Mazda 3 Workshop Manual page 235

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
DTC P2502
DETECTION
CONDITION
POSSIBLE CAUSE
Diagnostic procedure
STEP INSPECTION
Downloaded from
Charging system voltage problem
• The PCM determines that the generator output voltage is more than 17
V or the battery voltage is less than 11 V while the engine running.
• Generator malfunction
• Battery malfunction
• Connector or terminal malfunction
• Open circuit in wiring harness between generator terminal B and battery
positive terminal
• PCM malfunction
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