DTC P0ABF-28: Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure [10/2022 - ]: 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 [10/2022 - 10/2024]  , or Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ] 

Result: 

A 

See step  2

HINT: 

See step  3

Result

Result: 

NG 

REPLACE HV BATTERY (WIRE HARNESS OR CONNECTOR). Refer to  REMOVAL [10/2022 - ] 

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 appropriate service information because this may cause a malfunction.

• Connect the cable to the negative (-) auxiliary battery terminal.

• 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	Tester Connection
  z35-10 (VIB) - z35-22 (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	Tester Connection
  z35-9 (IB0) - z35-22 (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.

  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 ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

A 

See step  4

HINT: 

Refer to REMOVAL [10/2022 - ]

Result

Result: 

NEXT 

See step  5

Refer to PROCEDURE - Step 4

Result

Result: 

NEXT 

See step  6

Pre-procedure1

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

• 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 

COMPLETED 

Result: 

B 

REPLACE NO. 1 TRACTION BATTERY DEVICE BOX ASSEMBLY. Refer to  REMOVAL [10/2022 - ]