Lexus NX: Battery Control System (P3000-388)

HINT:

• If the vehicle is left with the shift lever in N (parked or stopped) for a long time, the battery cannot be charged. In this case, the SOC may drop below the lower limit and DTC P3000-388 may be stored. (This is not a system malfunction.)
• When the engine cannot be started, DTC P3000-388 may be stored because the HV battery cannot be charged.
• Repeated engine start checks may cause the SOC to drop, resulting in DTC P3000-388 being stored. In this case, charge the HV battery using the THS charger.
• Cranking the engine once causes the SOC to drop approximately 1%.
• Charging the HV battery once (10 minutes) using the THS charger restores the SOC approximately 2%.
• Charging the HV battery using the THS charger takes approximately 10 minutes when the battery temperature is 25°C (77°F) or approximately 30 minutes when the battery temperature is 0°C (32°F).
• The THS charger is a supplemental charging device that enables the hybrid system to start (READY-on state).
• After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
  1. Turn the power switch on (READY) with the shift lever in P and decrease the SOC. While the battery is being discharged, check that the engine starts to charge the battery, and "State of Charge (All Bat)" increases and remains in the appropriate range.

HINT:

• Depressing the accelerator pedal with the shift lever in P will cause the engine to start.
• Turning the power switch on (READY) and off repeatedly while the SOC is low may cause the SOC to drop further, resulting in DTC P3000-389 being stored. Charge the HV battery using the THS charger as necessary.
• Cranking the engine once causes the SOC to drop approximately 1%.
• Charging the HV battery once (10 minutes) using the THS charger restores the SOC approximately 2%.