Mazda 2002 6 Workshop Manual page 309

DTC P2504 Battery overcharge
Diagnostic procedure
STEP
1 PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
(See F–66 DTC CONFIRMATION
PROCEDURE.)
• Is same DTC present?
2 INSPECT POOR CONNECTION OF
GENERATOR CONNECTOR
• Turn ignition key to OFF.
• Disconnect generator connector.
• Inspect for poor connection
(damaged, pulled-out terminals, corrosion,
etc.).
• Is there a malfunction?
3 CLASSIFY GENERATOR MALFUNCTION OR
OTHER MALFUNCTION
• Turn ignition key to ON (Engine OFF).
• Measure voltage between generator terminal D
(harness-side) and body ground.
• Is voltage B+?
4 INSPECT POOR CONNECTION OF PCM
CONNECTOR
• Turn ignition key to OFF.
• Disconnect PCM connector.
• Inspect for poor connection
(damaged, pulled-out terminals, corrosion,
etc.).
• Is there a malfunction?
5 INSPECT GENERATOR CONTROL CIRCUIT
FOR SHORT TO POWER
• Turn ignition key to ON (engine OFF).
• Measure voltage between generator terminal D
(harness-side) and body ground.
• Is voltage B+?
ON-BOARD DIAGNOSTIC
INSPECTION
Yes Go to next step.
No Intermittent concern exists. Go to INTERMITTENT
CONCERN TROUBLESHOOTING procedure.
(See F–227 INTERMITTENT CONCERN
TROUBLESHOOTING.)
Yes Repair or replace terminals, then go to Step 7.
No Go to next step.
Yes Go to next step.
No Malfunction at generator.
Go to Step 6.
Yes Repair or replace pins, then go to Step 7.
No Go to next step.
Yes Repair or replace harness for short to power, then go to
Step 7.
No Go to Step 7.
ACTION
F–179
F