Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001CUR1
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 - 06/2021]
Title: CRUISE CONTROL: FRONT CAMERA SYSTEM (for Gasoline Model): TERMINALS OF ECU; 2019 - 2021 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 06/2021]

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

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

B - W-B

Power source

Engine switch on (IG)

11 to 14 V

Engine switch off

Below 1 V

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

G - W-B

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

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

Engine switch on (IG)

Pulse generation

(See waveform 1)

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

B - W-B

CAN communication signal

Engine switch on (IG)

Pulse generation

(See waveform 2)

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

G - W-B

CAN communication signal

Engine switch on (IG)

Pulse generation

(See waveform 1)

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

R - W-B

CAN communication signal

Engine switch on (IG)

Pulse generation

(See waveform 2)

(1) WAVEFORM 1

Item

Content

Terminal Name

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

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

Tester Range

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

Terminal Name

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

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

Tester Range

1 V/DIV., 10 μs/DIV.

Condition

Engine switch on (IG)

HINT:

The waveform varies depending on the CAN communication signal.