Electric Power Steering (EPS) Control Module Removal/Installation: Notes

WARNING:

The temperature of the steering gear (EPS motor) is high just after turning the steering mechanism from lock to lock repeatedly, and it may cause severe burns. Before performing the work, verify that the steering gear has cooled down.

CAUTION:

The EPS CM will not operate normally if the EPS configuration is not performed. If the EPS CM is replaced, always perform the EPS CM auto configuration so that the EPS operates normally.
If the EPS CM is dropped it could result in internal damage, therefore be careful not to drop it. If the EPS CM receives an impact, replace it.

NOTE:

The EPS CM prior to replacement stores the vehicle specification information.
A new EPS CM does not store any vehicle specification information.
When the ignition is switched ON (engine off or on) after the EPS CM is replaced, the EPS CM reads the vehicle specification information sent via CAN communication from the instrument cluster and stores it.

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION ).
Remove the front under cover. (See FRONT UNDER COVER REMOVAL/INSTALLATION ).
Disconnect the connectors shown in the figure.

Fig 1: Identifying EPS CM And Connectors
Courtesy of MAZDA MOTORS CORP.
Remove the EPS CM. (See EPS CM Installation Note ).

Fig 2: Removing EPS CM With Bolt
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.
If the EPS CM is replaced, perform the auto configuration using the following procedure.
1. Switch the ignition ON (engine off or on) and wait for 1 min or more.
2. Switch the ignition off and wait for 3 s or more.
3. Switch the ignition ON (engine off or on) and complete the EPS CM auto configuration.
4. Clear the DTC. (See CLEARING DTC [EPS CONTROL MODULE] ).
5. Switch the ignition off and wait for 3 s or more.
6. Switch the ignition ON (engine off or on) and wait for 1 min or more.
7. Using the M-MDS, verify that DTCs U2300:54/U2300:55/U2300:56 are not displayed.
  - If DTCs U2300:54/U2300:55/U2300:56 are displayed, go to the DTC troubleshooting procedure. (See DTC U2300:54/U2300:55/U2300:56 [EPS CONTROL MODULE] ).