RM35X0E _51 Engine / Hybrid System _078884 CRUISE CONTROL _0383152 FRONT RADAR SENSOR SYSTEM U

CRUISE CONTROL  FRONT RADAR SENSOR SYSTEM  TERMINALS OF ECU  


CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY


NOTICE:
·

Turning the ignition switch to 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.



A402620E05
3.365,0.063 3.792,0.302 0.427,0.24 3.448,0.104 3.906,0.302 0.458,0.198 10 false A3

a.

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

Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition

*1: w/o Stop and Start System

*2: w/ Stop and Start System

A3-8 (IGB) - A3-1 (SGND) B - W-B Power source Ignition switch ON 11 to 14 V*1
10.5 to 16 V*2
Ignition switch off Below 1 V
A3-1 (SGND) - Body ground W-B - Body ground Ground Always Below 1 Ω


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) Wiring Color Terminal Description Condition Specified Condition
A3-5 (CA1P) - A3-1 (SGND) L - W-B CAN communication signal Ignition switch to ON Pulse generation
(See waveform 1)
A3-6 (CA1N) - A3-1 (SGND) W - W-B Pulse generation
(See waveform 2)
A3-3 (CA2H) - A3-1 (SGND) R - W-B Pulse generation
(See waveform 1)
A3-2 (CA2L) - A3-1 (SGND) W - W-B Pulse generation
(See waveform 2)

i.
C414523E01
2.76,0.313 3.375,0.51 0.615,0.198 10 false 1 V/DIV. 1.427,1.927 2.135,2.125 0.708,0.198 10 false 10 μs/DIV.

WAVEFORM 1

Item Content
Tester Connection Between A3-5 (CA1P) and A3-1 (SGND)
Between A3-3 (CA2H) and A3-1 (SGND)
Tool Setting 1 V/DIV., 10 μs/DIV.
Condition Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.



ii.
C414517E02
1.448,1.917 2.979,2.115 1.531,0.198 10 false 10 μs/DIV. 2.771,0.313 3.313,0.51 0.542,0.198 10 false 1 V/DIV.

WAVEFORM 2

Item Content
Tester Connection Between A3-6 (CA1N) and A3-1 (SGND)
Between A3-2 (CA2L) and A3-1 (SGND)
Tool Setting 1 V/DIV., 10 μs/DIV.
Condition Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.