DTC P2504:00 [MZR 1.6]

id0102h3709700

DTC P2504:00

Charging system voltage high input
DETECTION CONDITION
•  The PCM determines that the generator output voltage is 18.5 V or more or battery voltage is 16.0 V or more while the engine running.
Diagnostic support note
•  This is continuous monitor (other).
•  The check engine light does not illuminate.
•  FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.
•  DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  Generator connector or terminals malfunction
•  Battery malfunction
•  PCM connector or terminals malfunction
•  Short to power supply in wiring harness between generator terminal 2B and PCM terminal 2AS
•  Generator malfunction
•  PCM malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
2
INSPECT GENERATOR CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the generator connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 7.
No
Go to the next step.
3
INSPECT BATTERY
•  Inspect the battery.
•  Is there any malfunction?
Yes
Replace the battery, then go to Step 7.
(See BATTERY REMOVAL/INSTALLATION [MZR 1.6].)
No
Go to the next step.
4
INSPECT PCM CONNECTOR CONDITION
•  Disconnect the PCM connector.
•  Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 7.
No
Go to the next step.
5
INSPECT GENERATOR CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY
•  Verify that the generator and PCM connectors are disconnected.
•  Switch the ignition ON (engine off).
Note
•  Another DTC may be stored by the PCM detecting an open circuit.
•  Measure the voltage at the generator terminal 2B (wiring harness-side).
•  Is the voltage 0 V?
Yes
Go to the next step.
No
Refer to the wiring diagram and verify whether or not there is a common connector between generator terminal 2B and PCM terminal 2AS.
If there is a common connector:
•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.
•  Repair or replace the malfunctioning part.
If there is no common connector:
•  Repair or replace the wiring harness which has a short to power supply.
Go to Step 7.
6
INSPECT GENERATOR
•  Switch the ignition off.
•  Inspect the generator.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to the next step.
(See GENERATOR REMOVAL/INSTALLATION [MZR 1.6].)
(See GENERATOR DISASSEMBLY/ASSEMBLY [MZR 1.6].)
No
Go to the next step.
7
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the KOER self test.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR 1.6].)
No
DTC troubleshooting completed.