Dtc P0500 [Lf] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Is there continuity?
INSPECT FAN CONTROL MODULE
• Perform fan control module inspection.
8
• Is fan control module normal?
VERIFY TROUBLESHOOTING OF DTC
P0480 COMPLETED
• Clear the DTC from the PCM memory using
the WDS or equivalent.
9
• Start the engine.
• Turn A/C switch to ON.
• Is same DTC present?
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
10
(See AFTER REPAIR PROCEDURE
• Are any DTC present?
DTC P0500
• The PCM monitors the vehicle speed from the ABS HU/CM or DSC HU/CM. If the
PCM dose not receive the input vehicle speed signal, the PCM determines that the
VSS circuit problem.
Diagnostic support note
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction condition in two
DETECTION
consecutive drive cycles or in one drive cycle while the DTC for the same
CONDITION
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.
• VSS circuit malfunction
POSSIBLE
CAUSE
Diagnostic procedure
STEP INSPECTION
Downloaded from
[LF].)

DTC P0500 [LF]

VSS circuit problem
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Yes Go to the next step.
Replace the fan control module, then go to
No
the next step.
Replace the PCM, then go to the next step.
Yes
(See PCM REMOVAL/INSTALLATION
[LF].)
No Go to the next step.
Go to the applicable DTC inspection.
Yes
(See DTC TABLE [LF].)
No Troubleshooting completed.
ACTION
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B3E010201087W01