Toyota Venza manuals

Toyota Venza: Speedometer Malfunction

DESCRIPTION

The meter CPU receives vehicle speed signals from the skid control ECU via the CAN communication system (CAN No. 1 Bus). The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid control ECU supplies power to the vehicle speed sensor. The skid control ECU detects vehicle speed signals based on the pulses of the voltage.

HINT:

  • Factors that affect the indicated vehicle speed include tire size, tire inflation, and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using a speedometer tester (calibrated chassis dynamometer). For details about testing and the margin of error, see the reference chart (See page ).

  • If the vehicle speed sensor circuit has a malfunction, the skid control ECU outputs the DTCs. Refer to troubleshoot Brake Control System (See page ).

WIRING DIAGRAM


CAUTION / NOTICE / HINT

NOTICE:

If the vehicle speed is outside the allowable range when tested, perform the following procedure (See page ).


HINT:

Before starting the following inspection, check tire size and tire air pressure.

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication DTC is output (See page ).


Result

Proceed to

CAN communication DTC is not output.

A

CAN communication DTC is output.

B


B

GO TO CAN COMMUNICATION SYSTEM


A

2.

PERFORM ACTIVE TEST USING TECHSTREAM (SPEED METER OPERATION)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(e) Check the operation by referring to the table below.

Combination Meter

Tester Display

Test Part

Control Range

Diagnostic Note

Speed Meter Operation

Speedometer

0, 40, 80, 120, 160, 200, 240 km/h

Confirm that the vehicle is stopped with the engine idling

Acceptable range (km/h): [Control range → Speedometer display]

  • 40 → 38.0 to 42.0
  • 80 → 78.0 to 84.0
  • 120 → 119.0 to 125.0
  • 160 → 159.0 to 167.0
  • 200 → 199.0 to 209.0
  • 240 → 239.0 to 251.0

OK:

Speedometer indication is normal.


NG

REPLACE COMBINATION METER ASSEMBLY


OK

3.

READ VALUE USING TECHSTREAM (VEHICLE SPEED METER)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

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

(e) Check the values by referring to the table below.

Combination Meter

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Vehicle Speed Meter

Vehicle speed/Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)

Almost the same as actual vehicle speed (Speedometer tester)

-

OK:

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


OK

REPLACE COMBINATION METER ASSEMBLY


NG

4.

READ VALUE USING TECHSTREAM (FR/FL/RR/RL WHEEL SPEED)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / ABS/VSC/TRAC / Data List.

(e) Check the values by referring to the table below.

ABS/VSC/TRAC

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

FR Wheel Speed

Vehicle speed/Min.: 0 mph (0 km/h), Max.: 202 mph (326 km/h)

Almost the same as actual vehicle speed (Speedometer tester)

-

FL Wheel Speed

Vehicle speed/Min.: 0 mph (0 km/h), Max.: 202 mph (326 km/h)

Almost the same as actual vehicle speed (Speedometer tester)

-

RR Wheel Speed

Vehicle speed/Min.: 0 mph (0 km/h), Max.: 202 mph (326 km/h)

Almost the same as actual vehicle speed (Speedometer tester)

-

RL Wheel Speed

Vehicle speed/Min.: 0 mph (0 km/h), Max.: 202 mph (326 km/h)

Almost the same as actual vehicle speed (Speedometer tester)

-

OK:

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


NG

GO TO BRAKE CONTROL SYSTEM


OK

5.

REPLACE SKID CONTROL ECU

(a) Replace the skid control ECU with a new or a known good one (See page ).


OK:

The operation of the speedometer returns to normal.


OK

END


NG

REPLACE COMBINATION METER ASSEMBLY

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