Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000026ZJV |
Model Year Start: 2023 |
Model: Corolla Hatchback |
Prod Date Range: [09/2022 - 11/2022] |
Title: M20A-FKS (ENGINE CONTROL): ECM: REMOVAL; 2023 MY Corolla Corolla Hatchback [09/2022 - 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 ECM removal/installation are shown below.
Necessary Procedures After Parts Removed/Installed/Replaced
Replaced Part or Performed Procedure
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Necessary Procedure
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Effect/Inoperative Function when Necessary Procedure not Performed
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Link
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Replacement of ECM
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Vehicle Identification Number (VIN) registration
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MIL comes on
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Vehicle Control History (RoB) are stored
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ECU communication ID registration (Immobiliser system)
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Engine start function
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for TMC Made
for TMMMS Made
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-
Perform reset memory
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CVT oil pressure calibration
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Perform road test to allow TCM to learn
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-
Large shift shock
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Deterioration of fuel efficiency
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for K120 Initialization
for K120 Registration
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Replacement of ECM*1
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Code registration (Smart Key System (for Gasoline Model, Start Function))
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-
Wireless Door Lock Control System (for Gasoline Model with Smart Key System)
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Smart Key System (for Gasoline Model, Entry Function)
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Smart Key System (for Gasoline Model, Start Function)
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Steering lock function*3
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for TMC Made
for TMMMS Made
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Replacement of ECM*2
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Code registration (Immobiliser system)
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Engine start
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Telematics System
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NOTICE:
If the ECM has been struck or dropped, replace it.
HINT:
When the cable is disconnected / reconnected to the 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
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Necessary Procedure
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Link
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Front Camera System (for TMC Made)
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Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more.
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Pre-collision System (for TMMMS Made)
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Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 seconds or more.
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Lane Tracing Assist System (for TMMMS Made)
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Lane Departure Alert System (for TMMMS Made)
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Learning completes when vehicle is operated normally
Effect/Inoperative Function when Necessary Procedure not Performed
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Necessary Procedure
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Link
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Power Door Lock Control System
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Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch.
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PROCEDURE
1. PRECAUTION
NOTICE:
After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal.
Click here
2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
Click here
3. REMOVE RADIATOR SUPPORT OPENING COVER
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for Hatchback except GR
Click here
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for Sedan with Illumination
Click here
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for Sedan without Illumination
Click here
4. REMOVE INLET NO. 1 AIR CLEANER
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for TMC Made
Click here
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except TMC Made
Click here
5. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE
Click here
6. REMOVE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
Click here
7. REMOVE AIR CLEANER CASE SUB-ASSEMBLY
(b) Disengage the guide to remove the air cleaner case sub-assembly.
8. REMOVE ECM
(a) Disengage the claw and 2 guides to remove the No. 1 relay block cover from the No. 1 engine room relay block and No. 1 junction block assembly.
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(b) Disconnect the 3 connectors from the No. 1 engine room relay block and No. 1 junction block assembly.
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(c) Disengage the 2 claws to separate the engine wire from the No. 1 engine room relay block and No. 1 junction block assembly.
(d) Raise the 2 lock levers while pushing the locks on the levers, and disconnect the 2 ECM connectors.
NOTICE:
After disconnecting the ECM connectors, make sure that dirt, water or other foreign matter does not contact the connecting parts of the ECM connectors.
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(e) Remove the bolt and disengage the wire harness clamp to separate the engine wire.
(f) Remove the grommet.
(g) Remove the bolt and nut.
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(h) Disengage the guide to remove the ECM.
NOTICE:
If the ECM has been struck or dropped, replace it.
9. REMOVE NO. 2 ECM BRACKET
(a) Remove the 2 screws and No. 2 ECM bracket from the ECM.
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10. REMOVE NO. 1 ECM BRACKET
(a) Remove the 2 screws and No. 1 ECM bracket from the ECM.
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