TERMINALS OF ECU
CHECK FORWARD RECOGNITION CAMERA
NOTICE:
(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 |
---|---|---|---|---|
U14-1 (HTR) - U14-10 (GND) | B - BR | Forward recognition with heater hood sub-assembly operation signal | Engine switch on (IG) Forward recognition with heater hood sub-assembly not operating | 11 to 14 V |
Engine switch on (IG) Forward recognition with heater hood sub-assembly operating | Below 1 V | |||
U14-7 (IGB) - U14-10 (GND) | SB - BR | Power source | Engine switch on (IG) | 11 to 14 V |
Engine switch off | Below 1 V | |||
U14-8 (BZ) - U14-10 (GND) | W - BR | Skid control buzzer assembly output | Engine switch on (IG), buzzer not sounding | 11 to 14 V |
Engine switch on (IG), buzzer sounding | Below 1 V | |||
U14-10 (GND) - Body ground | BR - 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 forward recognition camera is suspected.
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
U14-5 (CA1P) - U14-10 (GND) | V - BR | CAN communication signal | Engine switch on (IG) | Pulse generation (See waveform 1) |
U14-6 (CANH) - U14-10 (GND) | B - BR | CAN communication signal | Engine switch on (IG) | Pulse generation (See waveform 1) |
U14-11 (CA1N) - U14-10 (GND) | P - BR | CAN communication signal | Engine switch on (IG) | Pulse generation (See waveform 2) |
U14-12 (CANL) - U14-10 (GND) | W - BR | CAN communication signal | Engine switch on (IG) | Pulse generation (See waveform 2) |
(1) Waveform 1
Item | Content |
---|---|
Tester Connection |
|
Tool Setting | 1 V/DIV., 10 μs./DIV. |
Condition | Engine switch on (IG) |
HINT:
The waveform varies depending on the CAN communication signal.
(2) Waveform 2
Item | Content |
---|---|
Tester Connection |
|
Tool Setting | 1 V/DIV., 10 μs./DIV. |
Condition | Engine switch on (IG) |
HINT:
The waveform varies depending on the CAN communication signal.
CHECK STEERING VIBRATION 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.
(a) Measure the voltage and resistance according to the value(s) in the table below.
Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
---|---|---|---|
z11-4 (IG) - z11-1 (GND) | Power source | Engine switch on (IG) | Pulse generation |
Engine switch off | Below 1 V | ||
B-1 (M+) - z11-1 (GND) | Steering vibration operation signal | Engine switch on (IG) Steering vibration operating | 11 to 14 V |
Engine switch on (IG) Steering vibration not operating | Below 1 V | ||
z11-1 (GND) - Body ground | Ground | Always | Below 1 Ω |
(b) Measure the waveform according to the value(s) in the table below.
Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
---|---|---|---|
A-2 (LDA) - z11-1 (GND) | LIN communication signal | Engine switch on (IG) | Pulse generation |
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