Dtc P2503[L3 With Tc] - Mazda CX-7 2007 Workshop Manual

STEP
3 INSPECT BATTERY
• Turn the ignition switch off.
• Inspect the battery.
• Is the battery normal?
4 INSPECT GENERATOR
• Inspect the generator.
(See 01-17-6 GENERATOR INSPECTION[L3
WITH TC])
• Is the generator normal?
5 INSPECT POOR INSTALLATION OF
GENERATOR TERMINAL
• Turn the ignition switch to off.
• Inspect for looseness of generator terminal B
installation nut.
• Is the nut loose?
6 INSPECT POOR INSTALLATION OF BATTERY
POSITIVE TERMINAL
• Inspect for looseness of battery positive
terminal.
• Is the terminal loose?
7 INSPECT BATTERY CHARGING CIRCUIT
• Disconnect the generator terminal B.
• Measure the voltage between generator
terminal B (wiring harness-side) and body
ground.
• Is the voltage B+?
8 VERIFY TROUBLESHOOTING OF DTC P2502
COMPLETED
• Make sure to reconnect all connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Start the engine.
• Is the same DTC present?
9 VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
(See01-14-4 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
End Of Sie

DTC P2503[L3 WITH TC]

DTC P2503 Charging system voltage low
• PCM needs more than 20 A from the generator, and determines that generator output voltage is below 8.5
V while the engine is running.
Diagnostic support note
DETECTION
• This is a continuous monitor (Other).
CONDITION
• The MIL does not illuminate.
• FREEZE FRAME DATA is not available.
• DTCs are stored in the PCM memory.
• Generator malfunction
• PCM and/or generator are poorly connected
• Open and/or short to ground in the wiring harness from between generator terminal P and PCM terminal
POSSIBLE
2AJ
CAUSE
• Open and/or short to ground in the wiring harness from between generator terminal D and PCM terminal
2AI
• Drive chain misadjustment
01-02–252
ON-BOARD DIAGNOSTIC [L3 WITH TC]
INSPECTION
Yes Go to the next step.
No Replace the battery, then go to Step 8.
Yes Go to the next step.
No Replace the generator, then go to Step 8.
(See 01-17-4 GENERATOR REMOVAL/INSTALLATION[L3
WITH TC])
Yes Tighten the generator terminal B installation nut, then go to
Step 8.
No Go to the next step.
Yes Connect the battery positive terminal correctly, then go to
Step 8.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness between generator
terminal B and battery positive terminal, then go to the next
step.
Yes Replace the PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)
No Go to the next step.
Yes Go to the applicable DTC inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No Troubleshooting completed.
ACTION
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