Cruise Control System

CRUISE CONTROL: CRUISE CONTROL SYSTEM: P0500: Vehicle Speed Sensor Malfunction

DTC P0500 - Vehicle Speed Sensor Malfunction

DTC P0503 - Vehicle Speed Sensor "A" Intermittent / Erratic / High

DESCRIPTION

Refer to DTC P0500 (2GR-FSE) P0500.
The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a 4-pulse signal and outputs it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of these pulse signals.












WIRING DIAGRAM

Refer to DTC P0500 (2GR-FSE) P0500.




INSPECTION PROCEDURE

Refer to DTC P0500 (2GR-FSE) P0500.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using Techstream or the OBD II scan tool. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Freeze Frame Data.

PROCEDURE

1. INSPECT SPEEDOMETER (METER OPERATION)
(a) Drive the vehicle and check if operation of the speedometer in the combination meter is normal.
HINT:
The vehicle speed sensor is operating normally if the speedometer display is normal.

NG -- CHECK SPEEDOMETER CIRCUIT
OK -- Continue to next step.
2. INSPECT ECM




(a) Shift the lever to the neutral position.
(b) Jack up the vehicle.
(c) Turn the engine switch on (IG).




(d) Measure the voltage according to the value(s) in the table below as the wheel is turned slowly.
Standard:





HINT:
The output voltage should fluctuate up and down similarly to the diagram on the left when the wheel is turned slowly.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM