Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM1000000025HG6
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: GF1A (TRANSFER / 4WD / AWD): ACTIVE TORQUE SPLIT AWD SYSTEM: TERMINALS OF ECU; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]

TERMINALS OF ECU

CHECK 4WD ECU ASSEMBLY

(a) Measure the voltage and resistance of the connector.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

O176-1 (GND) - Body ground

Ground

Always

Below 1 Ω

O176-2 (BSLC) - O176-1 (GND)

4WD ECU assembly power supply

Always

11 to 14 V

O176-13 (T1H) - O176-1 (GND)

Temperature sensor (+) input

Ignition switch ON

0.5 to 4.5 V

O176-21 (T1L) - O176-1 (GND)

Temperature sensor (-) input

Ignition switch ON

0.5 to 4.5 V

O176-24 (IG1) - O176-1 (GND)

4WD ECU assembly power supply input

Ignition switch ON

11 to 14 V

O177-3 (SLC-) - O176-1 (GND)

4WD linear solenoid (electro magnetic control coupling sub-assembly) (-) output

Ignition switch ON

Below 0.5 V

O177-4 (SLC+) - O176-1 (GND)

4WD linear solenoid (electro magnetic control coupling sub-assembly) (+) output

Ignition switch ON

Below 0.5 V

O177-17 (CANH) - O177-26 (CANL)

CAN communication line

Ignition switch off

54 to 69 Ω

O177-18 (OMS) - O176-1 (GND)

AWD control switch (No. 2 combination switch assembly) input

Ignition switch ON (Switch not operated)

11 to 14 V

O177-19 (OMSG) - O176-1 (GND)

AWD control switch (No. 2 combination switch assembly) ground

Always

Below 10 Ω