Mazda 3 Vehicle speed signal is not input after the following conditions are met and 4.5 s or more have passed.
Mazda EPC2 11.2019 General Parts Catalog Download
- D, or M range switch ON
- P and N position of TR switch OFF
- Engine coolant temperature 60 °C {140 °F} or more
- Turbine speed 1,500 rpm or more
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.
• The PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA is available.
• The AT warning light illuminates.
• The DTC is stored in the PCM memory.
Mazda EPC Software
Possible Cause:
• VSS malfunction
• Open circuit in wiring harness between VSS terminal B and PCM terminal 1AY
• Short to ground in wiring harness between VSS terminal B and PCM terminal 1AY
• Open circuit in wiring harness between VSS terminal A and PCM terminal 1BC
• Short to ground in wiring harness between VSS terminal A and PCM terminal 1BC
• Open circuit in wiring harness between VSS terminal C and body ground
• Damaged connectors between VSS and PCM
• PCM malfunction
Diagnostic procedure
VERIFY STORED DTC IN ABS HU/CM OR DSC HU/CM
• Turn the ignition switch to the ON position (Engine off).
• Verify stored DTCs in ABS HU/CM or DSC HU/CM.
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA been recorded?
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Bulletins and or/on-line repair information availability.
• Is any related repair Information available?
INSPECT VSS CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch to the LOCK position.
• Disconnect the VSS connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is the connection normal?
INSPECT VSS POWER CIRCUIT FOR OPEN CIRCUIT
• Verify that the VSS connector is disconnected.
• Turn the ignition switch to the ON position (engine off).
• Inspect the voltage between VSS terminal A (wiring harness-side) and ground.
• Is the voltage B+?
INSPECT VSS POWER CIRCUIT FOR SHORT TO GROUND
• Turn the ignition switch to the LOCK position.
• Inspect for continuity between VSS terminal A (wiring harness-side) and ground.
• Is there continuity?
INSPECT VSS GROUND CIRCUIT FOR OPEN CIRCUIT
• Verify that the VSS connector is disconnected.
• Inspect for continuity between VSS (wiring harness-side) terminal C and ground.
• Is there continuity?
INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is the connection normal?
INSPECT VEHICLE SPEED SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Disconnect the PCM connector and VSS connector.
• Inspect for continuity between VSS terminal B and PCM terminal 1AY.
• Is there continuity?
INSPECT VEHICLE SPEED SIGNAL CIRCUIT FOR SHORT TO GROUND
• Verity that the VSS connector and PCM connector are disconnected.
• Inspect for continuity between PCM terminal 1AY and body ground.
• Is there continuity?
VERIFY TROUBLESHOOTING OF DTC P0500 COMPLETED
• Make sure to reconnect all the disconnected connectors.
• Clear the DTC from the memory using the WDS or equivalent.
• Warm up engine.
• Drive the vehicle under the following conditions for 4.5 s or more while monitoring PIDs.
- Engine coolant temp: 60 °C {140 °F} or more
- Drive in M range
- Frequency of input/turbine speed sensor: 800 Hz or more
• Is the PENDING CODE present?
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