DTC B2799: Immobilizer Malfunction [06/2015 - ]: Procedure

1. Register the ECU communication ID.

   Refer to REGISTRATION [06/2015 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Clear the DTCs.

   Powertrain > EV > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Perform "DTC Output Confirmation Operation" procedure.
2. Check for DTCs.

   Powertrain > EV > Trouble Codes 

   OK

   DTC B2799 is not output.

   Result

   Result	Proceed to
   DTC B2799 is not output	A
   DTC B2799 is output	B

Result: 

A 

END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE) 

Result: 

B 

See step  4

1. Using an oscilloscope, check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component with harness connected (EV Control ECU)

   *b

   Waveform

   MEASUREMENT CONDITION
   
   

   Item	Content
   Tester Connection	G46-23 (IMO) - Body ground
   Tool Setting	2 V/DIV., 500 ms./DIV.
   Condition	Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

   OK

   The waveform is similar to that shown in the illustration

   Result

   Result	Proceed to
   Normal waveform	A
   Terminal IMO stuck low (2.4 V or less)	B
   Terminal IMO stuck high (11 to 14 V) or Abnormal waveform	C

Result: 

B 

See step  8

Result: 

C 

REPLACE EV CONTROL ECU. Refer to  REMOVAL [06/2015 - 11/2018]  , or refer to  REMOVAL [11/2018 - ] 

Result: 

A 

See step  5

1. Using an oscilloscope, check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component with harness connected (EV Control ECU)

   *b

   Waveform

   MEASUREMENT CONDITION
   
   

   Item	Content
   Tester Connection	G46-22 (IMI) - Body ground
   Tool Setting	2 V/DIV., 500 ms./DIV.
   Condition	Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after auxiliary battery cable disconnected and reconnected

   OK

   The waveform is similar to that shown in the illustration

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE ID CODE BOX (IMMOBILIZER CODE ECU). Refer to  REMOVAL [06/2015 - 11/2018]  , or refer to  REMOVAL [11/2018 - ] 

Result: 

OK 

See step  6

1. Register the ECU communication ID.

   Refer to REGISTRATION [06/2015 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Check that the hybrid control system starts.

   OK

   Hybrid control system starts normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE) 

Result: 

NG 

REPLACE EV CONTROL ECU. Refer to  REMOVAL [06/2015 - 11/2018]  , or refer to  REMOVAL [11/2018 - ] 

1. Disconnect the EV control ECU assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to EV Control ECU)

   Standard Voltage

   Tester Connection	Condition	Result
   G46-23 (IMO) - Body ground	Power switch off	2.4 V or less (stuck low)
   		11 to 14 V (stuck high)

   Result

   Result	Proceed to
   Terminal IMO stuck low (2.4 V or less)	A
   Terminal IMO stuck high (11 to 14 V)	B

Result: 

B 

REPLACE EV CONTROL ECU. Refer to  REMOVAL [06/2015 - 11/2018]  , or refer to  REMOVAL [11/2018 - ] 

Result: 

A 

See step  9

1. Disconnect the G15 ID code box (immobilizer code ECU) connector.
2. Disconnect the G46 EV control ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G15-4 (EFIO) - G46-22 (IMI)	Always	Below 1 Ω
   G15-3 (EFII) - G46-23 (IMO)	Always	Below 1 Ω
   G15-4 (EFIO) or G46-22 (IMI) - Body ground	Always	10 kΩ or higher
   G15-3 (EFII) or G46-23 (IMO) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ID CODE BOX (IMMOBILIZER CODE ECU) 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR