DTC P1633 [AJ]

BME010201600209

DTC P1633

Battery overcharge

DETECTION CONDITION

• The PCM monitors the input voltage from the generator and battery positive terminal. If the PCM detected that the generator output voltage above 18.5 V or battery voltage above 16.0 V for 5 s while engine running, the PCM determines that the charging system has malfunction.

POSSIBLE CAUSE

• Short to power circuit between the generator connector terminal D and the PCM connector terminal 53
• Generator malfunction
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to the next step.
No
Go to the next step.
2
INSPECT GENERATOR CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect generator connector.
• Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace the terminals, then go to Step 7.
No
Go to the next step.
3
CLASSIFY GENERATOR MALFUNCTION OR OTHER MALFUNCTION
• Turn the ignition switch to the ON position (Engine off).
• Measure the voltage between generator terminal D (wiring harness-side) and body ground.
• Is the voltage B+?
Yes
Go to the next step.
No
Malfunction at the generator.
Go to step 6.
4
INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
Yes
Repair or replace pins, then go to Step 7.
No
Go to the next step.
5
INSPECT GENERATOR CONTROL CIRCUIT FOR SHORT TO POWER
• Turn the ignition switch to the ON position (Engine off).
• Measure the voltage between generator terminal D (wiring harness-side) and body ground.
• Is the voltage B+?
Yes
Repair or replace the wiring harness for short to power supply, then go to Step 7.
No
Go to step 7.
6
INSPECT GENERATOR CONTROL TERMINAL FOR SHORT TO POWER
• Measure the resistance between generator terminal D (part-side) and body ground.
• Is the voltage B+?
Yes
Repair or replace the generator, then go to the next step.
No
Go to the next step.
7
VERIFY TROUBLESHOOTING OF DTC P1633 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Turn the ignition switch off, then the ON position (Engine off).
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.