DTC P2503 [AJ]

BME010202500W01

DTC P2503

Generator output voltage signal no electricity

DETECTION CONDITION

• The PCM needs 20 A or more from the generator, and determines the generator output voltage to be 8.5 V or below when the engine is running.
Diagnostic support note
• This is a continuous monitor (other).
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• PENDING CODE is available if the PCM detects the above malfunction condition.
• FREEZE FRAME DATA is not available.
• DTC is stored in PCM memory.

POSSIBLE CAUSE

• Generator malfunction
- Rectifier circuit malfunction
- Brush abrasion
• Connector or terminal malfunction
• Open or short to GND circuit between generator terminal D and PCM terminal 36
• Open or short to GND circuit between generator terminal P and PCM terminal 63
• Cut drive belt off or came drive belt off
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to next step.
No
Record FREEZE FRAME DATA on repair order, then go to next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Check for related Service Information and/or on-line repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to available repair information.
• If vehicle is not repaired, go to next step.
No
Go to next step.
3
INSPECT DRIVE BELT CONDITION
• Verify that drive belt auto tensioner indicator mark in not exceeding limit.
• Is front drive belt normal?
Yes
Go to next step.
No
Replace or adjust drive belt, then go to Step 9.
4
INSPECT GENERATOR CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect generator connector.
• Check for poor connection (damaged, pulled-out pins, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace terminal, then go to Step 9.
No
Go to next step.
5
INSPECT GENERATOR CIRCUIT FOR SHORT TO GND
• Turn the ignition switch off.
• Check continuity between the following circuits:
- Generator terminal D (harness-side) and body GND
- Generator terminal P (harness-side) and body GND
• Is there continuity?
Yes
Repair or replace harness for short to GND, then go to Step 9.
No
Go to next step.
6
INSPECT GENERATOR
• Inspect generator.
• Is there any malfunction?
Yes
Replace generator, then go to Step 9.
No
Go to next step.
7
INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect PCM connector.
• Check for poor connection (such as damaged, pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace terminal, then go to Step 9.
No
Go to next step.
8
INSPECT GENERATOR CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch off.
• Check continuity between the following circuits:
- Generator terminal D (harness-side) and PCM terminal 36 (harness-side)
- Generator terminal P (harness-side) and PCM terminal 63 (harness-side)
• Is there continuity?
Yes
Go to next step.
No
Repair or replace harness for open circuit, then go to next step.
9
VERIFY TROUBLESHOOTING OF DTC P2503 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from memory using WDS or equivalent.
• Turn the ignition switch to OFF, then start engine.
• Is same DTC present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
10
VERIFY AFTER REPAIR PROCEDURE
• Perform "AFTER REPAIR PROCEDURE".
• Are any DTCs present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.