Toyota Yaris: Ecm / Removal
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 Procedure After Parts Removed/Installed/Replaced| Replacement Part or Procedure | Necessary Procedures | Effects/Inoperative when not performed | Link |
|---|---|---|---|
| *1: When the ECM is replaced with a new one, reset memory is unnecessary. | |||
| Replacement of ECM | Perform Vehicle Identification Number (VIN) or frame number registration |
|
|
| ECU security key | Vehicle control history (RoB) are stored |
| |
| ECU configuration | - |
| |
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 Procedures are not Performed
Necessary Procedures
Link
Lane tracing assist system
Drive the vehicle straight ahead at 35 km/h (22 mph) or more for 5 second or more.
Pre-collision system
Stop and start system
Drive the vehicle until stop and start control is permitted (approximately 5 to 60 minutes)
-
Learning completes when vehicle is operated normally
Effect/Inoperative Function When Necessary Procedures are not Performed
Necessary Procedures
Link
Power door lock control system
- Back door opener
Perform door unlock operation with door control switch or electrical key transmitter sub-assembly switch.
Air conditioning system
After the ignition switch is turned to ON, the servo motor standard position is recognized.
-
PROCEDURE
1. PRECAUTION
NOTICE:
-
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal.
Click here
-
Perform the Vehicle Identification Number (VIN) registration when replacing the ECM.
Click here
2. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL
Click here
3. REMOVE NO. 1 AIR CLEANER INLET
Click here
4. SEPARATE NO. 1 AIR CLEANER HOSE
Click here
5. REMOVE AIR CLEANER CASE SUB-ASSEMBLY
Click here
6. REMOVE ECM
| (a) Disengage the clamps. |
|
(b) Raise the 3 lock levers while pushing the locks on the levers, and disconnect the 3 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.
| (c) Remove the bolt, nut and ECM. NOTICE: If the ECM has been struck or dropped, replace it. |
|
7. REMOVE NO. 1 ECM BRACKET
| (a) Remove the screw and No. 1 ECM bracket from the ECM. |
|
8. REMOVE NO. 2 ECM BRACKET
| (a) Remove the 2 screws and No. 2 ECM bracket from the ECM. |
|
Components
COMPONENTS ILLUSTRATION
*1 NO. 1 AIR CLEANER INLET *2 NO. 1 AIR CLEANER HOSE *3 AIR CLEANER CASE SUB-ASSEMBLY *4 ECM *5 NO. 1 ECM BRACKET *6 NO...
Installation
INSTALLATION CAUTION / NOTICE / HINT NOTICE: After performing the ECU configuration procedure and update ECU security key procedure, make sure to perform the initialization procedure for when the cable has been disconnected and reconnected to the negative (-) auxiliary battery terminal...
Other information:
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Toyota Yaris XP210 (2020-2025) Reapir and Service Manual: Reassembly
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Key Suspend Function
If a key is left in the vehicle, the functions of the key left in the vehicle are temporarily suspended to prevent theft of the vehicle.
To restore the functions, press the unlock button on the functions-suspended key in the vehicle.
