P3000-388

L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P3000-388: HV Battery Malfunction

DTC P3000-388 - HV Battery Malfunction

DESCRIPTION

The hybrid vehicle control ECU alerts the driver and performs fail-safe control based on error signals received from the battery smart unit. This DTC is set when the SOC (state of charge) of the HV battery starts to drop as a result of leaving the shift lever in the N position, running out of fuel, or a malfunction in the HV control system.






INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT:
- If the vehicle is stopped or parked with the shift lever in the N position for a long time, DTC P3000-388 may be set because the HV battery cannot be charged.
Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
- If the vehicle is stopped or parked with the shift lever in the N position for a long time, DTC P3000-388 may be set because the HV battery cannot be charged.
- When the engine cannot be started, DTC P3000-388 may be set because the HV battery cannot be charged.

PROCEDURE

1. CHECK DTC OUTPUT (HV)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:
DTCs other than P3000-388 or P3000-389 are output.
YES -- GO TO DTC CHART
NO -- Continue to next step.
2. CHECK DTC OUTPUT (ENGINE CONTROL SYSTEM)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Engine and ECT / Trouble Codes.
(d) Check if DTCs are output.
Result:
Engine control system DTCs are output.
YES -- GO TO DTC CHART
NO -- Continue to next step.
3. CHECK AMOUNT OF GASOLINE
(a) Turn the power switch on (IG).
(b) Check the amount of fuel by referring to the fuel gauge in the meter.
OK:
Proper amount of fuel is in the tank.
NG -- REFUEL VEHICLE
OK -- Continue to next step.
4. CHECK ENGINE START
(a) Turn the power switch on (READY).
(b) Check if the engine starts.
HINT: Depressing the accelerator pedal with the shift lever in the P position will cause the engine to start.

OK:
The engine starts.
HINT: Do not turn the power switch on (READY) and off repeatedly because this may cause DTC P3000-389 to be set.

NO -- REPLACE HV BATTERY ASSEMBLY
YES -- LEAVE VEHICLE IN P POSITION, AND CHARGE HV BATTERY IN IDLE STATUS UNTIL IDLING STOPS