P0500

DTC Code	DTC Name
P0500	Vehicle Speed Sensor

DESCRIPTION

Vehicles, which are equipped with ABS (Anti-lock Brake System), detect the vehicle speed using the skid control ECU (brake actuator assembly) and speed sensor. The speed sensor monitors the wheel rotation speed and sends a signal to the skid control ECU. The skid control ECU converts the wheel speed signal into a 4-pulse signal and transmits it to the ECM via the combination meter assembly. The ECM determines the vehicle speed based on the frequency of the pulse signal.

Tech Tips

Various systems use the vehicle speed signal distributed from the combination meter assembly. Check all the components possibly related to the speed signal.
A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls the respective system based on the pulse signal.
If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems using the speed signal will not operate normally.


*a	4-Pulse
*b	from Wheel Speed Sensor
*c	Skid Control ECU
*d	Combination Meter Assembly

P0500
DTC Detection Drive Pattern	DTC Detection Condition	Trouble Area
Drive the vehicle at 10 km/h (6.3 mph) or more	for Automatic transmission: Condition (a) is met for 5 seconds or more (2 trip detection logic): (a) While vehicle being driven, no vehicle speed sensor signal transmitted to ECM.	Open or short in speed signal circuit Combination meter assembly ECM
Drive the vehicle at 10 km/h (6.3 mph) or more	for Manual transmission: Conditions (a) and (b) are met for 20 seconds or more (2 trip detection logic): (a) The fuel-cut operation is being performed. (b) No speed signal is input to the ECM.

Related Data List
DTC No.	Data List
P0500	Vehicle Speed

WIRING DIAGRAM


*1	from Brake Actuator Assembly
*2	Combination Meter Assembly
*3	to Other ECUs

CAUTION / NOTICE / HINT

Note

After replacing the ECM, the new ECM needs registration (See page ) and initialization Click here.

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE

READ VALUE USING GTS (VEHICLE SPEED)

Connect the GTS to the DLC3.
Start the engine and turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Vehicle Speed.
Drive the vehicle.

Read the value displayed on the GTS.

Result
Result	Proceed to
Values displayed on GTS and speedometer display not equal	A
Values displayed on GTS and speedometer display equal	B

B

CHECK INTERMITTENT PROBLEMS

A

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)

Disconnect the combination meter assembly connector.
Disconnect the ECM connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
G6-32 (+S) - G184-10 (SPD)	Always	Below 1 Ω
G6-32 (+S) or G184-10 (SPD) - Body ground and other terminals	Always	10 kΩ or higher

Reconnect the combination meter assembly connector.
Reconnect the ECM connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

CHECK COMBINATION METER SYSTEM
1. Check the circuits that send vehicle speed signals to this system in the combination meter system Click here.
NEXT
CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
1. Connect the GTS to the DLC3.
2. Clear the DTCs Click here.
3. Turn the engine switch off. for 30 seconds or more.
4. Turn the engine switch on (IG) and turn the GTS on.
5. Start the engine.
6. Drive the vehicle at 10 km/h (6.3 mph) or more.
7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
8. Confirm that the pending DTC is not output again.
NEXT
END

ECD SYSTEM, Diagnostic DTC:P0500