Toyota Venza: Power Source Control ECU Malfunction (B2782)

Toyota Venza Service Manual / Steering Column / Steering Lock System / Power Source Control ECU Malfunction (B2782)

DESCRIPTION

The power management control ECU controls the power supply to activate the steering lock motor. This prevents the steering wheel from being locked while the vehicle is moving.

DTC No.	DTC Detecting Condition	Trouble Area
B2782	Steering lock motor drive control circuit is defective.	Wire harness Steering lock ECU (Steering lock actuator assembly) Power management control ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

After replacing the steering lock ECU (steering lock actuator assembly), confirm the Initialization of the steering lock (See page ).

PROCEDURE

1.	INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
D17-3 (IGE) - D17-1 (GND)	Specified condition is checked after performing the following: Turn the engine switch off Turn the engine switch on (ACC or IG)	Motor activated: Below 1 V Motor not activated: 10 to 12 V
D17-3 (IGE) - D17-1 (GND)	Specified condition is checked after performing the following: Move the shift lever to P Turn the engine switch off Open the driver's door	Motor activated: Below 1 V Motor not activated: 10 to 12 V

HINT:

The steering lock ECU and steering lock actuator assembly are supplied as a single unit.

Text in Illustration

*1	Component with harness connected (Steering Lock ECU (Steering Lock Actuator Assembly))

REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

2.	CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BODY GROUND)

(a) Disconnect the D17 connector from the steering lock actuator assembly.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
D17-1 (GND) - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Steering Lock ECU (Steering Lock Actuator Assembly))

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - POWER MANAGEMENT CONTROL ECU)

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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
D17-3 (IGE) - D43-8 (SLR+)	Always	Below 1 Ω
D17-3 (IGE) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Steering Lock ECU (Steering Lock Actuator Assembly))

Front view of wire harness connector

(to Power Management Control ECU)

REPLACE POWER MANAGEMENT CONTROL ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART If a trouble code is displayed during the DTC check, check the parts listed for that code in the table below and proceed to the appropriate page. HINT: The steering ...

Open / Short in Steering Lock ECU (B2781)

DESCRIPTION If the steering lock ECU (steering lock actuator assembly) determines that there is a malfunction inside the ECU, it outputs this DTC. Diagnostic communication between the steering lo ...

Other materials about Toyota Venza:

Removal
REMOVAL PROCEDURE 1. REMOVE REAR DOOR SCUFF PLATE LH 2. DISCONNECT REAR DOOR OPENING TRIM WEATHERSTRIP LH 3. REMOVE TONNEAU COVER ASSEMBLY (w/ Tonneau Cover) 4. REMOVE DECK BOARD ASSEMBLY 5. REMOVE NO. 3 DECK BOARD SUB-ASSEMBLY 6. REMOVE ...

Removal
REMOVAL PROCEDURE 1. REMOVE UPPER BACK WINDOW PANEL TRIM 2. REMOVE BACK DOOR PANEL TRIM ASSEMBLY 3. DISCONNECT POWER BACK DOOR ROD (w/ Power Back Door) 4. REMOVE BACK DOOR TRIM COVER LH (w/o Power Back Door) 5. REMOVE BACK DOOR TRIM COVER LH ...

ECM Power Source Circuit
DESCRIPTION When the ignition switch is turned to ON, the battery voltage is applied to IGSW of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil, closing the contact of the engine room junction block assemb ...