TERMINALS OF ECU
NOTICE:
- DTCs may be output 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) 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 | |
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 |
(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 | |
W9-1 (HTR) - W9-10 (GND) |
V - 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 | |
W9-8 (BZ) - W9-10 (GND) |
SB - W-B |
Skid control buzzer assembly |
Ignition switch ON, skid control buzzer assembly not operating |
11 to 14 V | |
Ignition switch ON, skid control buzzer assembly 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 | |
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.
 | 
