Mazda 3 - Dtc P2503 [Z6]

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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237
• Is same DTC present?
8
VERIFY AFTER REPAIR
PROCEDURE
• Perform the "AFTER REPAIR
PROCEDURE".
(See AFTER REPAIR PROCEDURE
[Z6].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [Z6].)
No
DTC troubleshooting completed.
DTC P2503 [Z6]
B3E010202500W02
DTC P2503
Charging system voltage low
DETECTION
CONDITION
• The PCM needs more than 20 A from the generator, and determines that
the generator output voltage is less than 8.5 V while the engine running.
POSSIBLE CAUSE
• Generator malfunction
• Drive belt misadjustment
• Connector or terminal malfunction
• Open circuit in wiring harness between generator terminal D and PCM
terminal 2AN
• Short to GND in wiring harness between generator terminal D and PCM
terminal 2AN
• Open circuit in wiring harness between generator terminal P and PCM
terminal 2AR
• Short to GND in wiring harness between generator terminal P and PCM
terminal 2AR
• PCM malfunction