DTC P0C30-00: Hybrid/EV Battery State of Charge High [12/2023 - ]: Procedure

Pre-procedure1

• None.

• Check for DTCs.

  Powertrain > EV Battery > Trouble Codes 

  Result

  Result	Proceed to
  Only P0C30-00 is output	A
  P0C30-00 and other DTCs are output	B

Post-procedure1

• Turn the ignition switch off.

Result: 

B 

GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

Result: 

A 

See step  2

Pre-procedure1

• None.

• Check for DTCs.

  Powertrain > EV > Trouble Codes 

  Result

  Result	Proceed to
  DTCs are not output	A
  DTCs are output	B

Post-procedure1

• Turn the ignition switch off.

Result: 

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

Result: 

A 

See step  3

Pre-procedure1

• None.

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

  Powertrain > EV Battery > DTC(P0C30-00) > Freeze Frame Data 

  Tester Display
  Ready Signal
  SMRG Control Status
  SMRB Control Status
  SMRP Control Status
  Hybrid/EV Battery Current

  Result

  Result	Proceed to
  OFF is displayed for "Ready Signal", "SMRP Control Status", "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.

Post-procedure1

• Turn the ignition switch off.

Result: 

B 

REPLACE EV CONTROL ECU. Refer to  REMOVAL [12/2023 - ] 

Result: 

A 

See step  4

Pre-procedure1

• Check that the service plug grip and FC converter power outlet cable are not installed.
  NOTE:

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

• Remove the upper EV battery cover panel.

  HINT: 

  Refer to REMOVAL [12/2023 - ]

• Disconnect the high voltage cable connectors from the No. 1 EV 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.

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

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a

  Component without harness connected (No. 1 EV Battery Junction Block Assembly)

  -

  -

  Standard Resistance (SMRB)

  Tester Connection	Condition	Specified Condition	Result
  N1-1 (CBI) - z13-1 (+)	Always	10 kΩ or higher	kΩ

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

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a

  Component without harness connected (No. 1 EV Battery Junction Block Assembly)

  -

  -

  Standard Resistance (SMRG, SMRP)

  Tester Connection	Condition	Specified Condition	Result
  N2-1 (CEI) - z12-1 (-)	Always	10 kΩ or higher	kΩ

  HINT: 

  If the resistance is between 24.3 and 29.7 Ω, it can be determined that SMRP is stuck closed.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• Reconnect the high voltage cable connectors to the No. 1 EV battery junction block assembly.
• Install the upper EV battery cover panel.

Result: 

NG 

REPLACE NO. 1 EV BATTERY JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

Result: 

OK 

See step  5

Pre-procedure1

• None.

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

  Accelerate/decelerate gently. Avoid rapid acceleration/deceleration.

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

  Powertrain > EV Battery > Data List 

  Tester Display
  Hybrid/EV Battery Current

  HINT: 

  Distance and driving time are not specified.

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

  Powertrain > EV 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.

  Result

  Proceed to
  NEXT

Post-procedure1

• Turn the ignition switch off.

Result: 

NEXT 

END