626 / 1006
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