Mazda 6 2002, Workshop Manual

Page: 307 / 1248

ON-BOARD DIAGNOSTIC
F–177
F
End Of Sie
DTC P2503
A6E397001083W09
Diagnostic procedure
6 VERIFY TROUBLESHOOTING OF DTC P2502
COMPLETED
•
Make sure to reconnect all connectors.
•
Clear DTC from memory using WDS or
equivalent.
•
Perform KOER self-test.
(See
F–66 KOEO/KOER SELF-TEST .)
•
Is same DTC present?
Yes Replace PCM, then go to next step.
(See F–43 PCM REMOVAL/INSTALLATION .)
No Go to next step.
7 VERIFY AFTER REPAIR PROCEDURE
•
Perform “After Repair Procedure”.
(See
F–66 AFTER REPAIR PROCEDURE .)
•
Is there any DTC present?
Yes Go to applicable DTC troubleshooting.
(See F–67 DTC TABLE .)
No Troubleshooting completed.
STEP INSPECTION ACTION
DTC P2503 Generator output voltage signal no electricity
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 1AA
•
Open and/or short to GND in wiring from between generator terminal D and PCM terminal 1AD
•
Drive belt misadjustment
STEP INSPECTION ACTION
1 PERFORM DTC CONFIRMATION PROCEDURE
•
Perform DTC CONFIRMATION PROCEDURE.
(See
F–66 DTC CONFIRMATION
PROCEDURE .)
•
Is same DTC present?
Yes Go to next step.
No Intermittent concern exists. Go to INTERMITTENT
CONCERN TROUBLESHOOTING procedure.
(See
F–227 INTERMITTENT CONCERN
TROUBLESHOOTING .)
2 INSPECT DRIVE BELT CONDITION
•
Verify that drive belt auto tensioner indicator
mark does not exceed limit.
•
Is front drive belt okay?
Yes Go to next step.
No Replace and/or adjust drive belt, then go to Step 9.