Attention.
- There are two types of ECU firmware. If the wrong ECU firmware is installed, the operation of the ECU components may not be consistent.
- When replacing the engine control unit, make sure that the first four characters of the part number indicated on the control unit sticker on the new and replaced units match.
Without mounting bolts
1. Disconnect the negative battery terminal.
2. Remove the engine control unit cover.
3. Disconnect the engine control unit connector.
4. Remove the electronic engine control unit assembly from the battery shelf.
5. Remove the engine control unit from the bracket.
6. Installation is carried out in the reverse order of removal.
7. If the electronic engine control unit is replaced, it is necessary to configure it and program the system-related components.
Note: If configuration is not performed by reading/writing vehicle specific information, perform configuration using built-in information after replacing the control unit.
With mounting bolts
1. Disconnect the negative battery terminal.
2. Remove the engine control unit cover.
Note:
To remove the set bolt, proceed as follows:
- Use a chisel and hammer to create a groove in the head of the set screw to insert the screwdriver.
- Unscrew the mounting bolt using a screwdriver or pliers.
3. Disconnect the engine control unit connector.
4. Remove the electronic engine control unit from the battery shelf.
5. Remove the engine control unit from the bracket.
6. Installation is carried out in the reverse order of removal.
Note: Tighten the set bolts until the head shears off.
Note:
- Insert the edge of the engine control unit cover into area A shown in the figure.
- First, tighten and then fully tighten the two bolts.
Attention.
- Do not touch the terminals of the electronic control unit connector. The terminals of the connector are very thin and can be damaged by touching them
- If the ECU connector is installed at an angle and the locking lever moves, the connector will be damaged. Make sure the ECU connector is inserted straight. Move the locking lever of the connector until it clicks.
7. If the electronic engine control unit is replaced, it is necessary to configure it and program the system-related components.
Note: If configuration is not performed by reading/writing vehicle specific information, perform configuration using built-in information after replacing the control unit.