Lexus IS250 IS220d GSE20 ALE20 4GR-FSE ENGINE CONTROL SYSTEM
INSPECT SPEEDOMETER (METER OPERATION)
DTC P0500 Vehicle Speed Sensor "A"
DESCRIPTION
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.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0500 | Vehicle speed signal from vehicle speed sensor is cut for 0.14 sec. or more while cruise control is in operation | Vehicle speed sensor Vehicle speed sensor signal circuit Combination meter ECM |
WIRING DIAGRAM
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 .
| 1.INSPECT SPEEDOMETER (METER OPERATION) |
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.
|
| ||||
| OK | |
| 2.INSPECT ECM |
Shift the lever to the neutral position.
Jack up the vehicle.
Turn the ignition switch ON.
Measure the voltage of the ECM connectors as the wheel is turned slowly.
- Standard:
Tester Connection Specified Condition A5-22 (SPD) - E4-7 (E1) Generated intermittently
- HINT:
- The output voltage should fluctuate up and down similarly to the diagram on the left when the wheel is turned slowly.
|
| ||||
| OK | ||
| ||