Lexus ES manuals

Lexus ES: Hybrid/EV Battery State of Charge High (P0C3000)

Lexus ES (XZ10) Service Manual / Engine & Hybrid System / Hybrid / Battery Control / Hybrid Control System (for Nickel Metal Hydride Battery) / Hybrid/EV Battery State of Charge High (P0C3000)

DESCRIPTION

The hybrid vehicle control ECU monitors the system internal operation and will store a DTC and perform fail-safe control if it detects the following malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0C3000

Hybrid/EV Battery State of Charge High

Charging prohibited

Charging of the HV battery continues even after charging is prohibited when the hybrid system is malfunctioning and "Hybrid Battery SOC" has reached the upper limit.

(1 trip detection logic)
  • Hybrid vehicle control ECU
  • HV battery junction block assembly
  • Battery voltage sensor
  • Hybrid battery thermistor (wire harness or connector)
  • Wire harness or connector

Does not come on

Master Warning Light:

Comes on
Related Data List

DTC No.

Data List

P0C3000
  • Hybrid Battery SOC
  • WIN Control Limit Power
  • Hybrid Battery Current

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.

Click here

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG) and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the power switch off and wait for 2 minutes or more.
  5. Turn the power switch on (IG) and turn the Techstream on.
  6. Apply the parking brake and secure the wheels using chocks.
  7. Fully apply the parking brake and chock all 4 wheels. Firmly depress the brake pedal, turn the power switch on (READY) and with the shift lever in D. Depress the accelerator pedal to start the engine and increase the engine speed. This will cause the Hybrid Battery SOC to increase.

    If the charge current drops, release the accelerator pedal and then depress it again to maintain charging.

  8. Select "WIN Control Limit Power" in the Data List and check that charging stops when "WIN Control Limit Power" reaches 0 kW.
  9. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.
  10. 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.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0ABF11.

Click here

CAUTION / NOTICE / HINT

CAUTION:

  • Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
    • Inspecting the high-voltage system
    • Disconnecting the low voltage connector of the inverter with converter assembly
    • Disconnecting the low voltage connector of the HV battery
  • To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
  • After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
  • After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

    Click here

    HINT:

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

    *a

    Without waiting for 10 minutes

NOTICE:

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

Click here

PROCEDURE

1.

CHECK DTC OUTPUT (HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.

(d) Check for DTCs.

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

P0C3000 only is output.

A

DTCs except P0C3000 are output.

B

(e) Turn the power switch off.

B

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

A

2.

CHECK BATTERY VOLTAGE SENSOR (IGCT VOLTAGE)

Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY VOLTAGE SENSOR POWER SOURCE CIRCUIT)
OK

3.

CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE SENSOR - HV BATTERY JUNCTION BLOCK ASSEMBLY)

Click here

NG

REPLACE HYBRID BATTERY THERMISTOR

OK

4.

CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE)

Click here

NG

GO TO STEP 7

OK

5.

CHECK BATTERY VOLTAGE SENSOR (GIB - GND)

Click here

NG

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

OK

6.

CHECK HYBRID VEHICLE CONTROL ECU (HYBRID BATTERY CURRENT)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

NOTICE:

During the inspection, make sure to only turn the power switch on (IG). Do not turn the power switch on (READY).

(c) Enter the following menus: Powertrain / Hybrid Control / Data List / Hybrid Battery Current, Hybrid Battery Current for Hybrid Battery Control.

Powertrain > Hybrid Control > Data List

Tester Display

Hybrid Battery Current

Hybrid Battery Current for Hybrid Battery Control

(d) With the power switch on (IG), monitor Data List item "Hybrid Battery Current" and "Hybrid Battery Current for Hybrid Battery Control" for 1 minute.

Result

Proceed to

The value of Data List item "Hybrid Battery Current" and "Hybrid Battery Current for Hybrid Battery Control" is -0.5 A or less or 0.5 A or more.

A

Other than above

B

(e) Turn the power switch off.

A

REPLACE BATTERY VOLTAGE SENSOR

B

REPLACE HYBRID VEHICLE CONTROL ECU

7.

CHECK BATTERY VOLTAGE SENSOR (VIB VOLTAGE)

Click here

OK

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

NG

REPLACE BATTERY VOLTAGE SENSOR

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