IMMOBILISER SYSTEM(w/ Entry and Start System) TERMINALS OF ECU

CHECK ENGINE SWITCH

1. Measure the voltage and resistance according to the value(s) in the table below.

   Terminal No. (Symbol)	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
   E51-6 (AGND) - Body ground	-	B - Body ground	Transponder key amplifier ground	Always	Below 1 Ω	-
   E51-7 (TXCT) - E51-6 (AGND)	Input	BE - B	Immobiliser communication input	Engine switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed	Below 1 V	-
   E51-8 (CODE) - E51-6 (AGND)	Output	SB - B	Immobiliser communication output	Engine switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed	Below 1 V	-
   E51-10 (VC5) - E51-6 (AGND)	Input	W - B	Transponder key amplifier power supply	Engine switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed	Below 1 V	-

2. Check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
   E51-7 (TXCT) - E51-6 (AGND)	Input	BE - B	Signal input from certification ECU (smart key ECU assembly) (Code sent from certification ECU (smart key ECU assembly) to transponder key amplifier built into engine switch, and then transmitted by transponder key amplifier antenna as radio waves)	Engine switch off, key not in cabin, within 30 seconds after engine switch pressed	Pulse generation (See waveform 1)	BCC Malfunction Abnormal Status Different Encrypt Code Different Serial Number Frame Error Response Tip: If immobiliser key code verification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above
   E51-8 (CODE) - E51-6 (AGND)	Output	SB - B	Signal output to certification ECU (smart key ECU assembly) (Radio waves from transponder key amplifier built into engine switch used to detect key information. Key information then sent to certification ECU (smart key ECU assembly))	Engine switch off, engine switch pressed with key held near engine switch*	Pulse generation (See waveform 2)
   E51-10 (VC5) - E51-6 (AGND)	Input	W - B	Transponder key amplifier power supply (Power supplied from certification ECU (smart key ECU assembly) when transponder key amplifier built into engine switch activated)	Engine switch off, key not in cabin, within 30 seconds after engine switch pressed	Pulse generation (See waveform 3)

   Tip:

   *: Remove the transmitter battery before performing this inspection.

3. Using an oscilloscope, check the waveform.

   Note:

   The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

   1. 

      Waveform 1 (Reference)

      Table 1. Measurement Condition

      Item	Content
      Tester Connection	E51-7 (TXCT) - E51-6 (AGND)
      Tool Setting	2 V/DIV., 20 ms./DIV.
      Condition	Engine switch off, key not in cabin, within 30 seconds after engine switch pressed

   2. 

      Waveform 2 (Reference)

      Table 2. Measurement Condition

      Item	Content
      Tester Connection	E51-8 (CODE) - E51-6 (AGND)
      Tool Setting	1 V/DIV., 20 ms./DIV.
      Condition	Engine switch off, engine switch pressed with key held near engine switch*

      Tip:

      *: Remove the transmitter battery before performing this inspection.

   3. 

      Waveform 3 (Reference)

      Table 3. Measurement Condition

      Item	Content
      Tester Connection	E51-10 (VC5) - E51-6 (AGND)
      Tool Setting	2 V/DIV., 200 ms./DIV.
      Condition	Engine switch off, key not in cabin, within 30 seconds after engine switch pressed

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

1. Disconnect the E49 and E50 certification ECU (smart key ECU assembly) connector.

2. Measure the voltage and resistance according to the value(s) in the table below.

   Terminal No. (Symbol)	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
   E49-1 (+B) - E49-10 (E)	Input	B - BR	+B power supply	Always	11 to 14 V	-
   E49-10 (E) - Body ground	-	BR - Body ground	Ground	Always	Below 1 Ω	-
   E50-33 (CUTB) - E49-10 (E)	Input	SB - BR	Stand by power	Always	11 to 14 V	-

3. Reconnect the E49 and E50 certification ECU (smart key ECU assembly) connector.

4. Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
   E49-20 (IG1D) - E49-10 (E)	Output	G - BR	Ignition power supply	Engine switch off → on (IG)	Below 1 V → 11 to 14 V	-
   E50-2 (TXCT) - E49-24 (AGND)	Output	BE - B	Signal output to transponder key amplifier	Engine switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed	Below 1 V	BCC Malfunction Abnormal Status Different Encrypt Code Different Serial Number Frame Error Response
   E50-1 (CODE) - E49-24 (AGND)	Input	SB - B	Signal input from transponder key amplifier	Engine switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed	Below 1 V
   E50-20 (VC5) - E49-24 (AGND)	Output	W - B	Transponder key amplifier power supply	Engine switch off, brake pedal not depressed, 30 seconds or more elapsed after driver door opened and then closed	Below 1 V
   E49-24 (AGND) - Body ground	-	B - Body ground	Transponder key amplifier ground	Always	Below 1 Ω
   E49-3 (EFII) - E49-10 (E)*	Input	GR - BR	EFI communication input (Signal input from ECM to certification ECU (smart key ECU assembly))	Engine switch off	11 to 14 V	B2799 B279A EFI Code Receive Engine Start Request
   E50-35 (EFIO) - E49-10 (E)*	Output	V - BR	EFI communication output (Signal output from certification ECU (smart key ECU assembly) to ECM)	Engine switch off	11 to 14 V

   • *: for LHD

5. Check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
   E50-2 (TXCT) - E49-24 (AGND)	Output	BE - B	Signal output to transponder key amplifier (Code sent from certification ECU (smart key ECU assembly) to transponder key amplifier built into engine switch, and then transmitted by transponder key amplifier antenna as radio waves)	Engine switch off, key not in cabin, within 30 seconds after engine switch pressed	Pulse generation (See waveform 1)	BCC Malfunction Abnormal Status Different Encrypt Code Different Serial Number Frame Error Response
   E50-1 (CODE) - E49-24 (AGND)	Input	SB - B	Signal input from transponder key amplifier (Radio waves from transponder key amplifier built into engine switch used to detect key information. Key information then sent to certification ECU (smart key ECU assembly))	Engine switch off, engine switch pressed with key held near engine switch Tip: Remove the transmitter battery before performing this inspection.	Pulse generation (See waveform 2)
   E50-20 (VC5) - E49-24 (AGND)	Output	W - B	Transponder key amplifier power supply (Power supplied from certification ECU (smart key ECU assembly) when transponder key amplifier built into engine switch activated)	Engine switch off, key not in cabin, within 30 seconds after engine switch pressed	Pulse generation (See waveform 3)
   E49-3 (EFII) - E49-10 (E)*	Input	GR - BR	EFI communication input (Signal input from ECM to certification ECU (smart key ECU assembly))	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected	Pulse generation (See waveform 4)	B2799 B279A EFI Code Receive Engine Start Request
   E50-35 (EFIO) - E49-10 (E)*	Output	V - BR	EFI communication output (Signal output from certification ECU (smart key ECU assembly) to ECM)	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected	Pulse generation (See waveform 5)

   • *: for LHD

6. Using an oscilloscope, check the waveform.

   Note:

   The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

   1. 

      Waveform 1 (Reference)

      Table 4. Measurement Condition

      Item	Content
      Tester Connection	E50-2 (TXCT) - E49-24 (AGND)
      Tool Setting	1 V/DIV., 20 ms./DIV.
      Condition	Engine switch off, key not in cabin, within 30 seconds after engine switch pressed

   2. 

      Waveform 2 (Reference)

      Table 5. Measurement Condition

      Item	Content
      Tester Connection	E50-1 (CODE) - E49-24 (AGND)
      Tool Setting	2 V/DIV., 20 ms./DIV.
      Condition	Engine switch off, engine switch pressed with key held near engine switch*

      Tip:

      *: Remove the transmitter battery before performing this inspection.

   3. 

      Waveform 3 (Reference)

      Table 6. Measurement Condition

      Item	Content
      Tester Connection	E50-20 (VC5) - E49-24 (AGND)
      Tool Setting	2 V/DIV., 200 ms./DIV.
      Condition	Engine switch off, key not in cabin, within 30 seconds after engine switch pressed

   4. Waveform 4 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Table 7. Measurement Condition

      Item	Content
      Tester Connection	E49-3 (EFII) - E49-10 (E)*
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

      • *: for LHD

   5. Waveform 5 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Table 8. Measurement Condition

      Item	Content
      Tester Connection	E50-35 (EFIO) - E49-10 (E)*
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

      • *: for LHD

CHECK ID CODE BOX (IMMOBILISER CODE ECU) (for RHD)

1. Disconnect the E48 ID code box (immobiliser code ECU) connector.

2. Measure the voltage and resistance according to the value(s) in the table below.

   Terminal No. (Symbol)	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
   E48-1 (+B) - Body ground	Input	R - Body ground	+B power supply	Always	11 to 14 V	B2789
   E48-5 (GND) - Body ground	-	W-B - Body ground	Ground	Always	Below 1 Ω	B2789

3. Reconnect the E48 ID code box (immobiliser code ECU) connector.

4. Measure the voltage and check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
   E48-3 (EFII) - E48-5 (GND)	Input	GR - W-B	EFI communication input (Signal input from ECM to ID code box (immobiliser code ECU))	Engine switch off	11 to 14 V	B2799 B279A EFI Code Receive Engine Start Request
   E48-4 (EFIO) - E48-5 (GND)	Output	V - W-B	EFI communication output (Signal output from ID code box (immobiliser code ECU) to ECM)	Engine switch off	11 to 14 V
   E48-3 (EFII) - E48-5 (GND)	Input	GR - W-B	EFI communication input (Signal input from ECM to ID code box (immobiliser code ECU))	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected	Pulse generation (See waveform 1)
   E48-4 (EFIO) - E48-5 (GND)	Output	V - W-B	EFI communication output (Signal output from ID code box (immobiliser code ECU) to ECM)	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected	Pulse generation (See waveform 2)

5. Using an oscilloscope, check the waveform.

   Note:

   The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

   1. Waveform 1 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Table 9. Measurement Condition

      Item	Content
      Tester Connection	E48-3 (EFII) - E48-5 (GND)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

   2. Waveform 2 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Table 10. Measurement Condition

      Item	Content
      Tester Connection	E48-4 (EFIO) - E48-5 (GND)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)

1. Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
   E47-1 (GND) - Body ground	-	W-B - Body ground	Ground	Always	Below 1 Ω	-
   E47-3 (IGE) - E47-1 (GND)	Input	L - W-B	Steering lock motor operation permission signal (motor operation permission signal supplied by certification ECU (smart key ECU assembly))	Steering lock motor operates when all conditions met, and then door opened: Steering unlocked Engine switch turned off	Pulse generation (See waveform 1)	Power Supply Short Unlock Request Receive Lock Request Receive
   E47-4 (SLP1) - E47-1 (GND)	Output	P - W-B	Steering lock bar position signal (signal output from steering unlock sensor)	Steering locked → unlocked*	11 to 14 V → Below 1.5 V	Sensor Value
   E47-6 (IG2) - E47-1 (GND)	Input	B - W-B	IG signal (IG2 power supply input for steering lock motor)	Engine switch off → on (IG)	Below 1 V → 11 to 14 V	B2788
   E47-7 (B) - Body ground	Input	V - Body ground	Constant power supply	Always	11 to 14 V	B2788

   Tip:

   *: The steering locks when any door is opened with the engine switch off. The steering unlocks when the engine switch is turned on (ACC).

2. Using an oscilloscope, check the waveform.

   Note:

   The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

   1. 

      *a	Steering lock motor not operating
      *b	Steering lock motor operating

      Waveform 1 (Reference)

      Table 11. Measurement Condition

      Item	Content
      Tester Connection	E47-3 (IGE) - E47-1 (GND)
      Tool Setting	2 V/DIV., 200 ms./DIV.
      Condition	Steering lock motor operates when both conditions met, and then door opened: Electrical key transmitter sub-assembly carried, engine switch turned on (IG), steering unlocked, and then engine switch turned off

CHECK ECM

1. Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.

   Terminal No. (Symbol)	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
   A34-1 (+B1) - A34-4 (E1)	Input	B - WB	Ignition power supply	Engine switch on (IG)	11 to 14 V	-
   A34-2 (+B) - A34-4 (E1)	Input	B - WB	Ignition power supply	Engine switch on (IG)	11 to 14 V	-
   A34-9 (MREL) - A34-4 (E1)	Input	GR - W-B	Ignition power supply	Engine switch on (IG)	11 to 14 V	-
   A34-15 (BATT) - A34-4 (E1)	Input	SB - W-B	+B power supply	Always	11 to 14 V	-
   A34-5 (E01) - Body ground	-	W-B - Body ground	Ground	Always	Below 1 Ω	-
   A34-4 (E1) - Body ground	-	W-B - Body ground	Ground	Always	Below 1 Ω	-
   A34-17 (E02) - Body ground	-	W-B - Body ground	Ground	Always	Below 1 Ω	-
   A34-43 (IMO) - A34-4 (E1)	Output	GR - W-B	Certification ECU (smart key ECU assembly)*1 or ID code box (immobiliser code ECU)*2 communication output	Engine switch off	11 to 14 V	-
   A34-43 (IMO) - A34-4 (E1)	Output	GR - W-B	Certification ECU (smart key ECU assembly)*1 or ID code box (immobiliser code ECU)*2 communication output	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected	Pulse generation (See waveform 1)	-
   A34-42 (IMI) - A34-4 (E1)	Input	V - W-B	Certification ECU (smart key ECU assembly)*1 or ID code box (immobiliser code ECU)*2 communication input	Engine switch off	11 to 14 V	-
   A34-42 (IMI) - A34-4 (E1)	Input	V - W-B	Certification ECU (smart key ECU assembly)*1 or ID code box (immobiliser code ECU)*2 communication input	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected	Pulse generation (See waveform 2)	-

   • *1: for LHD

   • *2: for RHD

2. Using an oscilloscope, check the waveform.

   Note:

   The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

   1. Waveform 1 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Table 12. Measurement Condition

      Item	Content
      Tester Connection	A34-43 (IMO) - A34-4 (E1)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected

   2. Waveform 2 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Table 13. Measurement Condition

      Item	Content
      Tester Connection	A34-42 (IMI) - A34-4 (E1)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after battery cable disconnected and reconnected