DSC hydro-electronic control unit (Mazda CX-5KE)

Removal and installation of the hydroelectronic control unit

Attention.

• If the configuration of the electronic control unit is not completed, the vehicle may be involved in a traffic accident due to incorrect operation of the system. If the electronic control unit of the DSC is replaced with a new one, it is necessary to use the automatic configuration function to create the correct operating state of the dynamic stability system.
• If the initialization procedure of the dynamic stabilization system sensors is not completed, the system will not operate properly and may cause a traffic accident. After replacing or removing the hydroelectronic control unit, it is necessary to perform the initialization procedure of the dynamic stabilization system sensors to ensure proper operation of the system.
• If the electronic control unit falls from a height, its internal parts may be damaged. Be careful not to drop the electronic control unit. Replace the electronic control unit that has been hit or dropped with a new one.

Note:

• When the ignition is switched on or the engine is started after replacing the electronic control unit for the dynamic stabilization system, the system control unit reads data from the instrument cluster via the CAN bus to perform automatic configuration.
• The electronic control unit of the dynamic stabilization system stores specific vehicle information that must be recorded using a diagnostic tool before replacing the unit.
• The new hydroelectronic control unit for the dynamic stabilization system does not contain any information.

1. Remove the decorative engine cover.



2. Disconnect the engine control unit connector (from the front of the car) and remove the wiring bracket from engine mounting support No.3. Move the engine control unit wiring to the side.

3. Remove the bracket.



4. Pull the locking lever down in the direction of the arrow in the figure, pressing the connector cover plate.



5. Pull the connector towards the rear of the vehicle to remove it.

6. Apply installation marks to the brake lines and the hydraulic electronic control unit.



7. Wrap the connectors with electrical tape to prevent brake fluid from getting into them.



8. Disconnect the brake lines.

9. Loosen the bracket mounting bolts and nuts and remove the hydraulic electronic control unit together with the bracket.

10. Loosen the mounting bolts and remove the hydraulic electronic unit from the bracket.

11. Installation is carried out in the reverse order of removal, taking into account the following:

Install the brake lines onto the hydraulic electronic unit, aligning the installation marks made before removal.



Tighten the brake pipes to the specified tightening torque using a special wrench for flange union nuts.

Connect the connector and pull the locking lever up in the direction of the arrow in the figure.



After connecting the connector, make sure that its cover is fully pressed.



12. After installation, add brake fluid to the reservoir, remove air from the brake system and check the brake fluid level in the reservoir again.

13. Perform the following procedure to perform automatic configuration of the DSC electronic control unit:

• Turn on the ignition (engine off) and wait at least 10 seconds.
• Turn off the ignition and wait at least 3 seconds.
• Turn on the ignition (engine off) and wait at least 3 seconds.
• The automatic configuration procedure is complete.

14. Perform the initialization procedure for the dynamic stabilization system sensors (see the relevant section below).

15. Perform the tire pressure monitoring system initialization procedure (see chapter "Suspension").

16. Delete fault codes from the vehicle's memory.

Checking the DSC hydroelectronic control unit

1. Disconnect the DSC electronic control unit connector.

2. Connect the negative terminal of the battery.

3. Connect the tester terminal to the wiring side of the electronic control unit connector and check the voltage, continuity or resistance according to the table below.





Text taken from an online platform Mazbook.ru