Work Procedure

DESCRIPTION 

When replacing the EPS control unit, the procedures of BEFORE REPLACEMENT and AFTER REPLACEMENT must be performed. For work procedure, refer to the following:

• Before EPS control unit replacement.
• After EPS control unit replacement.

BEFORE REPLACEMENT 

When replacing the EPS control unit, save "Operation log".

AFTER REPLACEMENT 

After replacing the EPS control unit, the following items must be performed:

• EPS control unit programming
• Adjust the neutral position of chassis control module (with built in steering angle sensor) (With automatic brake hold) or steering angle sensor (Without automatic brake hold).

WORK PROCEDURE (BEFORE REPLACING EPS CONTROL UNIT) 

1. SAVE "OPERATION LOG" 
   1. CONSULT Save "Operation Log", according to the procedure of "Programming" in Operation Manual.
      NOTE: EPS control unit part number is saved in "Operating Log" saved.

   >>

   • Replace the EPS control unit. Refer to EPS CONTROL UNIT : Removal and Installation .
   • After replacing the EPS control unit, perform necessary work.

WORK PROCEDURE (AFTER REPLACING EPS CONTROL UNIT) 

1. CHECK "OPERATION LOG" 
   1. CONSULT Check "Operation Log" saved before replacing the EPS control unit, according to the procedure of "Programming" in Operation Manual.
      NOTE: For the vehicle that the programming is to be performed, check if "Operation Log" of Vehicle Identification Number (VIN) is in Saved Data List.

   Is there an applicable Operation Log in the Saved Data List?

   YES>>

   GO TO 2.

   NO>>

   GO TO 3.

2. PERFORM EPS CONTROL UNIT PROGRAMMING 
   1. CONSULT Perform EPS control unit programming, according to "Programming" of Operation Manual. Refer to Operation Manual.
      CAUTION:

      During programming, maintain the following conditions:

      • Ignition switch: ON
      • Electric load: OFF
      • Steering wheel: Not steering
      • Battery voltage: 12 - 13.5 V (Check the value displayed on the screen.)
      • Vehicle speed: 0 km/h

   >>

   GO TO 5.

3. READ IN EPS CONTROL UNIT PART NUMBER BY "FAST LINKED" 
   1. CONSULT: Obtain EPS control unit part number by NISSAN PARTS CATALOG GLOBAL Web-FAST, according to the procedure of 'FAST linked' in Operation Manual. Refer to Operation Manual.
      CAUTION:

      Be sure to select "FAST linked".

      NOTE: "FAST linked" allows an appropriate programming by obtaining ECU part number from NISSAN PARTS CATALOG GLOBAL Web-FAST even when the part number cannot be obtained from the old ECU used before replacing with a new one.

   >>

   GO TO 4.

4. PERFORM PROGRAMMING (FAST LINKED) 
   1. CONSULT Perform EPS control unit programming according to the procedure of FAST linked in Operation Manual. Refer to Operation Manual.
      CAUTION:

      During programming, maintain the following conditions:

      • Ignition switch: ON
      • Electric load: OFF
      • Steering wheel: Not steering
      • Battery voltage: 12 - 13.5 V (Check the value displayed on the screen.)
      • Vehicle speed: 0 km/h

   >>

   GO TO 5.

5. PERFORM NECESSARY WORK 
   1. CONSULT
      1. Perform adjustment of chassis control module (with built in steering angle sensor) (With automatic brake hold) or steering angle sensor (Without automatic brake hold) neutral position. Refer to Work Procedure .
      2. Select "Self Diagnostic Result" mode of "EPS/DAST 3".
      3. Erase the memory of self-diagnosis results.

   >>

   End of work.