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DTC P2503 [AJ]

BME010202500W01

DTC P2503 | Generator output voltage signal no electricity
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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
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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. (See DRIVE BELT INSPECTION [AJ].) • 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. (See GENERATOR INSPECTION [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).) • Is there any malfunction? | Yes | Replace generator, then go to Step 9. (See GENERATOR REMOVAL/INSTALLATION [AJ].)
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. (See PCM REMOVAL/INSTALLATION [AJ].)
No | Go to next step.
10 | VERIFY AFTER REPAIR PROCEDURE • Perform "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [AJ].) • Are any DTCs present? | Yes | Go to applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
No | Troubleshooting completed.