WIRELESS DOOR LOCK CONTROL SYSTEM(w/o Entry and Start System) TERMINALS OF ECU

CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

1. Disconnect the H79, H80, DB, DE and DG ECU connectors.

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

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   H79-4 (BATB) - Body ground	BR - Body ground	Battery power supply	Always	11 to 14 V
   DG-1 (ALTB) - Body ground	W - Body ground	Battery power supply	Always	11 to 14 V
   DB-30 (BECU) - Body ground	W - Body ground	Power supply	Always	11 to 14 V
   DE-28 (GND1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
   H80-4 (GND2) - Body ground	W-B - 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 H79, H80, DB, DE and DG ECU connectors.

4. Measure the voltage according to the value(s) in the table below.

   Table 1. for LHD

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   DA-21 (DCTY) - Body ground	W - Body ground	Front door courtesy light switch LH input	Driver side door open	Below 1 V
   			Driver side door closed	11 to 14 V
   DE-20 (PCTY) - Body ground	BR - Body ground	Front door courtesy light switch RH input	Front passenger side door open	Below 1 V
   			Front passenger side door closed	11 to 14 V
   H79-8 (LCTY) - Body ground	SB - Body ground	Rear door courtesy light switch LH input	Rear door LH open	Below 1 V
   			Rear door LH closed	11 to 14 V
   DE-19 (RCTY) - Body ground	LG - Body ground	Rear door courtesy light switch RH input	Rear door RH open	Below 1 V
   			Rear door RH closed	11 to 14 V
   DA-7 (BCTY) - Body ground	LG - Body ground	Back door courtesy light switch input	Back door open	Below 1 V
   			Back door closed	11 to 14 V
   H79-25 (LSWD) - Body ground	Y - Body ground	Front door lock position switch LH input	Driver side door unlocked	Below 1 V
   			Ignition switch off, all doors closed and driver side door locked	Pulse generation (see waveform 1 or 2)
   H79-10 (LSWP) - Body ground	LG - Body ground	Front door lock position switch RH input	Front passenger side door unlocked	Below 1 V
   			Ignition switch off, all doors closed and passenger side door locked	Pulse generation (see waveform 3 or 4)
   H81-10 (LSR) - Body ground	Y - Body ground	Rear door lock position switch input	Rear door unlocked	Below 1 V
   			Ignition switch off, all doors closed and rear door locked	Pulse generation (see waveform 5 or 6)
   H81-6 (PRG) - Body ground	Y - Body ground	Door control receiver output	Key in ignition key cylinder → No key in ignition key cylinder	Pulse generation
   H81-5 (RDA) - Body ground	G - Body ground	Door control receiver input	No key in ignition key cylinder, all doors closed and transmitter switch off → on	Pulse generation

   Table 2. for RHD

   Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
   DC-6 (DCTY) - Body ground	BR - Body ground	Front door courtesy light switch RH input	Driver side door open	Below 1 V
   			Driver side door closed	11 to 14 V
   DA-24 (PCTY) - Body ground	W - Body ground	Front door courtesy light switch LH input	Front passenger side door open	Below 1 V
   			Front passenger side door closed	11 to 14 V
   H79-8 (LCTY) - Body ground	SB - Body ground	Rear door courtesy light switch LH input	Rear door LH open	Below 1 V
   			Rear door LH closed	11 to 14 V
   DE-19 (RCTY) - Body ground	LG - Body ground	Rear door courtesy light switch RH input	Rear door RH open	Below 1 V
   			Rear door RH closed	11 to 14 V
   DA-7 (BCTY) - Body ground	LG - Body ground	Back door courtesy light switch input	Back door open	Below 1 V
   			Back door closed	11 to 14 V
   H79-25 (LSWD) - Body ground	LG - Body ground	Front door lock position switch RH input	Driver side door unlocked	Below 1 V
   			Ignition switch off, all doors closed and driver side door locked	Pulse generation (see waveform 1 or 2)
   H79-10 (LSWP) - Body ground	LG - Body ground	Front door lock position switch LH input	Front passenger side door unlocked	Below 1 V
   			Ignition switch off, all doors closed and passenger side door locked	Pulse generation (see waveform 3 or 4)
   H81-10 (LSR) - Body ground	Y - Body ground	Rear door lock position switch input	Rear door unlocked	Below 1 V
   			Ignition switch off, all doors closed and rear door locked	Pulse generation (see waveform 5 or 6)
   H81-6 (PRG) - Body ground	Y - Body ground	Door control receiver output	Key in ignition key cylinder → No key in ignition key cylinder	Pulse generation
   H81-5 (RDA) - Body ground	G - Body ground	Door control receiver input	No key in ignition key cylinder, all doors closed and transmitter switch off → on	Pulse generation

   • If the result is not as specified, the ECU may have a malfunction.

5. 

   Using an oscilloscope, check waveform 1.

   Table 3. Waveform 1 (Reference)

   Item	Content
   Terminal No. (Symbol)	H79-25 (LSWD) - Body ground
   Tool Setting	5 V/DIV., 20 ms/DIV.
   Condition	Ignition switch off, all doors closed and driver side door locked

6. 

   Using an oscilloscope, check waveform 2.

   Table 4. Waveform 2 (Reference)

   Item	Content
   Terminal No. (Symbol)	H79-25 (LSWD) - Body ground
   Tool Setting	5 V/DIV., 20 ms/DIV.
   Condition	Ignition switch off, all doors closed and driver side door locked

7. 

   Using an oscilloscope, check waveform 3.

   Table 5. Waveform 3 (Reference)

   Item	Content
   Terminal No. (Symbol)	H79-10 (LSWP) - Body ground
   Tool Setting	5 V/DIV., 20 ms/DIV.
   Condition	Ignition switch off, all doors closed and front passenger side door locked

8. 

   Using an oscilloscope, check waveform 4.

   Table 6. Waveform 4 (Reference)

   Item	Content
   Terminal No. (Symbol)	H79-10 (LSWP) - Body ground
   Tool Setting	5 V/DIV., 20 ms/DIV.
   Condition	Ignition switch off, all doors closed and front passenger side door locked

9. 

   Using an oscilloscope, check waveform 5.

   Table 7. Waveform 5 (Reference)

   Item	Content
   Terminal No. (Symbol)	H81-10 (LSR) - Body ground
   Tool Setting	5 V/DIV., 20 ms/DIV.
   Condition	Ignition switch off, all doors closed and rear door locked

10. 

    Using an oscilloscope, check waveform 6.

    Table 8. Waveform 6 (Reference)

    Item	Content
    Terminal No. (Symbol)	H81-10 (LSR) - Body ground
    Tool Setting	5 V/DIV., 20 ms/DIV.
    Condition	Ignition switch off, all doors closed and rear door locked