TERMINALS OF ECU
NOTICE:
CHECK FORWARD RECOGNITION CAMERA
(a) Disconnect the forward recognition camera connector.
*a |
Front view of wire harness connector (to Forward Recognition Camera) |
- |
- |
(b) Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
F46-7 (IGB) - F46-10 (GND) |
BE - W-B |
Power source |
Ignition switch ON |
11 to 14 V |
Ignition switch off |
Below 1 V |
|||
F46-10 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the forward recognition camera connector.
*a |
Component with harness connected (Forward Recognition Camera) |
- |
- |
(d) Measure the voltage according to the value(s) in the table below.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
F46-1 (HTR) - F46-10 (GND) |
R - W-B |
Camera heater (forward recognition hood) operation signal |
Ignition switch ON, camera heater (forward recognition hood) not operating |
11 to 14 V |
Ignition switch ON, camera heater (forward recognition hood) operating |
0 to 1.5 V |
|||
F46-8 (BZ) - F46-10 (GND) |
L - W-B |
Skid control buzzer |
Ignition switch ON, skid control buzzer not operating |
11 to 14 V |
Ignition switch ON, skid control buzzer operating |
0 to 1.5 V |
(e) 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 forward recognition camera is suspected.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
F46-5 (CA1P) - F46-10 (GND) |
L - W-B |
CAN communication signal |
Ignition switch ON |
Pulse generation (See waveform 1) |
F46-11 (CA1N) - F46-10 (GND) |
W - W-B |
CAN communication signal |
Ignition switch ON |
Pulse generation (See waveform 2) |
F46-6 (CANH) - F46-10 (GND) |
B - W-B |
CAN communication signal |
Ignition switch ON |
Pulse generation (See waveform 1) |
F46-12 (CANL) - F46-10 (GND) |
W - W-B |
CAN communication signal |
Ignition switch ON |
Pulse generation (See waveform 2) |
(1) Waveform 1
Item |
Content |
---|---|
Terminal Name |
Between F46-5 (CA1P) and F46-10 (GND) Between F46-6 (CANH) and F46-10 (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 F46-11 (CA1N) and F46-10 (GND) Between F46-12 (CANL) and F46-10 (GND) |
Tester Range |
1 V/DIV., 10 μsec./DIV. |
Condition |
Ignition switch ON |
HINT:
The waveform varies depending on the CAN communication signal.
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