Lexus ES: Hybrid/EV Battery Discharge Control Malfunction (P300000)
DESCRIPTION
The battery ECU assembly alerts the driver and performs fail-safe control based on malfunction signals. If the SOC drops due to running out of fuel, the vehicle being left with the shift lever in N for a long time or a hybrid control system malfunction, this DTC will be stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P300000 | Hybrid/EV Battery Discharge Control Malfunction | Discharging of the HV battery continues even after discharging is prohibited when the "SOC" has reached the lower limit. (1 trip detection logic) |
| Does not come on | Master Warning Light: Does not come on |
| DTC No. | Data List |
|---|---|
| P300000 |
|
CONFIRMATION DRIVING PATTERN
HINT:
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
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- Connect the Techstream to the DLC3.
- Turn the power switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for 2 minutes or more.
- Turn the power switch on (IG) and turn the Techstream on.
- Turn the power switch on (READY) with the shift lever in P and cause the "Hybrid/EV Battery SOC" to decrease. Check that the engine is started to charge the HV battery, and the value of Data List item "Hybrid/EV Battery SOC" increases and then remains within an appropriate range.
- Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
-
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.
CAUTION / NOTICE / HINT
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 P300000 may be stored. (This is not a system malfunction.)
- When the engine cannot be started, DTC P300000 may be stored because the HV battery cannot be charged.
- Repeated engine start checks may cause the SOC to drop, resulting in DTC P300000 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).
- If the result of this inspection is to charge the HV battery, clear the DTCs and then charge the HV battery using the THS charger.
PROCEDURE
| 1. | CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / HV Battery and Hybrid Control / Trouble Codes.
(d) Check for DTCs.
Powertrain > HV Battery > Trouble Codes Powertrain > Hybrid Control > Trouble Codes| Result | Proceed to |
|---|---|
| "P300000 or P300016" only is output. | A |
| DTCs except "P300000 or P300016" of hybrid battery system are output. | B |
| DTCs except "P300000 or P300016" of hybrid control system are output. | C |
(e) Turn the power switch off.
| B | .gif) | GO TO DTC CHART (HYBRID BATTERY SYSTEM) |
| C | | GO TO DTC CHART (HYBRID CONTROL SYSTEM) |
|
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| 2. | CHECK DTC OUTPUT (ENGINE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Engine / Trouble Codes.
(d) Check for DTCs.
Powertrain > Engine > Trouble Codes| Result | Proceed to |
|---|---|
| No DTCs are output. | A |
| DTCs are output. | B |
(e) Turn the power switch off.
| B | | GO TO DTC CHART (SFI SYSTEM) |
|
| 3. | CHECK AMOUNT OF FUEL |
(a) Turn the power switch on (IG).
(b) Check the amount of fuel by referring to the fuel gauge in the meter.
| Result | Proceed to |
|---|---|
| Proper amount of fuel is in the tank. | A |
| There is no fuel in the tank. | B |
HINT:
Add fuel until the low fuel level warning light turns off.
(c) Turn the power switch off.
| B | | REFUEL VEHICLE |
|
| 4. | CHECK FREEZE FRAME DATA (HV BATTERY) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Battery / Trouble Codes.
(d) Read the freeze frame data item "Shift Position" of DTC P300000.
Powertrain > HV Battery > Trouble Codes Powertrain > HV Battery| Tester Display |
|---|
| Shift Position |
NOTICE:
- When the freeze frame data "Shift Position" was N, DTC P300000 may be stored due to the vehicle was left with the shift lever in N and the HV battery could not be charged.
- If DTC "P300000" only is output, charge the HV battery without replacing the HV battery if necessary.
(e) Turn the power switch off.
|
| 5. | 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 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 P300016 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%.
| Result | Proceed to |
|---|---|
| The engine starts. | A |
| The engine does not start. | B |
(c) If the engine does not start, turn the power switch off.
| A | | LEAVE VEHICLE WITH THE SHIFT LEVER IN P, AND CHARGE HV BATTERY BY IDLING UNTIL IDLING STOPS |
|
| 6. | CLEAR DTC (HV BATTERY) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / HV Battery / Clear DTCs.
(d) Clear the DTCs and freeze frame data.
Powertrain > HV Battery > Clear DTCs(e) Perform a road test.
| NEXT | | CHARGE HV BATTERY |
READ NEXT:
Hybrid/EV Battery Control System Over Temperature (P30004B)
DESCRIPTION The battery ECU assembly monitors the temperature of the HV battery to detect if it becomes excessively high. DTC No. Detection Item DTC Detection Condition Trouble Area MIL W
Hybrid/EV Battery Control System Circuit Voltage Below Threshold (P300016)
DESCRIPTION The battery ECU assembly alerts the driver and performs fail-safe control based on malfunction signals. If the HV battery is discharged excessively or the hybrid battery system is malfunct
Hybrid/EV Battery Voltage High (P31B300)
DESCRIPTION If the voltage of any HV battery cell exceeds the threshold, charging will be prohibited. If charging cannot be prohibited due to an hybrid battery system malfunction, this DTC will be sto
SEE MORE:
Basic Inspection
DESCRIPTION When replacing the No. 1 HV supply stack sub-assembly or No. 2 HV supply stack sub-assembly, it is necessary to check, adjust and equalize the SOC of the HV battery. Otherwise, the engine may run longer than normal, resulting in a decrease in fuel efficiency. PROCEDURE 1. READ VALU
Terminals Of Ecu
TERMINALS OF ECU NOTICE:
DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the inspection has been completed.
Do not apply excessive force to the forward recognition camera connector.
CHECK FORWARD RECOGNITI
