DTC P0ABF-28: Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure [09/2023 - ]: Procedure

Pre-procedure1

• None.

• Check for DTCs.

  Powertrain > Hybrid Control > Trouble Codes 

  Result

  Result	Proceed to
  P0AFC-00, P0AFC-96 or P0A95-63 is not output	A
  P0AFC-00, P0AFC-96 or P0A95-63 is output	B

Post-procedure1

• Turn the ignition switch off.

Result: 

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2023 - ] 

Result: 

A 

See step  2

See step  3

Result

Result: 

NG 

REPLACE HV BATTERY (WIRE HARNESS OR CONNECTOR). Refer to  REMOVAL [09/2023 - ] 

Result: 

OK 

See step  3

Pre-procedure1

• 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 service information because this may cause a malfunction.

• Connect the battery current sensor connector.
• Connect the cable to the negative (-) auxiliary battery terminal.
• Turn the ignition switch to ON.

• Using a Toyota electrical tester set to 40 V, measure the VIB voltage according to the value(s) in the table below.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Component with harness connected (Battery Voltage Sensor)

  Tester Connection	Switch Condition
  z12-10 (VIB) - z12-22 (GIB)	Ignition switch ON

  NOTE:

  • Turning the ignition switch to ON with the service plug grip removed causes other DTCs to be stored. Clear the DTCs after performing this inspection.
  • Be sure to set the Toyota electrical tester to 40 V when performing this test.
• Using a Toyota electrical tester set to 4 V, measure the IB0 voltage according to the value(s) in the table below.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	Component with harness connected (Battery Voltage Sensor)

  Tester Connection	Switch Condition
  z12-9 (IB0) - z12-22 (GIB)	Ignition switch ON

  NOTE:

  Be sure to set the Toyota electrical tester to 4 V when performing this test.

• Compare the measured values of the IB0 terminal voltage and VIB terminal voltage using the following formula:

  IB0 voltage - VIB Voltage / 2 = less than 0.081 V

  IB0 voltage - VIB Voltage / 2 = -0.081 V or higher

  Result

  Result	Proceed to
  Within the specified range above	A
  Other than above	B

Post-procedure1

• Turn the ignition switch off.
• Disconnect the cable from the negative (-) auxiliary battery terminal.
• Disconnect the battery current sensor connector.

  HINT: 

  When the ignition switch is ON, the actual current will be approximately 0 A. The following graph shows the relation between the actual output voltage of the battery current sensor terminal IB0 and the actual current used for DTC judgment.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Result: 

B 

REPLACE NO. 1 TRACTION BATTERY DEVICE BOX. Refer to  REMOVAL [09/2023 - ] 

Result: 

A 

See step  4

HINT: 

Refer to REMOVAL [09/2023 - ]

Result

Result: 

NEXT 

See step  5

Pre-procedure1

• Clear the DTCs and Freeze Frame Data.

  Powertrain > Hybrid Control > Clear DTCs 

• Drive the vehicle on urban roads for approximately 10 minutes.

  Result

  Proceed to
  NEXT

Post-procedure1

• Turn the ignition switch off and wait for 2 minutes or more.
• Turn the ignition switch to ON and wait for 10 seconds or more.

Result: 

NEXT 

See step  6

Pre-procedure1

• None.

• Read output DTCs.

  Powertrain > Hybrid Control > Trouble Codes 

  Result

  Result	Proceed to
  P0ABF-28 is not output	A
  P0ABF-28 is output	B

Post-procedure1

• Turn the ignition switch off.

Result: 

A 

END 

Result: 

B 

REPLACE NO. 1 TRACTION BATTERY DEVICE BOX. Refer to  REMOVAL [09/2023 - ]