- Wireless Door Lock Control System
- Smart Key System (for Gasoline Model, Entry Function)
- Smart Key System (for Gasoline Model, Start Function)
- Steering lock function*
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000028IR0 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - ] |
| Title: POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ] | ||
REMOVAL
CAUTION / NOTICE / HINT
The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during main body ECU (multiplex network body ECU) removal/installation are shown below.
Necessary Procedure After Parts Removed/Installed/Replaced (for Gasoline Model)
|
Replaced Part or Performed Procedure |
Necessary Procedure |
Effect/Inoperative Function when Necessary Procedure not Performed |
Link |
|---|---|---|---|
| *: w/ Smart Key System | |||
|
Main body ECU (multiplex network body ECU) |
ECU configuration |
- |
|
|
Code registration |
|
|
|
|
Power distribution box assembly |
ECU configuration |
- |
|
NOTICE:
- After the ignition switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the ignition switch off, make sure to wait at least 3 minutes before disconnecting the cable from the negative (-) auxiliary battery terminal.
- When the cable is disconnected from the negative (-) auxiliary battery terminal and the security lock setting has been enabled, multi-display operations will be disabled upon next startup unless the password is entered. Be sure to check the security lock setting before disconnecting the cable from the negative (-) auxiliary battery terminal. (for Audio and Visual System (for Single Knob Type))
HINT:
When the cable is disconnected / reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.
Learning completes when vehicle is driven
|
Effect/Inoperative Function when Necessary Procedure not Performed |
Necessary Procedure |
Link |
|---|---|---|
|
*1: for GR Model
*2: except GR Model |
||
|
Front Camera System |
|
|
Learning completes when vehicle is operated normally
|
Effect/Inoperative Function when Necessary Procedure not Performed |
Necessary Procedure |
Link |
|---|---|---|
| *1: for Hatchback | ||
|
Power Door Lock Control System
|
Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch. |
|
Necessary Procedure After Parts Removed/Installed/Replaced (for HV Model)
|
Replaced Part or Performed Procedure |
Necessary Procedure |
Effect/Inoperative Function When Necessary Procedures are not Performed |
Link |
|---|---|---|---|
|
Main body ECU (Multiplex network body ECU) |
ECU configuration |
- |
|
|
Code registration (Smart Key System (for Start Function, HV Model)) |
|
|
|
|
Power distribution box assembly |
ECU configuration |
- |
|
NOTICE:
- After the ignition switch is turned off, the radio and display receiver assembly records various types of memory and settings. As a result, after turning the ignition switch off, make sure to wait at least 3 minutes before disconnecting the cable from the negative (-) auxiliary battery terminal.
- When the cable is disconnected from the negative (-) auxiliary battery terminal and the security lock setting has been enabled, multi-display operations will be disabled upon next startup unless the password is entered. Be sure to check the security lock setting before disconnecting the cable from the negative (-) auxiliary battery terminal. (for Audio and Visual System (for Single Knob Type))
HINT:
When the cable is disconnected / reconnected to the auxiliary battery terminal, systems temporarily stop operating. However, each system has a function that completes learning the first time the system is used.
Learning completes when vehicle is driven
|
Effect/Inoperative Function when Necessary Procedure not Performed |
Necessary Procedure |
Link |
|---|---|---|
|
Front Camera System |
Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more. |
|
PROCEDURE
1. PRECAUTION
NOTICE:
After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
2. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL
for M20A-FKS: Click here
![2023 - 2025 MY Corolla Corolla Hatchback [11/2022 - ]; MAINTENANCE: M20A-FKS BATTERY: REMOVAL+](/t3Portal/stylegraphics/info.gif)
for 2ZR-FXE: Click here
for G16E-GTS: Click here
3. REMOVE FRONT DOOR SCUFF PLATE LH
Click here
4. REMOVE COWL SIDE TRIM SUB-ASSEMBLY LH
Click here
5. DISCONNECT FRONT DOOR OPENING TRIM WEATHERSTRIP LH
Click here
6. REMOVE NO. 1 INSTRUMENT SIDE PANEL
Click here
7. REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY
Click here
8. DISCONNECT HOOD LOCK CONTROL LEVER SUB-ASSEMBLY
Click here
9. REMOVE LOWER INSTRUMENT PANEL FINISH PANEL
Click here
10. REMOVE NO. 3 INSTRUMENT PANEL TO COWL BRACE SUB-ASSEMBLY
(a) Remove the 2 bolts, nut and No. 3 instrument panel to cowl brace sub-assembly.
|
Bolt |
|
Nut |
11. REMOVE POWER DISTRIBUTION BOX ASSEMBLY WITH MAIN BODY ECU
|
(a) Disconnect each connector. |
|
(b) Disengage the clamp.
(c) Disengage the 2 claws and pull down the 2 lock levers to disconnect the 2 connectors as shown in the illustration.
|
Remove in this Direction |
(d) Remove the bolt and nut.
|
*A |
for CVT |
|
*B |
for Manual Transaxle |
|
|
Bolt |
|
|
Nut |
(e) Disengage the clamp.
|
(f) Disengage the clamp. |
|
|
(g) Disengage the clamp. |
|
(h) Disengage the 2 claws and raise the 2 lock levers to disconnect the 2 connectors as shown in the illustration and remove the power distribution box assembly with main body ECU.
|
|
Remove in this Direction |
12. REMOVE NO. 3 WIRING HARNESS CLAMP BRACKET
|
(a) Remove the bolt. |
|
(b) Disengage the guide to remove the No. 3 wiring harness clamp bracket.
13. REMOVE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
(a) Press the claw of the power distribution box assembly as shown in the illustration to release the lock.
|
*1 |
Power Distribution Box Assembly |
|
*2 |
Main Body ECU (Multiplex Network Body ECU) |
|
|
Press in this Direction |
(b) With the power distribution box assembly lock released, insert a screwdriver with its tip wrapped with protective tape horizontally between the main body ECU (multiplex network body ECU) and power distribution box assembly.
|
*a |
Protective Tape |
|
|
Insert in this Direction |
|
|
Remove in this Direction |
NOTICE:
- Use a screwdriver with a diameter between 5.0 mm (0.197 in.) and 6.3 mm (0.248 in.) and a length of approximately 90 mm (3.54 in.).
- Do not insert the screwdriver under the connector socket of the main body ECU (multiplex network body ECU).
(c) Using the screwdriver, carefully raise the main body ECU (multiplex network body ECU) to the position where the connector becomes disconnected.
NOTICE:
Do not twist the screwdriver to raise the main body ECU (multiplex network body ECU).
(d) Raise the main body ECU (multiplex network body ECU) as shown by the arrow (1), and then pull it out as shown by the arrow (2) in the illustration.
|
|
Raise in this Direction (1) |
|
Remove in this Direction (2) |
NOTICE:
Do not touch the main body ECU (multiplex network body ECU) connector.
|
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