Mazda 3 - Dtc P2503 [Lf]

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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433
8
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See AFTER REPAIR PROCEDURE
[LF].)
• Is there any DTC present?
Yes
Go to applicable DTC troubleshooting.
(See DTC TABLE [LF].)
No
Troubleshooting completed.
DTC P2503 [LF]
B3E010201083W04
DTC P2503
Charging system voltage low
DETECTION
CONDITION
• PCM needs more than 20 A from generator, and judges generator output
voltage to be below 8.5 V during engine running.
POSSIBLE CAUSE
• Generator malfunction
• PCM and/or generator are poorly connected
• Open and/or short to GND in wiring from between generator terminal P and
PCM terminal 2AM
• Open and/or short to GND in wiring from between generator terminal D and
PCM terminal 2AQ
• Drive belt misadjustment
Diagnostic procedure
STEP
INSPECTION
ACTION