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B. ELECTRICAL TROUBLESHOOTING
Concern
Cause
Remedy
Steering jam or
hard, Steering
motor jam
Steering column failure
1.Read error memory with diagnostic tool.
2.Remedy failure or replace steering
column
3.Read DTC with Diagnostic tool
Cable splice on steering column
vehicle wiring harness defective or not
plugged in correctly
1.Check cable splice / plug in correctly
2. If cable splice damaged, replace
3. vehicle wiring harness or steering
column
4.Read DTC with Diagnostic tool
Vehicle power supply at power
connector insufficient
1.Check vehicle power supply at power
connector between the pins
2.Nominal value: greater than 9 V
3.Check fuse/wiring harness in vehicle or
replace it
4.Read DTC with Diagnostic tool
Vehicle power supply insufficient at
vehicle signal connector
1.Check vehicle power supply between
pins on terminal 15 and ground/earth
2.Nominal value: greater than 9 V
3.Check fuse/wiring harness in vehicle or
replace it
4.Read DTC with Diagnostic tool
Faulty CAN bus signal in vehicle
signal connector
1.Check differential voltage between
CANL and CANH
2.Nominal value: 0.1...1.0 V (value
fluctuates)
3.Check terminating resistor between
CANL and CANH
4.Nominal value: approx. 60
5.Physical check of the CAN bus.
6.Read DTC with Diagnostic tool
C. MECHANICAL TROUBLESHOOTING
Concern
Cause
Remedy
Noises in the
steering column or
steering gear
Mechanical error/damage in the
steering column/steering gear
1.Replace steering column/steering gear
No precise straight-
ahead driving
possible
Play in steering column (line)
1.Check play in steering column (line)
2.Replace defective parts
Play in steering gear
1.Check play in steering gear
2.Replace defective parts
Steering system Geometry adjusted
1.Set steering system kinematics
2.correctly
Control unit not calibrated
1.Perform calibration