RM3660EC _95 ADAS / AD _139716 ADVANCED DRIVER ASSISTANCE SYSTEM _0601174 FRONT RADAR SENSOR SYSTEM(for NR Series Engine) U

ADVANCED DRIVER ASSISTANCE SYSTEM  FRONT RADAR SENSOR SYSTEM(for NR Series Engine)  TERMINALS OF ECU  


CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY


A402620N10
3.365,0.063 3.792,0.302 0.427,0.24 3.5,0.125 3.958,0.323 0.458,0.198 10 false A1

NOTICE:
·

Turning the ignition switch ON with connectors disconnected may cause DTCs to be stored. Make sure to clear the DTCs after inspection has been performed.

·

Do not apply excessive force to the millimeter wave radar sensor assembly connector.



a.

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

Terminal No. (Symbol) Terminal Description Condition Specified Condition
A1-1 (SGND) - Body ground Ground Always Below 1 Ω
A1-8 (IGB) - A1-1 (SGND) Power source Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V


b.

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

HINT:

If the waveform is not similar to that shown in the illustration, a malfunction of a CAN bus line, terminating resistor, or the millimeter wave radar sensor assembly is suspected.


Terminal No. (Symbol) Terminal Description Condition Specified Condition
A1-2 (CA2L) - A1-1 (SGND) CAN communication signal Ignition switch ON Pulse generation
(See waveform 2)
A1-3 (CA2H) - A1-1 (SGND) Pulse generation
(See waveform 1)
A1-5 (CA1P) - A1-1 (SGND) Pulse generation
(See waveform 1)
A1-6 (CA1N) - A1-1 (SGND) Pulse generation
(See waveform 2)

i.
A438764N01
2.75,0.271 3.365,0.521 0.615,0.25 10 false 1 V/DIV. 1.396,1.906 2.344,2.094 0.948,0.188 10 false 10 μs./DIV. 3.031,1.406 3.344,1.698 0.313,0.292 10 false GND

Waveform 1

Item Content
Tester Connection
·

Between A1-3 (CA2H) and A1-1 (SGND)

·

Between A1-5 (CA1P) and A1-1 (SGND)


Tool Setting 1 V/DIV., 10 μs./DIV.
Condition Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.



ii.
A438765N01
2.76,0.281 3.396,0.51 0.635,0.229 10 false 1 V/DIV. 1.406,1.875 2.375,2.073 0.969,0.198 10 false 10 μs./DIV. 3.031,1.375 3.406,1.625 0.375,0.25 10 false GND

Waveform 2

Item Content
Tester Connection
·

Between A1-2 (CA2L) and A1-1 (SGND)

·

Between A1-6 (CA1N) and A1-1 (SGND)


Tool Setting 1 V/DIV., 10 μs./DIV.
Condition Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.