RM38T0EC _59 Vehicle Exterior _113746 DOOR / HATCH _0504731 POWER BACK DOOR SYSTEM U

DOOR / HATCH  POWER BACK DOOR SYSTEM  TERMINALS OF ECU  


CHECK MULTIPLEX NETWORK DOOR ECU


a.

Disconnect the U22 and U21 multiplex network door ECU connectors.

B426088N26
2.667,0.333 3.167,0.583 0.5,0.25 4.469,0.333 4.969,0.583 0.5,0.25 4.583,0.354 5.042,0.552 0.458,0.198 10 false U21 2.771,0.365 3.229,0.563 0.458,0.198 10 false U22


b.

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

Terminal No. (Symbol) Terminal Description Condition Specified Condition
U22-18 (IG) - Body ground IG power supply Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V
U22-20 (ECUB) - Body ground Auxiliary battery power supply Ignition switch off 11 to 14 V
U21-1 (B) - Body ground Auxiliary battery power supply Ignition switch off 11 to 14 V
U21-10 (GND) - Body ground Body ground Always Below 1 Ω


c.

Reconnect the U22 and U21 multiplex network door ECU connectors.


d.

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

Terminal No. (Symbol) Terminal Description Condition Specified Condition
U22-1 (DS1) - Body ground Power back door unit assembly LH (door sensor) signal Power back door not operating 7 V or higher
Power back door operating Pulse generation
(See waveform 1)
U22-2 (DS2) - Body ground Power back door unit assembly LH (door sensor) signal Power back door not operating 7 V or higher
Power back door operating Pulse generation
(See waveform 2)
U22-3 (DS12) - Body ground Power back door unit assembly RH (door sensor) signal Power back door not operating 7 V or higher
Power back door operating Pulse generation
(See waveform 1)
U22-4 (DS22) - Body ground Power back door unit assembly RH (door sensor) signal Power back door not operating 7 V or higher
Power back door operating Pulse generation
(See waveform 2)
U22-5 (DSV2) - Body ground Power back door unit assembly RH (door sensor) power supply Always 7 V or higher
U22-6 (OSR) - U22-24 (OSE) Power back door sensor assembly RH signal Power back door sensor assembly RH not pressed 4 to 6 V
Power back door sensor assembly RH pressed Below 1 V
U22-8 (BDDN) - Body ground No. 1 power back door control switch signal No. 1 power back door control switch on Below 1 V
No. 1 power back door control switch off Pulse generation
U22-10 (CLSW) - Body ground Power back door control switch signal Power back door control switch on Below 1 V
Power back door control switch off 11 to 14 V
U22-12 (LIB) - Body ground Back door lock signal Back door is locked Below 1 V
Back door is unlocked 11 to 14 V
U22-14 (KSIN) - Body ground Kick detection signal Kick door control sensor not detecting a foot → detecting a foot Pulse generation
(See waveform 3)
U22-16 (BZR+) - Body ground Power back door warning buzzer signal Power back door warning buzzer sounding Pulse generation
Power back door warning buzzer not sounding Below 1 V
U22-19 (DSG2) - Body ground Power back door unit assembly RH (door sensor) ground Always Below 1 V
U22-21 (DSG) - Body ground Power back door unit assembly LH (door sensor) ground Always Below 1 V
U22-25 (DSV) - Body ground Power back door unit assembly LH (door sensor) power supply Always 7 V or higher
U22-26 (OSL) - U22-24 (OSE) Power back door sensor assembly LH signal Power back door sensor assembly LH not pressed 4 to 6 V
Power back door sensor assembly LH pressed Below 1 V
U21-4 (DC+) - U21-3 (DC-) Back door lock assembly (back door lock motor) circuit Back door lock motor operating 11 to 14 V
Back door lock motor not operating Below 1 V

i.
E357125N01
2.854,1.76 3.313,1.958 0.458,0.198 10 false GND

Using an oscilloscope, check waveform 1.

Waveform 1 (Reference)
Item Condition
Tester Connection
·

U22-1 (DS1) - Body ground

·

U22-3 (DS12) - Body ground


Tool setting 2 V/DIV., 2 ms./DIV.
Vehicle condition Power back door operating

HINT:

The period changes in accordance to the speed at which the power back door is opened and closed.



ii.
E357126N01
2.854,1.75 3.313,1.948 0.458,0.198 10 false GND

Using an oscilloscope, check waveform 2.

Waveform 2 (Reference)
Item Condition
Tester Connection
·

U22-2 (DS2) - Body ground

·

U22-4 (DS22) - Body ground


Tool setting 2 V/DIV., 2 ms./DIV.
Vehicle condition Power back door operating

HINT:

The period changes in accordance to the speed at which the power back door is opened and closed.



iii.
E356634C01
0.313,1.625 0.771,1.823 0.458,0.198 10 false GND 1.823,1.948 2.281,2.146 0.458,0.198 10 false *a
*a Kick detection signal


Using an oscilloscope, check waveform 3.

Waveform 3 (Reference)
Item Condition
Tester Connection U22-14 (KSIN) - Body ground
Tool setting 2 V/DIV., 50 ms./DIV.
Vehicle condition Kick door control sensor not detecting a foot → detecting a foot




CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY


E475470E01
4.448,3.271 4.833,3.5 0.385,0.229 2.333,4.521 2.719,4.75 0.385,0.229 4.531,4.5 4.917,4.729 0.385,0.229 2.167,1.104 2.552,1.333 0.385,0.229 1.146,6.104 1.531,6.333 0.385,0.229 2.938,6.104 3.323,6.333 0.385,0.229 4.25,6.104 4.635,6.333 0.385,0.229 3.438,7.781 3.823,8.01 0.385,0.229 2.333,3.271 2.719,3.5 0.385,0.229 5.26,6.104 5.646,6.333 0.385,0.229 6.26,6.104 6.646,6.333 0.385,0.229 3.781,0.271 4.167,0.5 0.385,0.229 2.167,1.438 2.552,1.667 0.385,0.229 0.958,1.875 1.271,2.073 0.313,0.198 10 false 8K 1.156,2.385 1.469,2.583 0.313,0.198 10 false 8H 0.979,1.083 1.292,1.281 0.313,0.198 10 false 8F 0.969,1.594 1.281,1.792 0.313,0.198 10 false 8E 2.25,1.469 2.708,1.667 0.458,0.198 10 false I85 3.865,0.292 4.25,0.479 0.385,0.188 10 false MB 2.427,3.323 2.896,3.531 0.469,0.208 10 false I85 4.542,3.313 5,3.51 0.458,0.198 10 false I86 3.052,6.146 3.51,6.344 0.458,0.198 10 false 8E 3.542,7.813 4,8.01 0.458,0.198 10 false MB 6.031,1.729 6.344,1.927 0.313,0.198 10 false 8B 6.031,1.146 6.344,1.344 0.313,0.198 10 false 8C 0.969,2.146 1.281,2.344 0.313,0.198 10 false 8J 4.625,4.552 4.938,4.75 0.313,0.198 10 false 8B 2.448,4.563 2.76,4.76 0.313,0.198 10 false 8C 1.26,6.135 1.573,6.333 0.313,0.198 10 false 8F 4.365,6.146 4.677,6.344 0.313,0.198 10 false 8K 5.375,6.146 5.688,6.344 0.313,0.198 10 false 8J 6.375,6.146 6.688,6.344 0.313,0.198 10 false 8H 2.25,1.146 2.708,1.344 0.458,0.198 10 false I86

a.

Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

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


b.

Connect the power distribution box assembly connectors.


c.

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

Terminal No. (Symbol) Terminal Description Condition Specified Condition
MB-26 (BECU) - Body ground Auxiliary battery power supply Ignition switch off 11 to 14 V
MB-27 (IGR) - Body ground IG power supply Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V
MB-13 (GND1) - Body ground Body ground Always Below 1 Ω
MB-14 (GND2) - Body ground Body ground Always Below 1 Ω
MB-19 (BCTY) - Body ground Back door courtesy light switch input Back door closed 11 to 14 V
Back door open Below 1 V


d.

Install the main body ECU (multiplex network body ECU).

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


e.

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

Terminal No. (Symbol) Terminal Description Condition Specified Condition
I86-3 (LSBO) - Body ground Back door lock signal Back door is locked Below 1 V
Back door is unlocked 11 to 14 V
I86-21 (PBDS) - Body ground Power back door control switch signal Power back door control switch off Pulse generation
Power back door control switch on Below 1 V



CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


for HEV Model: Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Entry Function, HEV Model)>TERMINALS OF ECU

for Gasoline Model: Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>SMART ENTRY AND START SYSTEM (for Entry Function, Gasoline Model)>TERMINALS OF ECU