NANO

ELECTRICAL 14 2.4.6 ECU AND STEERING COLUMN PAIRING PROCESS NOTE:  While doing ECU and steering column pairing procedure, Please follow the instruction displaying on Diagnostics tool window.  If ECU and steering column pairing procedure is not completed, then EPAS warning lamp will glow in IPC and log a DTC in EPAS ECU.  If ECU is in spare mode (after Replacement) , it will show a DTC C131C-54 Motor calibration comparison Missing - Missing Calibration using a diagnostics tool and lamp will also glow and no assistance. Step Description Remarks 1 Remove ECU/ Column for service (Replacement) Refer WM Column/ ECU removal/ Fitment Procedure 2 Connect the diagnostics unit to the OBD connector correctly. Ensure Ignition is in "OFF" condition. 3 Ensure the vehicle is in straight ahead position. 4 Switch ON the Ignition Key , Don’t crank the Engine. 5 Ensure that the following pre-conditions are meet before performing steering angle calibration: a) 9 V < Battery voltage < 16 V b) Vehicle speed = 0 c) Engine is not in running condition. 6 Start the Steering Column replacement routine Follow the instruction which will be showed on Diagnostics tool. 7 Technician Read the Calibration data from Steering column label 8 Write these Calibration data into Diagnostic tool window. 9 Start the Spare part verification routine (Paring Verification Process) using diagnostics tool . 10 Turn the steering wheel lock to lock condition and bring front wheels back to the straight ahead position. ( this process should be performed in IGN on condition no assistance will be available , don’t crank the Engine ) 11 Stop Spare part verification routine (Paring Verification Process) using diagnostics tool . 12 Configure the EOL parameter inside the ECU as per vehicle configuration using diagnostic tool :- a) Write VIN number b) Write Tyre size c) Write Rack length d) Flash the calibration file - Using Re-Programming Tool 13 Perform the Steering Angle Calibration And Initialization Process as per defined procedure. Follow the instruction which will be showed on tool (Refer Steering angle Calibration Procedure). 14 Read DTC and Clear DTC Using Diagnostic tool. 15 EPAS Column/ ECU Paring Procedure Completed