DTC B2799: Engine Immobiliser System Malfunction [08/2013 - ]: Procedure

1. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .

NEXT: Go to next step 

1. Start the hybrid control system.
2. Wait 10 seconds or more.
3. Check for DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .

   HINT: 

   Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

   OK

   DTC B2799 is not output.

   RESULT
   
   

   Result	Proceed to
   OK	A
   NG (DTC B2799 is output)	B
   NG (Other DTCs are output)	C

B → See step   3 

C → See step   15 

A → See step   16 

1. Using an oscilloscope, check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a

   Component with harness connected (Power Management Control ECU)

   *b

   Waveform

   MEASUREMENT CONDITION
   
   

   Item	Content
   Tester Connection	H2-20 (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 (12 V) or Abnormal waveform	C

B → See step   7 

C → See step   12 

A: Go to next step 

1. Using an oscilloscope, check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a

   Component with harness connected (Power Management Control ECU)

   *b

   Waveform

   MEASUREMENT CONDITION
   
   

   Item	Content
   Tester Connection	H2-21 (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
   
   

   Result	Proceed to
   Normal waveform	A
   Waveform not output or abnormal waveform	B

B → See step   9 

A: Go to next step 

1. Reregister the ECU communication ID. Refer to REGISTRATION [08/2013 - ] .

NEXT: Go to next step 

1. Check that the hybrid control system starts with an already registered vehicle key.

   OK

   Hybrid control system starts normally.

NG → See step   12 

OK → END (COMMUNICATION ID REGISTRATION WAS DEFECTIVE) 

1. Disconnect the H2 power management control ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn the power switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Result

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

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Power Management Control ECU)

B → See step   12 

A: Go to next step 

1. Disconnect the H15 ID code box (immobiliser code ECU) connector.
2. Disconnect the H2 power management control ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H15-3 (EFII) - H2-20 (IMO)	Always	Below 1 Ω
   H2-20 (IMO) - Body ground	Always	10 kΩ or higher
   H15-4 (EFIO) - H2-21 (IMI)	Always	Below 1 Ω
   H2-21 (IMI) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the ID code box (immobiliser code ECU). Refer to REMOVAL [08/2013 - ] .

NEXT: Go to next step 

1. Reregister the ECU communication ID. Refer to REGISTRATION [08/2013 - ] .

NEXT: Go to next step 

1. Check that the hybrid control system starts with an already registered vehicle key.

   OK

   Hybrid control system starts normally.

NG → See step   17 

OK → END (ID CODE BOX (IMMOBILISER CODE ECU) WAS DEFECTIVE) 

1. Temporarily replace the power management control ECU with a new one. Refer to REMOVAL [08/2013 - ] .

NEXT: Go to next step 

1. Reregister the ECU communication ID. Refer to REGISTRATION [08/2013 - ] .

NEXT: Go to next step 

1. Check that the hybrid control system starts with an already registered vehicle key.

   OK

   Hybrid control system starts normally.

NG → See step   18 

OK → END (POWER MANAGEMENT CONTROL ECU WAS DEFECTIVE)