1-4 (E) - Body ground	Always	Below 1 Ω
R1-6 (DLSW) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Back Door Lock)

Front view of wire harness connector

(to Power Back Door ECU)

(b) w/o Power Back Door System

(1) Disconnect the R1 back door lock assembly connector and L21 back door closer ECU connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
R1-6 (DLSW) - L21-7 (POS)	Always	Below 1 Ω
R1-4 (E) - Body ground	Always	Below 1 Ω
R1-6 (DLSW) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Back Door Lock)

Front view of wire harness connector

(to Back Door Closer ECU)

Result	Proceed to
NG	A
OK (w/ Power Back Door System)	B
OK (w/o Power Back Door System)	C

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE POWER BACK DOOR ECU (POWER BACK DOOR MOTOR UNIT)

REPLACE BACK DOOR CLOSER ECU (MULTIPLEX NETWORK DOOR ECU)

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DESCRIPTION When the back door cannot be opened, one of the following may be malfunctioning: 1) power back door ECU (power back door motor unit)*1 or back door closer ECU (multiplex network door ...

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