Mazda 3 Workshop Manual page 355

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
DETECTION
CONDITION
POSSIBLE CAUSE
Diagnostic procedure
STEP
1
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• The PCM monitors the input voltages from the fan control module. If the
voltage at PCM terminal 1W remains low or high, the PCM determines that
fan control circuit has malfunction.
Diagnostic support note
• This is an continuous monitor (other).
• The MIL does not illuminate.
• FREEZE FRAME DATA is not available.
• The DTC is stored in the PCM memory.
• Connector or terminal malfunction
• Short to power supply in wiring harness between fan control module
terminal B and PCM terminal 1W
• Short to ground in wiring harness between fan control module terminal B
and PCM terminal 1W
• Open circuit in wiring harness between fan control module terminal B and
PCM terminal 1W
• Fan control module malfunction
• PCM malfunction
INSPECTION
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ACTION
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