METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: DESCRIPTION (2008 Sequoia)

Last Modified: 11-29-2007		1.6 J
Service Category: Vehicle Interior	Section: Meter/Gauge/Display
Model Year: 2008	Model: Sequoia	Doc ID: RM000002ZM6006X
Title: METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM: DESCRIPTION (2008 Sequoia)

Speedometer Malfunction

DESCRIPTION

The combination meter receives vehicle speed signals from the skid control ECU via the CAN line. The vehicle speed sensor detects the voltage that varies according to the vehicle speed. 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.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

CHECK DTC

(a) Use the Techstream to check if the CAN communication system is functioning normally .

Result

Result	Proceed to
CAN communication DTC is not output	A
CAN communication DTC is output	B

2.	CHECK SFI SYSTEM (VEHICLE SPEED)

(a) Use the Techstream to check if the SFI system is functioning normally .

Result

Result	Proceed to
SFI system DTC is not output	A
SFI system (for 2UZ-FE) DTC is output	B
SFI system (for 3UR-FE) DTC is output	C

3.	PERFORM ACTIVE TEST USING TECHSTREAM (SPEEDOMETER)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

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

(e) According to the display on the Techstream, perform the Active Test.

Combination Meter

Tester Display	Test Part	Control Range	Diagnostic Note
Speed Meter Operation	Speedometer	0, 40, 80, 120, 160, 200, 240 or 280	-

OK:

Needle indication is normal.

HINT:

Confirm that the vehicle is stopped and engine is idling. It is normal that door will be locked automatically when performing the speedometer Active Test.
The displayed value has the same units (km/h, mph) as the main scale of the vehicle speedometer.
The needle position should be within the acceptable tolerance.

4.	READ VALUE USING TECHSTREAM (VEHICLE SPEED)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

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

(e) According to the display on the Techstream, read the Data List.

Combination Meter

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Vehicle Speed Meter	Vehicle speed/Min.: 0 (0), Max.: 255 (158)	Almost same as actual speed (when driving)	Unit: km/h (mph)

OK:

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

5.	READ VALUE USING TECHSTREAM (WHEEL SPEED SENSOR)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

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

(e) According to the display on the Techstream, read the Data List.

ABS/VSC/TRAC

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
(FL/FR/RL/RR) Wheel Speed	Wheel speed sensor (FL/FR/RL/RR) reading/Min.: 0 (0), Max.: 326 (202)	Actual wheel speed	Similar speed as indicated on speedometer

OK:

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