- Transfer transaxle compensation code
- Perform reset memory*1
- CVT oil pressure calibration
- Perform road test to allow TCM to learn
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000028H9S |
| Model Year Start: 2023 | Model: Corolla Hatchback | Prod Date Range: [11/2022 - ] |
| Title: K120 / K121 (CVT): K120 TCM: REMOVAL; 2023 - 2025 MY Corolla Corolla Hatchback [11/2022 - ] | ||
REMOVAL
CAUTION / NOTICE / HINT
The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed, installed, or replaced during TCM removal/installation are shown below.
Necessary Procedure After Parts Removed/Installed/Replaced
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Replacement Part or Procedure |
Necessary Procedure |
Effect/Inoperative when not Performed |
Link |
|---|---|---|---|
| *1: Not necessary when TCM replaced with new one. | |||
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Replacement of TCM (If transaxle compensation code read from TCM) |
Update ECU security key |
Vehicle Control History (RoB) are stored |
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Replacement of TCM (If transaxle compensation code not read from TCM) |
Update ECU security key |
Vehicle Control History (RoB) are stored |
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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
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Effect/Inoperative Function when Necessary Procedure not Performed |
Necessary Procedure |
Link |
|---|---|---|
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Front Camera System |
Drive the vehicle straight ahead at 15 km/h (9 mph) or more for 1 second or more. |
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Learning completes when vehicle is operated normally
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Effect/Inoperative Function when Necessary Procedure not Performed |
Necessary Procedure |
Link |
|---|---|---|
| *1: for Hatchback | ||
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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
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: BEFORE DISCONNECTING BATTERY](/t3Portal/stylegraphics/info.gif)
2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
Click here
3. REMOVE NO. 1 ENGINE UNDER COVER ASSEMBLY
Click here
4. REMOVE REAR ENGINE UNDER COVER LH
Click here
5. REMOVE TCM
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(a) Remove the bolt to disconnect the engine wire from the No. 2 transmission control ECU bracket. |
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(b) Disengage the claw, rotate the lever and disconnect the TCM connector.
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Remove in this Direction |
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(c) Remove the 2 bolts and TCM from the continuously variable transaxle assembly. |
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6. REMOVE NO. 1 TRANSMISSION CONTROL ECU BRACKET
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(a) Remove the 2 screws and No. 1 transmission control ECU bracket from the TCM. |
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7. REMOVE NO. 2 TRANSMISSION CONTROL ECU BRACKET
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(a) Remove the 2 screws and No. 2 transmission control ECU bracket from the TCM. |
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