Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000027Y41
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 - 03/2023]
Title: ADVANCED DRIVER ASSISTANCE SYSTEM: FRONT CAMERA SYSTEM: TERMINALS OF ECU; 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - 03/2023]

TERMINALS OF ECU

NOTICE:

  • DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the GTS 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)

Terminal Description

Condition

Specified Condition

T21-1 (CA2L)

CAN communication signal

-

-

T21-2 (CA2P)

CAN communication signal

-

-

T21-5 (LKSW) - T21-13 (GND)

Driving assist mode select switch, LTA switch and Vehicle-to-vehicle distance switch circuit

Driving assist mode select switch, LTA switch and Vehicle-to-vehicle distance switch OFF

10 kΩ or higher

Driving assist mode select switch pushed

Below 2.5 Ω

LTA switch pushed

114 to 126 Ω

Vehicle-to-vehicle distance switch pushed

485 to 536 Ω

T21-8 (HTR) - T21-7 (SGND)

Camera heater circuit

Ignition switch ON, heater operating

11 to 14 V

Ignition switch ON, heater not operating

Below 1 V

T21-9 (CA1N)

CAN communication signal

-

-

T21-10 (CA1P)

CAN communication signal

-

-

T21-11 (CANL)

CAN communication signal

-

-

T21-12 (CANH)

CAN communication signal

-

-

T21-16 (IGB) - T21-13 (GND)

Power source (IG)

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

CHECK ECM (for M20A-FKS)

HINT:

The standard voltage, resistance and waveform between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals is also indicated. The result of checks should be compared with the standard voltage, resistance and waveform for each pair of the terminals as displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.

(a) Measure the resistance according to the value(s) in the table below.

Terminal No. (Symbols)

Terminal Description

Condition

Specified Condition

A47-27 (CCS) - A47-28 (ECCS)

Driving assist switch, +RES switch, - switch, CANCEL switch circuit

Driving assist switch, +RES switch, - switch, CANCEL switch OFF

10 kΩ or higher

Driving assist switch pushed

Below 2.5 Ω

CANCEL switch pushed

228 to 252 Ω

+RES switch pushed

599 to 661 Ω

- switch pushed

1463 to 1617 Ω

CHECK ECM (for G16E-GTS)

HINT:

The standard voltage, resistance and waveform between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals is also indicated. The result of checks should be compared with the standard voltage, resistance and waveform for each pair of the terminals as displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.

(a) Measure the resistance according to the value(s) in the table below.

Terminal No. (Symbols)

Terminal Description

Condition

Specified Condition

A139-27 (CCS) - A139-28 (ECCS)

Driving assist switch, +RES switch, - switch, CANCEL switch circuit

Driving assist switch, +RES switch, - switch, CANCEL switch OFF

10 kΩ or higher

Driving assist switch pushed

Below 2.5 Ω

CANCEL switch pushed

228 to 252 Ω

+RES switch pushed

599 to 661 Ω

- switch pushed

1463 to 1617 Ω

CHECK HYBRID VEHICLE CONTROL ECU (for HV Model)

(a) Measure the resistance according to the value(s) in the table below.

Terminal No. (Symbols)

Terminal Description

Condition

Specified Condition

I3-29 (CCS) - I3-1 (E1)

Driving assist switch, +RES switch, - switch, CANCEL switch circuit

Driving assist switch, +RES switch, - switch, CANCEL switch OFF

10 kΩ or higher

Driving assist switch pushed

Below 2.5 Ω

CANCEL switch pushed

228 to 252 Ω

+RES switch pushed

599 to 661 Ω

- switch pushed

1463 to 1617 Ω