DTC B2799-86: Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid [10/2020 - 11/2021]: Procedure

1. Register the communication ID codes.

   Refer to REGISTRATION [10/2020 - 10/2022]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Using an oscilloscope, check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *A	w/o Advanced Park	*B	w/ Advanced Park
   *a	Component with harness connected (Hybrid Vehicle Control ECU Assembly)	*b	Waveform
   *c	Approximately 160 ms.	*d	Approximately 270 ms.

   Measurement Condition

   Tester Connection	Condition	Tool Setting	Specified Condition
   G92-12 (IMO) - Body ground*1 G166-39 (IMO) - Body ground*2	Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery	2 V/DIV., 500 ms./DIV.	Pulse generation (See waveform)

   1. *1: w/o Advanced Park
   2. *2: w/ Advanced Park

   Result

   Result	Proceed to
   Normal waveform	A
   Terminal IMO stuck low (2.4 V or less)	B
   Waveform length or shape is abnormal, or IMO terminal stuck at Hi (12 V)	C

Result: 

B 

See step  6

Result: 

C 

See step  8

Result: 

A 

See step  3

1. Using an oscilloscope, check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *A	w/o Advanced Park	*B	w/ Advanced Park
   *a	Component with harness connected (Hybrid Vehicle Control ECU Assembly)	*b	Waveform
   *c	Approximately 160 ms.	*d	Approximately 270 ms.

   Measurement Condition

   Tester Connection	Condition	Tool Setting	Specified Condition
   G92-11 (IMI) - Body ground*1 G166-25 (IMI) - Body ground*2	Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery	2 V/DIV., 500 ms./DIV.	Pulse generation (See waveform)

   1. *1: w/o Advanced Park
   2. *2: w/ Advanced Park

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE ID CODE BOX (IMMOBILISER CODE ECU). Refer to  REMOVAL [10/2020 - 11/2021] 

Result: 

OK 

See step  4

1. Register the ECU communication ID codes.

   Refer to REGISTRATION [10/2020 - 10/2022]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Check that the hybrid control system starts.

   Result

   Result	Proceed to
   Hybrid control system was started	A
   Hybrid control system was not started	B

Result: 

A 

END (ECU COMMUNICATION ID HAS NOT BEEN REGISTERED) 

Result: 

B 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [10/2020 - 11/2021] 

1. *1: w/o Advanced Park
2. *2: w/ Advanced Park

1. Disconnect the hybrid vehicle control ECU assembly G92*1 or G166*2 connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   G92-12 (IMO) - Body ground*1 G166-39 (IMO) - Body ground*2	Power switch turned on (IG) using registered electrical key transmitter sub-assembly	Terminal IMO stuck low (2.4 V or less)
   		Terminal IMO stuck high (12 V) or abnormal waveform

   Result

   Result	Proceed to
   Terminal IMO stuck low (2.4 V or less)	A
   Terminal IMO stuck high (12 V) or abnormal waveform	B

Result: 

B 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [10/2020 - 11/2021] 

Result: 

A 

See step  7

1. Disconnect the G58 ID code box (immobiliser code ECU) connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   W/O ADVANCED PARK:
   
   

   Tester Connection	Condition	Specified Condition
   G58-3 (EFII) - G92-12 (IMO)	Always	Below 1 Ω
   G58-3 (EFII) or G92-12 (IMO) - Other terminals and body ground	Always	10 kΩ or higher
   G58-4 (EFIO) - G92-11 (IMI)	Always	Below 1 Ω
   G58-4 (EFIO) or G92-11 (IMI) - Other terminals and body ground	Always	10 kΩ or higher

   W/ ADVANCED PARK:
   
   

   Tester Connection	Condition	Specified Condition
   G58-3 (EFII) - G166-39 (IMO)	Always	Below 1 Ω
   G58-3 (EFII) or G166-39 (IMO) - Other terminals and body ground	Always	10 kΩ or higher
   G58-4 (EFIO) - G166-25 (IMI)	Always	Below 1 Ω
   G58-4 (EFIO) or G166-25 (IMI) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ID CODE BOX (IMMOBILISER CODE ECU). Refer to  REMOVAL [10/2020 - 11/2021] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. *1: w/o Advanced Park
2. *2: w/ Advanced Park

1. Disconnect the G58 ID code box (immobiliser code ECU) connector.
2. Disconnect the G92*1 or G166*2 hybrid vehicle control ECU assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   W/O ADVANCED PARK:
   
   

   Tester Connection	Condition	Specified Condition
   G58-3 (EFII) - G92-12 (IMO)	Always	Below 1 Ω
   G58-3 (EFII) or G92-12 (IMO) - Other terminals and body ground	Always	10 kΩ or higher

   W/ ADVANCED PARK:
   
   

   Tester Connection	Condition	Specified Condition
   G58-3 (EFII) - G166-39 (IMO)	Always	Below 1 Ω
   G58-3 (EFII) or G166-39 (IMO) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  REMOVAL [10/2020 - 11/2021] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR