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DTC P1633 [AJ]

BME010201600209

DTC P1633 | Battery overcharge
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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
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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". (See AFTER REPAIR PROCEDURE [AJ].) • Is there any DTC present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
No | Troubleshooting completed.