Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001HAMK
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 - 03/2019]
Title: DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/o Smart Key System): TERMINALS OF ECU; 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

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

HINT:

Measure the values on the wire harness side with the connectors connected.

Terminal No. (Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

Related Data List Item

I86-19 (GND2) - Body ground

W-B - Body ground

-

Ground

Always

Below 1 Ω

-

(c) Reconnect the instrument panel junction block assembly connectors.

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

HINT:

Measure the values on the wire harness side with the connectors connected.

Terminal No. (Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

Related Data List Item

MB-11 (GND1) - Body ground

-

-

Ground

Always

Below 1 Ω

-

MB-30 (ACC) - Body ground

-

Input

ACC power supply

Ignition switch ACC

11 to 14 V

ACC SW

Ignition switch off

Below 1 V

MB-31 (BECU) - Body ground

-

Input

Battery power supply

Always

11 to 14 V

-

MB-32 (IG) - Body ground

-

Input

IG power supply

Ignition switch ON

11 to 14 V

IG SW

Ignition switch off

Below 1 V

(e) Install the main body ECU (multiplex network body ECU) to instrument panel junction block assembly.

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; POWER DISTRIBUTION: MAIN BODY ECU: INSTALLATION

(f) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

Related Data List Item

4B-29 (BZR) - Body ground

R - Body ground

Output

Wireless door lock buzzer output

Active Test Wireless Buzzer is OFF

Below 1 V

-

Active Test Wireless Buzzer is ON

Pulse generation

I84-11 (PRG) - Body ground

GR - Body ground

Output

Output to door control and tire pressure monitoring system receiver assembly

Key inserted into ignition key cylinder → Key pulled out of ignition key cylinder

11 to 14 V → Pulse generation → 11 to 14 V

-

I84-10 (RDA) - Body ground

P - Body ground

Input

Input from door control and tire pressure monitoring system receiver assembly

Procedure:

  1. Remove key from ignition key cylinder
  2. Close all doors
  3. Press lock or unlock switch of door control transmitter assembly

11 to 14 V → Pulse generation

-