Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000269OJ
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: MIRROR (EXT): POWER MIRROR CONTROL SYSTEM (for TMC Made): TERMINALS OF ECU; 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY

(a) Disconnect the power distribution box assembly and main body ECU (multiplex network body ECU) connectors.

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

(b) Reconnect the power distribution box assembly connectors.

(c) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

MB-13 (GND1) - Body ground

Ground

Always

Below 1 Ω

MB-14 (GND2) - Body ground

Ground

Always

Below 1 Ω

MB-26 (BECU) - Body ground

Auxiliary battery power supply

Ignition switch off

11 to 14 V

MB-27 (IGR) - Body ground

Ignition power supply (IG signal)

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

(d) Install the main body ECU (multiplex network body ECU) to power distribution box assembly.

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; POWER DISTRIBUTION: MAIN BODY ECU: INSTALLATION

(e) Measure the voltage according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

8A-6 - Body ground*

Mirror heater drive voltage (Output)

  • Ignition switch ON
  • Rear defogger switch off

Below 1 V

  • Ignition switch ON
  • Rear defogger switch on

11 to 14 V

  • *: w/ Mirror Heater

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (w/ Mirror Heater)

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; WINDOW / GLASS: WINDOW DEFOGGER SYSTEM (for TMC Made): TERMINALS OF ECU

AIR CONDITIONING CONTROL ASSEMBLY (w/ Mirror Heater)

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; WINDOW / GLASS: WINDOW DEFOGGER SYSTEM (for TMC Made): TERMINALS OF ECU