TERMINALS OF ECU
CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY
(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
|
|
d1-8 (IGB) - d1-1 (SGND)
|
R - W-B
|
Power source
|
Ignition switch ON
|
11 to 14 V
|
|
d1-1 (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, 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
|
|
d1-3 (CA2H) - d1-1 (SGND)
|
R - W-B
|
CAN communication signal
|
Ignition switch ON
|
Pulse generation
(See waveform 1)
|
|
d1-2 (CA2L) - d1-1 (SGND)
|
W - W-B
|
CAN communication signal
|
Ignition switch ON
|
Pulse generation
(See waveform 2)
|
|
d1-5 (CA1P) - d1-1 (SGND)
|
Y - W-B
|
CAN communication signal
|
Ignition switch ON
|
Pulse generation
(See waveform 1)
|
|
d1-6 (CA1N) - d1-1 (SGND)
|
W - W-B
|
CAN communication signal
|
Ignition switch ON
|
Pulse generation
(See waveform 2)
|
(1) Waveform 1
|
Item
|
Content
|
|
Terminal Name
|
Between d1-3 (CA2H) and d1-1 (SGND)
Between d1-5 (CA1P) and d1-1 (SGND)
|
|
Tester Range
|
1 V/DIV., 10 μsec./DIV.
|
|
Condition
|
Ignition switch ON
|
HINT:
The waveform varies depending on the CAN communication signal.
(2) Waveform 2
|
Item
|
Content
|
|
Terminal Name
|
Between d1-2 (CA2L) and d1-1 (SGND)
Between d1-6 (CA1N) and d1-1 (SGND)
|
|
Tester Range
|
1 V/DIV., 10 μsec./DIV.
|
|
Condition
|
Ignition switch ON
|
HINT:
The waveform varies depending on the CAN communication signal.
NOTICE:
- DTCs may be stored when connectors are disconnected during inspection. Therefore,
be sure to clear the DTCs using the Techstream once the inspection has been
completed.
- Do not apply excessive force to the W9 forward recognition camera connector.
CHECK FORWARD RECOGNITION CAMERA
(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
|
|
W9-7 (IGB) - W9-10 (GND)
|
R - W-B
|
Power source
|
Ignition switch ON
|
11 to 14 V
|
|
Ignition switch off
|
Below 1 V
|
|
W9-10 (GND) - 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, malfunction
of a CAN bus line, terminating resistor or the forward recognition camera is suspected.
|
Terminal No. (Symbol)
|
Wiring Color
|
Terminal Description
|
Condition
|
Specified Condition
|
|
W9-5 (CA1P) - W9-10 (GND)
|
BE - W-B
|
CAN communication signal
|
Ignition switch ON
|
Pulse generation
(See waveform 1)
|
|
W9-11 (CA1N) - W9-10 (GND)
|
W - W-B
|
CAN communication signal
|
Ignition switch ON
|
Pulse generation
(See waveform 2)
|
|
W9-6 (CANH) - W9-10 (GND)
|
G - W-B
|
CAN communication signal
|
Ignition switch ON
|
Pulse generation
(See waveform 1)
|
|
W9-12 (CANL) - W9-10 (GND)
|
W - W-B
|
CAN communication signal
|
Ignition switch ON
|
Pulse generation
(See waveform 2)
|
(1) Waveform 1
|
Item
|
Content
|
|
Terminal Name
|
Between W9-5 (CA1P) and W9-10 (GND)
Between W9-6 (CANH) and W9-10 (GND)
|
|
Tester Range
|
1 V/DIV., 10 μsec./DIV.
|
|
Condition
|
Ignition switch ON
|
HINT:
The waveform varies depending on the CAN communication signal.
(2) Waveform 2
|
Item
|
Content
|
|
Terminal Name
|
Between W9-11 (CA1N) and W9-10 (GND)
Between W9-12 (CANL) and W9-10 (GND)
|
|
Tester Range
|
1 V/DIV., 10 μsec./DIV.
|
|
Condition
|
Ignition switch ON
|
HINT:
The waveform varies depending on the CAN communication signal.
| 
