DTC P0C30-00: Hybrid/EV Battery State of Charge High [11/2022 - ]: Procedure

1. Check for DTCs.

   Powertrain > HV Battery > Trouble Codes 

   Powertrain > Hybrid Control > Trouble Codes 

   Result

   Result	Proceed to
   "P0C30-00" only is output.	A
   DTCs except "P0C30-00" of hybrid battery system are output.	B
   DTCs except "P0C30-00" of hybrid control system are output.	C

2. Turn the ignition switch off.

Result: 

B 

GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2022 - ] 

Result: 

C 

GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2022 - 12/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [12/2024 - ]

Result: 

A 

See step  2

1. Read the freeze frame data of DTC P0C30-00.

   Powertrain > HV Battery > Trouble Codes 

   Result

   Result	Proceed to
   OFF is displayed for "Ready Signal", "SMRB Control Status" and "SMRG Control Status" and -0.5 A or less is displayed for "Hybrid/EV Battery Current".	A
   Other than above	B

   HINT: 

   As the ignition switch ON state may cause the DTC to be stored, freeze frame data is used to judge the cause of the DTC output.

2. Turn the ignition switch off.

Result: 

B 

REPLACE HYBRID VEHICLE CONTROL ECU 

Refer to REMOVAL [11/2022 - 12/2024] , or refer to REMOVAL [12/2024 - ]

Result: 

A 

See step  3

1. Check that the service plug grip is not installed.
   NOTE:

   After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the appropriate servce information because this may cause a malfunction.

2. Disconnect the high voltage cable connectors from the HV battery junction block assembly.
   NOTE:

   Insulate each disconnected high-voltage connector with insulating tape. Wrap the connector from the wire harness side to the end of the connector.

3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (HV Battery Junction Block Assembly)

   -

   -

   Standard Resistance (SMRB)

   Tester Connection	Condition	Specified Condition
   W7-1 (CBI) - z26-1 (+)	Ignition switch off	10 kΩ or higher

4. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (HV Battery Junction Block Assembly)

   -

   -

   Standard Resistance (SMRG, SMRP)

   Tester Connection	Condition	Specified Condition
   W6-1 (CEI) - z23-1 (-)	Ignition switch off	10 kΩ or higher

5. Reconnect the high voltage cable connectors to the HV battery junction block assembly.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY 

Refer to REMOVAL [11/2022 - ]

Result: 

OK 

See step  4

1. Turn the ignition switch to ON (READY).
2. Perform a road test.
   NOTE:

   Accelerate/decelerate gently. Avoid rapid acceleration/deceleration.

   1. Drive the vehicle with the value of Data List item "Hybrid/EV Battery Current" between -50 A to 50 A.

      Powertrain > HV Battery > Data List 

      Tester Display
      Hybrid/EV Battery Current

      HINT: 

      Distance and driving time are not specified.

3. Turn the ignition switch off and leave the vehicle for 30 seconds or more.
4. Turn the ignition switch to ON.
5. Check that the value of "Hybrid/EV Battery Current" is between - 0.5 A and 0.5 A with the ignition switch ON.

   Powertrain > HV Battery > Data List 

   Tester Display
   Hybrid/EV Battery Current

   NOTE:

   • If the value is outside the specified range, perform the road test again.
   • This DTC may be output if Current Sensor Offset Learning has not been completed.

   HINT: 

   • If the ignition switch is ON and value of "Hybrid/EV Battery Current" is between - 0.5 A and 0.5 A, current sensor offset learning has been completed.
   • Even if the current sensor offset learning is not complete, the current sensor value will be corrected by repeating the road test a maximum of 7 times.
6. Turn the ignition switch off.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END