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

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

*A

for LHD

*B

for RHD

1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

   Click here

2. Reconnect the instrument panel junction block assembly connectors.

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

   Terminal No. (Symbol)	Wiring Color	Input/Output	Terminal Description	Condition	Specified Condition	Related Data List Item
   MB-11 (GND1) - Body ground	-	-	Ground	Always	Below 1 Ω	-
   MB-30 (ACC) - Body ground	-	Input	ACC power supply	Engine switch on (ACC)	11 to 14 V	ACC SW
   				Engine switch off	Below 1 V
   MB-31 (BECU) - Body ground	-	Input	Battery power supply	Always	11 to 14 V	-
   MB-32 (IG) - Body ground	-	Input	IG power supply	Engine switch on (IG)	11 to 14 V	IG SW
   				Engine switch off	Below 1 V

4. Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.

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

   Terminal No. (Symbol)	Wiring Color	Input/Output	Terminal Description	Condition	Specified Condition	Related Data List Item
   3C-29 (BZR) - Body ground	L - Body ground	Output	Wireless door lock buzzer output	Active Test Wireless Buzzer is OFF	Below 1 V	-
   				Active Test Wireless Buzzer is ON	Pulse generation (frequency: 2 kHz, high voltage: 11 to 14 V, low voltage: below 1 V)

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

1. Disconnect the K62 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)	Wiring Color	Input/Output	Terminal Description	Condition	Specified Condition	Related Data List Item
   K62-4 (+B) - Body ground	W - Body ground	Input	Battery power supply	Always	11 to 14 V	-
   K62-18 (E) - Body ground	W-B - Body ground	-	Ground	Always	Below 1 Ω	-

3. Reconnect the K62 certification ECU (smart key ECU assembly) connector.

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

   Terminal No. (Symbol)	Wiring Color	Input/Output	Terminal Description	Condition	Specified Condition	Related Data List Item
   R8-18 (RCO) - K62-18 (E)	B - W-B	Output	Output to door control receiver (Power supply for door control receiver. Certification ECU (smart key ECU assembly) outputs 5 V when receiver starts operating.)	Procedure: Turn engine switch off Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area Press lock or unlock switch of electrical key transmitter sub-assembly	Plus generation (See waveform 1)	-
   R8-19 (RDAM) - K62-18 (E)	G - W-B	Input	Door control receiver communication circuit	Procedure: Turn engine switch off Lock all doors Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area Press lock or unlock switch of electrical key transmitter sub-assembly	Plus generation (See waveform 2)	-
   R8-20 (CSEL) - K62-18 (E)	BE - W-B	Output	Communication channel switching circuit	Procedure: Turn engine switch off Close all doors	No pulse generation → Pulse generation	-

5. 

   *a	Before lock or unlock switch of electrical key transmitter sub-assembly pressed
   *b	After lock or unlock switch of electrical key transmitter sub-assembly pressed

   Using an oscilloscope, check waveform 1.

   Tech Tips

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

   Waveform 1 (Reference)

   Item	Content
   Tester connection	R8-18 (RCO) - K62-18 (E)
   Tool setting	2 V/DIV., 500 ms/DIV.
   Condition	Procedure: Turn engine switch off Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area Press lock or unlock switch of electrical key transmitter sub-assembly

6. 

   *a	Before lock or unlock switch of electrical key transmitter sub-assembly pressed
   *b	After lock or unlock switch of electrical key transmitter sub-assembly pressed

   Using an oscilloscope, check waveform 2.

   Tech Tips

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

   Waveform 2 (Reference)

   Item	Content
   Tester connection	R8-19 (RDAM) - K62-18 (E)
   Tool setting	5 V/DIV., 500 ms/DIV.
   Condition	Procedure: Turn engine switch off Lock all doors Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area Press lock or unlock switch of electrical key transmitter sub-assembly