DTC P0500: Notes

DETECTION CONDITION AND POSSIBLE CAUSE (DTC P0500)

DTC P0500	VSS circuit problem
DETECTION CONDITION	With ABS/DSC If an error in the wheel speed signal from the ABS/DSC HU/CM is detected by CAN when the following conditions are met: Neutral switch and clutch pedal position switch are OFF Load is above 40% Engine speed is 2,000 rpm or above Brake switch is OFF Shift lever position (P, N, R position) (AT) MT without ABS/DSC Vehicle speed signal from vehicle speed sensor is below 3.7 km/h {2.3 mph} when the following conditions are met: Neutral switch and clutch pedal position switch are OFF Load is above 40% Engine speed is 2,000 rpm or above Brake switch is OFF Diagnostic support note This is a continuous monitor (CCM). The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	With ABS/DSC Front ABS wheel-speed sensor malfunction ABS/DSC HU/CM malfunction Connector or terminal malfunction PCM malfunction MT without ABS/DSC VSS malfunction Connector or terminal malfunction Open circuit in wiring harness between PCM terminal 2O and VSS terminal B Open circuit in wiring harness between main relay and VSS terminal A Open circuit in wiring harness between VSS terminal C and body ground Shot to ground in wiring harness between main relay and VSS terminal A Short to ground in wiring harness between PCM terminal 2O and VSS terminal B Short to power supply in wiring harness between PCM terminal 2O and VSS terminal B PCM malfunction
Courtesy of MAZDA MOTORS CORP.

DTC P0500

VSS circuit problem

DETECTION CONDITION

With ABS/DSC

If an error in the wheel speed signal from the ABS/DSC HU/CM is detected by CAN when the following conditions are met:
- Neutral switch and clutch pedal position switch are OFF
- Load is above 40%
- Engine speed is 2,000 rpm or above
- Brake switch is OFF
- Shift lever position (P, N, R position) (AT)

MT without ABS/DSC

Vehicle speed signal from vehicle speed sensor is below 3.7 km/h {2.3 mph} when the following conditions are met:
- Neutral switch and clutch pedal position switch are OFF
- Load is above 40%
- Engine speed is 2,000 rpm or above
- Brake switch is OFF

Diagnostic support note

This is a continuous monitor (CCM).
The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
FREEZE FRAME DATA is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

With ABS/DSC

Front ABS wheel-speed sensor malfunction
ABS/DSC HU/CM malfunction
Connector or terminal malfunction
PCM malfunction

MT without ABS/DSC

VSS malfunction
Connector or terminal malfunction
Open circuit in wiring harness between PCM terminal 2O and VSS terminal B
Open circuit in wiring harness between main relay and VSS terminal A
Open circuit in wiring harness between VSS terminal C and body ground
Shot to ground in wiring harness between main relay and VSS terminal A
Short to ground in wiring harness between PCM terminal 2O and VSS terminal B
Short to power supply in wiring harness between PCM terminal 2O and VSS terminal B
PCM malfunction

Courtesy of MAZDA MOTORS CORP.