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

CHECK TRANSPONDER KEY ECU ASSEMBLY

1. Disconnect the E21 transponder key ECU assembly connector.

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

   Tip:

   Measure the values on the wire harness side with the connector disconnected.

   Tester Connection	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item
   E21-1 (+B) - E21-5 (GND)	Input	W - BR	Battery	Always	11 to 14 V	+B
   E21-2 (IG) - E21-5 (GND)	Input	B - BR	Ignition switch signal	Ignition switch off	Below 1 V	IG SW
   				Ignition switch ON	11 to 14 V
   E21-3 (KSW) - E21-5 (GND)	Input	V - BR	Unlock warning switch signal	No key in ignition key cylinder	10 kΩ or higher	Key SW/B2780
   				Key in ignition key cylinder	Below 1 Ω
   E21-5 (GND) - Body ground	-	BR - Body ground	Ground	Always	Below 1 Ω	-

   If the result is not as specified, there may be a malfunction on the wire harness side.

3. Reconnect the E21 transponder key ECU assembly connector.

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

   Tester Connection	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item
   E21-8 (IND) - E21-5 (GND)	Output	Y - BR	Security indicator signal	No key in ignition key cylinder, or 20 sec. elapsed after turning ignition switch to ACC or off (immobiliser system set)	Pulse generation	Immobiliser
   				Key in ignition key cylinder (immobiliser system unset)	Below 1 V
   E21-9 (D) - E21-5 (GND)	Input/Output	LG - BR	DLC3 communication	Without communication	Below 1 V	-
   				During communication	Pulse generation
   E21-4 (ANT1) - E21-5 (GND)	Input/Output	V - BR	Transponder key amplifier power source	No key in ignition key cylinder	4 to 6 V	-
   				Within 3 seconds of inserting key into ignition key cylinder	Pulse generation (See waveform 1)
   E21-15 (ANT2) - E21-5 (GND)	Input/Output	W - BR	Transponder key amplifier communication signal	No key in ignition key cylinder	4 to 6 V	-
   				Within 3 seconds of inserting key into ignition key cylinder	Pulse generation (See waveform 2)
   E21-12 (EFII) - E21-5 (GND)	Output	LG - BR	ECM input signal	Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal	Pulse generation (See waveform 3)	-
   E21-13 (EFIO) - E21-5 (GND)	Input	P - BR	ECM output signal	Ignition switch off	Below 1 V	-
   				Ignition switch ON	Pulse generation (See waveform 4)

   If the result is not as specified, the transponder key ECU assembly may be malfunctioning.

5. Using an oscilloscope, check the waveform.

   1. Waveform 1 (Reference)

      

      Tester Connection	E21-4 (ANT1) - E21-5 (GND)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds of inserting key into ignition key cylinder

   2. Waveform 2 (Reference)

      

      Tester Connection	E21-15 (ANT2) - E21-5 (GND)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds of inserting key into ignition key cylinder

   3. Waveform 3 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Tester Connection	E21-12 (EFII) - E21-5 (GND)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

   4. Waveform 4 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Tester Connection	E21-13 (EFIO) - E21-5 (GND)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Ignition switch ON

CHECK ECM (for 1ZR-FE, 2ZR-FE, 1NR-FE or 1ZR-FAE)

1. Using an oscilloscope, check the waveform.

   1. Waveform 1 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Tester Connection	A50-29 (IMO) - B31-16 (E1)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

   2. Waveform 2 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Tester Connection	A50-28 (IMI) - B31-16 (E1)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Ignition switch ON

CHECK ECM (for 1ND-TV)

1. Using an oscilloscope, check the waveform.

   1. Waveform 1 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Tester Connection	A101-78 (IMO) - A101-2 (E1)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

   2. Waveform 2 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Tester Connection	A101-77 (IMI) - A101-2 (E1)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Ignition switch ON

CHECK ECM (for 1AD-FTV)

1. Using an oscilloscope, check the waveform.

   1. Waveform 1 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Tester Connection	A118-15 (IMO) - B164-109 (E1)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

   2. Waveform 2 (Reference)

      

      *a

      Approximately 160 ms

      *b

      Approximately 270 ms

      Tester Connection	A118-16 (IMI) - B164-109 (E1)
      Tool Setting	2 V/DIV., 500 ms./DIV.
      Condition	Ignition switch ON