DOOR LOCK  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)


B332794N27
1.188,3.052 1.552,3.271 0.365,0.219 4.146,3.052 4.51,3.271 0.365,0.219 6.344,3.052 6.708,3.271 0.365,0.219 1.635,4.615 2,4.833 0.365,0.219 5.521,4.604 5.885,4.823 0.365,0.219 1.427,6.302 1.792,6.521 0.365,0.219 5.135,6.302 5.5,6.521 0.365,0.219 3.333,7.948 3.698,8.167 0.365,0.219 3.688,1.427 4,1.427 false 3.688,1.927 4,1.927 false 5.146,1.104 5.146,0.313 5.146,0.313 5.333,0.313 false 0.719,1.875 0.948,2.104 0.229,0.229 10 false 3B 1.115,0.865 1.344,1.094 0.229,0.229 10 false 3E 0.771,0.865 1,1.094 0.229,0.229 10 false 3A 1.458,0.865 1.688,1.094 0.229,0.229 10 false 3D 1.823,0.865 2.052,1.094 0.229,0.229 10 false 3C 4.073,1.333 4.406,1.583 0.333,0.25 10 false E31 4.073,1.833 4.625,2.063 0.552,0.229 10 false E107 5.385,0.219 5.688,0.427 0.302,0.208 10 false MB 1.219,3.073 1.635,3.25 0.417,0.177 10 false E107 4.208,3.083 4.542,3.333 0.333,0.25 10 false E31 6.448,3.083 6.781,3.333 0.333,0.25 10 false 3B 1.729,4.646 2.063,4.896 0.333,0.25 10 false 3A 5.615,4.635 5.948,4.885 0.333,0.25 10 false 3E 1.521,6.333 1.854,6.583 0.333,0.25 10 false 3D 5.229,6.333 5.563,6.583 0.333,0.25 10 false 3C 3.406,7.979 3.74,8.229 0.333,0.25 10 false MB

a.

Disconnect the MB main body ECU (multiplex network body ECU) connector.


b.

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

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


c.

Reconnect the instrument panel junction block assembly connectors.


d.

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

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
MB-11 (GND1) - Body ground - Ground Always Below 1 Ω
MB-30 (BECU) - Body ground - Battery power supply Always 11 to 14 V
MB-29 (ACC) - Body ground - ACC power supply Engine switch on (ACC) 11 to 14 V
MB-29 (ACC) - Body ground - ACC power supply Engine switch off Below 1 V
MB-32 (IG) - Body ground - Engine switch power supply Engine switch on (IG) 11 to 14 V
MB-32 (IG) - Body ground - Engine switch power supply Engine switch off Below 1 V


e.

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

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>INSTALLATION


f.

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

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
3C-5 (ACT-) - Body ground SB - Body ground Door lock motor unlock drive output (all doors) Door control switch or driver door key cylinder off Below 1 V
3C-5 (ACT-) - Body ground SB - Body ground Door lock motor unlock drive output (all doors) Door control switch or driver door key cylinder unlocked 11 to 14 V
3E-1 (ACT-) - Body ground SB - Body ground Door lock motor unlock drive output (all doors) Door control switch or driver door key cylinder off Below 1 V
3E-1 (ACT-) - Body ground SB - Body ground Door lock motor unlock drive output (all doors) Door control switch or driver door key cylinder unlocked 11 to 14 V
3E-2 (ACT-) - Body ground SB - Body ground Door lock motor unlock drive output (all doors) Door control switch or driver door key cylinder off Below 1 V
3E-2 (ACT-) - Body ground SB - Body ground Door lock motor unlock drive output (all doors) Door control switch or driver door key cylinder unlocked 11 to 14 V
3C-4 (ACT-) - Body ground LG - Body ground Door lock motor unlock drive output (all doors) Door control switch or driver door key cylinder off Below 1 V
3C-4 (ACT-) - Body ground LG - Body ground Door lock motor unlock drive output (all doors) Door control switch or driver door key cylinder unlocked 11 to 14 V
3C-14 (ACT+) - Body ground R - Body ground Door lock motor lock drive output (all doors) Door control switch or driver door key cylinder off Below 1 V
3C-14 (ACT+) - Body ground R - Body ground Door lock motor lock drive output (all doors) Door control switch or driver door key cylinder locked 11 to 14 V
3C-13 (ACT+) - Body ground BE - Body ground Door lock motor lock drive output (all doors) Door control switch or driver door key cylinder off Below 1 V
3C-13 (ACT+) - Body ground BE - Body ground Door lock motor lock drive output (all doors) Door control switch or driver door key cylinder locked 11 to 14 V
3E-8 (ACT+) - Body ground R - Body ground Door lock motor lock drive output (all doors) Door control switch or driver door key cylinder off Below 1 V
3E-8 (ACT+) - Body ground R - Body ground Door lock motor lock drive output (all doors) Door control switch or driver door key cylinder locked 11 to 14 V
3E-9 (ACT+) - Body ground BE - Body ground Door lock motor lock drive output (all doors) Door control switch or driver door key cylinder off Below 1 V
3E-9 (ACT+) - Body ground BE - Body ground Door lock motor lock drive output (all doors) Door control switch or driver door key cylinder locked 11 to 14 V
E31-19 (FRCY) - Body ground V - Body ground Front door courtesy light switch assembly (for RH) input Front door RH open Below 1 V
E31-19 (FRCY) - Body ground V - Body ground Front door courtesy light switch assembly (for RH) input Front door RH closed 11 to 14 V
3E-37 (FLCY) - Body ground W - Body ground Front door courtesy light switch assembly (for LH) input Front door LH open Below 1 V
3E-37 (FLCY) - Body ground W - Body ground Front door courtesy light switch assembly (for LH) input Front door LH closed 11 to 14 V
E31-24 (LCTY) - Body ground SB - Body ground Rear door courtesy light switch assembly (for LH) input Rear door LH open Below 1 V
E31-24 (LCTY) - Body ground SB - Body ground Rear door courtesy light switch assembly (for LH) input Rear door LH closed 11 to 14 V
E31-6 (RCTY) - Body ground LG - Body ground Rear door courtesy light switch assembly (for RH) input Rear door RH open Below 1 V
E31-6 (RCTY) - Body ground LG - Body ground Rear door courtesy light switch assembly (for RH) input Rear door RH closed 11 to 14 V
E31-7 (LSFL) - Body ground Y - Body ground Front door LH unlock detection switch input Front door LH unlocked Below 1 V
E31-7 (LSFL) - Body ground Y - Body ground Front door LH unlock detection switch input Front door LH locked 11 to 14 V
E31-18 (LSFR) - Body ground LG - Body ground Front door RH unlock detection switch input Front door RH unlocked Below 1 V
E31-18 (LSFR) - Body ground LG - Body ground Front door RH unlock detection switch input Front door RH locked 11 to 14 V
3E-38 (LSR) - Body ground Y - Body ground Rear door RH unlock detection switch input Rear door RH or LH unlocked Below 1 V
3E-38 (LSR) - Body ground Y - Body ground Rear door RH unlock detection switch input Rear door RH and LH locked 11 to 14 V
3E-23 (LSR) - Body ground Y - Body ground Rear door LH unlock detection switch input Rear door LH or RH unlocked Below 1 V
3E-23 (LSR) - Body ground Y - Body ground Rear door LH unlock detection switch input Rear door LH and RH locked 11 to 14 V
3E-34 (LGCY) - Body ground LG - Body ground Luggage door courtesy light switch input Luggage compartment door open Below 1 V
3E-34 (LGCY) - Body ground LG - Body ground Luggage door courtesy light switch input Luggage compartment door closed 11 to 14 V
E31-11 (L2) - Body ground SB - Body ground Driver door key-linked lock input Driver door key cylinder turned to lock position Below 1 V
E31-11 (L2) - Body ground SB - Body ground Driver door key-linked lock input Driver door key cylinder off 11 to 14 V
E31-12 (UL2) - Body ground P - Body ground Driver door key-linked unlock input Driver door key cylinder turned to unlock position Below 1 V
E31-12 (UL2) - Body ground P - Body ground Driver door key-linked unlock input Driver door key cylinder off 11 to 14 V
3E-25 (TR+) - Body ground P - Body ground Luggage compartment door lock motor unlock drive output Luggage compartment door open switch pushed 11 to 14 V
3E-25 (TR+) - Body ground P - Body ground Luggage compartment door lock motor unlock drive output Luggage compartment door open switch not pushed Below 1 V
3A-54 (BZR) - Body ground L - Body ground Wireless door lock buzzer output
Procedure:
1.

Turn engine switch off

2.

Close all doors

3.

Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area

4.

Press lock switch of electrical key transmitter sub-assembly (wireless door lock buzzer answer-back)


Below 1 V → Pulse generation



CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


B479723N01
1.76,0.375 2.229,0.625 0.469,0.25 3.219,0.385 3.688,0.635 0.469,0.25 4.771,0.375 5.24,0.625 0.469,0.25 1.833,0.438 2.448,0.635 0.615,0.198 10 false E108 3.313,0.427 3.927,0.625 0.615,0.198 10 false E109 4.854,0.438 5.469,0.635 0.615,0.198 10 false E110

a.

Disconnect the E108 certification ECU (smart key ECU assembly) connector.


b.

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

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
E108-11 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
E108-2 (+B) - Body ground L - Body ground Battery power supply Always 11 to 14 V


c.

Reconnect the E108 certification ECU (smart key ECU assembly) connector.


d.

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

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
E109-5 (RCO) - E108-11 (E) V - W-B Output to door control with receiver ECU assembly
(Power supply for door control with receiver ECU assembly. Certification ECU (smart key ECU assembly) outputs 5 V when receiver starts operating.) 		Procedure:
1.

Engine switch off

2.

Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

3.

Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed


Pulse generation
(See waveform 1)
E109-6 (CSEL) - E108-11 (E) L - W-B Communication channel switching circuit Procedure:
1.

Engine switch off

2.

Close all doors


Below 1 V → 4.5 to 6 V → Below 1 V
E109-17 (RDAM) - E108-11 (E) Y - W-B Door control with receiver ECU assembly verifies data received from electrical key transmitter sub-assembly.
Door control with receiver ECU assembly sends data from electrical key transmitter sub-assembly to certification ECU (smart key ECU assembly) (Door control with receiver ECU assembly intermittently grounds 12 V signal from certification ECU (smart key ECU assembly)). 		Procedure:
1.

Engine switch off

2.

Close all doors

3.

Electrical key transmitter sub-assembly not inside vehicle

4.

Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

5.

Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed


Pulse generation
(See waveform 2)


e.
B251178C12
0.198,1 0.531,1.198 0.333,0.198 10 GND 1.01,1.885 1.198,2.042 0.188,0.156 10 *a 2.021,1.885 2.208,2.042 0.188,0.156 10 *b
*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.

HINT:

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 E109-5 (RCO) - E108-11 (E)
Tool setting 2 V/DIV., 500 ms/DIV.
Condition Procedure:
1.

Engine switch off

2.

Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

3.

Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed




f.
B251177C12
0.208,1 0.542,1.198 0.333,0.198 10 GND 1.021,1.896 1.208,2.052 0.188,0.156 10 *a 2.188,1.906 2.375,2.063 0.188,0.156 10 *b
*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.

HINT:

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 E109-17 (RDAM) - E108-11 (E)
Tool setting 5 V/DIV., 500 ms/DIV.
Condition Procedure:
1.

Engine switch off

2.

Close all doors

3.

Electrical key transmitter sub-assembly not inside vehicle

4.

Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

5.

Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed