Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001GGAV
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 09/2022]
Title: CRUISE CONTROL: FRONT CAMERA SYSTEM (for HV Model): TERMINALS OF ECU; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]

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 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

T9-1 (HTR) - T9-10 (GND)

G - W-B

Forward recognition with heater hood sub-assembly operation signal

Power switch on (IG)

Forward recognition with heater hood sub-assembly not operating

11 to 14 V

Power switch on (IG)

Forward recognition with heater hood sub-assembly operating

Below 1 V

T9-7 (IGB) - T9-10 (GND)

B - W-B

Power source

Power switch on (IG)

11 to 14 V

Power switch off

Below 1 V

T9-10 (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, 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

T9-5 (CA1P) - T9-10 (GND)

W - W-B

CAN communication signal

Power switch on (IG)

Pulse generation

(See waveform 1)

T9-11 (CA1N) - T9-10 (GND)

B - W-B

CAN communication signal

Power switch on (IG)

Pulse generation

(See waveform 2)

T9-6 (CANH) - T9-10 (GND)

G - W-B

CAN communication signal

Power switch on (IG)

Pulse generation

(See waveform 1)

T9-12 (CANL) - T9-10 (GND)

R - W-B

CAN communication signal

Power switch on (IG)

Pulse generation

(See waveform 2)

(1) Waveform 1

Item

Content

Tester Connection
  • Between T9-5 (CA1P) and T9-10 (GND)
  • Between T9-6 (CANH) and T9-10 (GND)

Tool Setting

1 V/DIV., 10 μs./DIV.

Condition

Power switch on (IG)

HINT:

The waveform varies depending on the CAN communication signal.

(2) Waveform 2

Item

Content

Tester Connection
  • Between T9-11 (CA1N) and T9-10 (GND)
  • Between T9-12 (CANL) and T9-10 (GND)

Tool Setting

1 V/DIV., 10 μs./DIV.

Condition

Power switch on (IG)

HINT:

The waveform varies depending on the CAN communication signal.