Engine Control System

DTC P0500 Vehicle Speed Sensor "A"
DTC P0503 Vehicle Speed Sensor "A" Intermittent / Erratic / High

DESCRIPTION

DTC Detection Condition:

The vehicle speed sensor outputs a 4 pulse signal for every revolution of the rotor shaft, which is rotated by the transmission output shaft via the driven gear. The ECM determines the vehicle speed based on this signal.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunctions Thresholds:

Component Operating Range:

The ECM assumes that the vehicle is being driven when the engine RPM is more than 2,000 rpm and the Park/Neutral Position (PNP) switch was turned OFF (for 30 seconds). If there is no signal from the vehicle speed sensor when the vehicle is being driven, the ECM interprets this as a malfunction in the vehicle speed sensor. The ECM illuminates the Malfunction Indicator Lamp (MIL) and sets a DTC.

Wiring Diagram:

Step 1:

Step 1(Continued)-2:

Step 3-4:

Step 5-6:

INSPECTION PROCEDURE

HINT: Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.