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DTC P1634 [AJ]

BME010201600210

DTC P1634 | Generator terminal B circuit open
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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 17.0 V and battery voltage below 11.0 V for 5 s while engine running, the PCM determines that the charging system has malfunction.
POSSIBLE CAUSE | • Open circuit between the generator terminal B and the battery positive terminal • Battery 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 BATTERY • Turn the ignition switch off. • Inspect battery. (See BATTERY INSPECTION.) • Is battery normal? | Yes | Replace battery, then go to Step 6.
No | Go to the next step.
3 | INSPECT GENERATOR TERMINAL FOR POOR INSTALLATION • Turn the ignition switch off. • Inspect for looseness of generator terminal B installation nut. • Is nut loose? | Yes | Tighten generator terminal B installation nut, then go to Step 6.
No | Go to the next step.
4 | INSPECT BATTERY POSITIVE TERMINAL FOR POOR INSTALLATION • Inspect for looseness of battery positive terminal. • Is terminal loose? | Yes | Connect battery positive terminal correctly, then go to Step 6.
No | Go to the next step.
5 | INSPECT BATTERY CHARGING CIRCUIT • Start the engine. • Disconnect battery positive terminal. • Is the engine stalled? | Yes | Repair or replace harness between generator terminal B and battery positive terminal, then go to the next step.
No | Go to the next step.
6 | VERIFY TROUBLESHOOTING OF DTC P1634 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the WDS or equivalent. • Turn the ignition switch off, then start engine. • Is the same DTC present? | Yes | Replace the PCM, then go to the next step.
No | Go to the next step.
7 | 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.