TERMINALS OF ECU
 CHECK DRIVING SUPPORT ECU 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 | |
G39-7 (B) - G39-28 (GND) |
B - W-B | Power source |
Engine switch on (IG) |
11 to 14 V | |
Engine switch off | Below 1 V | |
G39-28 (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, a
malfunction of a CAN bus line, terminating resistor, or the driving
support ECU assembly is suspected. |
Terminal No. (Symbol) | Wiring Color |
Terminal Description | Condition |
Specified Condition | |
G39-8 (CA1P) - G39-28 (GND) |
G - W-B | CAN communication signal |
Engine switch on (IG) |
Pulse generation (See waveform 1) | |
G39-9 (CA1N) - G39-28 (GND) |
W - W-B | CAN communication signal |
Engine switch on (IG) |
Pulse generation (See waveform 2) | |
G39-10 (CA2H) - G39-28 (GND) |
R - W-B | CAN communication signal |
Engine switch on (IG) |
Pulse generation (See waveform 1) | |
G39-11 (CA2L) - G39-28 (GND) |
W - W-B | CAN communication signal |
Engine switch on (IG) |
Pulse generation (See waveform 2) |
(1) WAVEFORM 1 |
Item | Content | |
Terminal Name | Between G39-8 (CA1P) - G39-28 (GND)
Between G39-10 (CA2H) - G39-28 (GND) | |
Tester Range | 1 V/DIV., 10 μsec./DIV. | |
Condition | Engine switch on (IG) |
HINT: The waveform varies depending on the CAN communication signal.
 (2) WAVEFORM 2 |
Item | Content | |
Terminal Name | Between G39-9 (CA1N) - G39-28 (GND)
Between G39-11 (CA2L) - G39-28 (GND) | |
Tester Range | 1 V/DIV., 10 μsec./DIV. | |
Condition | Engine switch on (IG) |
HINT: The waveform varies depending on the CAN communication signal.
 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 | |
A25-8 (IGB) - A25-1 (SGND) |
R - W-B | Power source |
Engine switch on (IG) |
11 to 14 V | |
A25-1 (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 | |
A25-3 (CA2H) - A25-1 (SGND) |
R - W-B | CAN communication signal |
Engine switch on (IG) |
Pulse generation (See waveform 1) | |
A25-2 (CA2L) - A25-1 (SGND) |
W - W-B | CAN communication signal |
Engine switch on (IG) |
Pulse generation (See waveform 2) | |
A25-5 (CA1P) - A25-1 (SGND) |
G - W-B | CAN communication signal |
Engine switch on (IG) |
Pulse generation (See waveform 1) | |
A25-6 (CA1N) - A25-1 (SGND) |
W - W-B | CAN communication signal |
Engine switch on (IG) |
Pulse generation (See waveform 2) |
(1) WAVEFORM 1 |
Item | Content | |
Terminal Name | Between A25-3 (CA2H) and A25-1 (SGND)
Between A25-5 (CA1P) and A25-1 (SGND) | |
Tester Range | 1 V/DIV., 10 μsec./DIV. | |
Condition | Engine switch on (IG) |
HINT: The waveform varies depending on the CAN communication signal.
(2) WAVEFORM 2 |
Item | Content | |
Terminal Name | Between A25-2 (CA2L) and A25-1 (SGND)
Between A25-6 (CA1N) and A25-1 (SGND) | |
Tester Range | 1 V/DIV., 10 μsec./DIV. | |
Condition | Engine switch on (IG) |
HINT: The waveform varies depending on the CAN communication signal.
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