Toyota Venza: Vehicle Speed Signal Malfunction (B2282)

Toyota Venza Service Manual / Theft Deterrent / Keyless Entry / Smart Key System(for Start Function) / Vehicle Speed Signal Malfunction (B2282)

DESCRIPTION

The power management control ECU receives vehicle speed information using 2 methods. It receives a speed signal from the meter ECU. It also receives speed information from the meter ECU via CAN. If the information sent using these 2 methods is inconsistent, this DTC will be stored.

DTC No.	DTC Detection Condition	Trouble Area
B2282	Speed information received by the power management control ECU via direct line and via CAN is inconsistent.	CAN communication system Combination meter system Power management control ECU Wire harness or connector

WIRING DIAGRAM

1. for 2GR-FE

2. for 1AR-FE

HINT:

A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter. The signal is changed to a pulse signal at the transistor in the combination meter. Each ECU controls the respective system based on the pulse signal.
If a short occurs in an ECU, all systems in the diagram above will not operate normally.

CAUTION / NOTICE / HINT

NOTICE:

When the power management control ECU is replaced with a new one and the cable from the negative (-) battery terminal is connected, the power source mode becomes the on (IG) mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

(a) Check if CAN communication DTCs are output.

HINT:

If any DTCs for CAN communication system malfunction are output, inspect those DTCs first.

OK:

CAN communication DTC is not output.

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK SPEEDOMETER OPERATION

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Enter the following menus: Body Electrical / Combination Meter / Data List.

(e) Check the Data List for proper functioning of the vehicle speed signal.

Combination Meter

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Vehicle Speed Meter	Vehicle speed/Min.: 0, Max.: 255	Almost same as actual speed (When driving)	-

OK:

Vehicle speed displayed on the Techstream is almost the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).

GO TO METER / GAUGE SYSTEM (Speedometer Malfunction)

3.	READ VALUE USING TECHSTREAM

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

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

Power Source Control

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Vehicle speed signal	Vehicle speed signal/Stop or Run	Sop: Vehicle stopped Run: Vehicle running	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Vehicle speed signal

Vehicle speed signal/Stop or Run

Sop: Vehicle stopped

Run: Vehicle running

OK:

Stop (vehicle is stopped) and Run (vehicle is running) appear on the screen.

REPLACE POWER MANAGEMENT CONTROL ECU

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

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

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

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

6.	CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - POWER MANAGEMENT CONTROL ECU)

(a) Disconnect the E1 connector from the combination meter assembly.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
D43-23 (SUT) - E1-16 (+S)	Always	Below 1 Ω
D43-23 (SUT) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Power Management Control ECU)

Front view of wire harness connector

(to Combination Meter Assembly)

GO TO STEP 8

7.	INSPECT COMBINATION METER ASSEMBLY

(a) Remove the combination meter (See page ).

(b) Reconnect the E1 connector to the combination meter assembly.

(d) Connect an oscilloscope to terminal E1-16 (+S) and body ground.

(e) Turn the engine switch on (IG).

(f) Turn the wheel slowly.

(g) Check the signal waveform according to the condition(s) in the table below.

Item	Condition
Tool setting	5 V/DIV., 20 ms./DIV.
Vehicle condition	Driving at approx. 20 km/h (12 mph)

OK:

The waveform is displayed as shown in the illustration.

Text in Illustration

*1	Component with harness connected (Combination Meter Assembly)

HINT:

When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

REPLACE POWER MANAGEMENT CONTROL ECU

GO TO METER / GAUGE SYSTEM (Speed Signal Circuit)

8.	CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - JUNCTION CONNECTOR)

(a) Disconnect the E31 connector from the junction connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E1-16 (+S) - E31-19	Always	Below 1 Ω
E1-16 (+S) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Combination Meter Assembly)

Front view of wire harness connector

(to Junction Connector)

REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER - JUNCTION CONNECTOR)

9.	CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - JUNCTION CONNECTOR)

(a) Disconnect the D57 connector from the junction connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
D43-23 (SUT) - D57-13	Always	Below 1 Ω
D43-23 (SUT) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Power Management Control ECU)

Front view of wire harness connector

(to Junction Connector)

REPLACE JUNCTION CONNECTOR

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

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