MECHANICAL TROUBLESHOOTING • CONCERN CAUSE REMEDY 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 Nominal value: approx. 60 4. 5. Physical check of the CAN bus. 6. Read DTC with Diagnostic tool Over Heat Protection (OHP) When a driver turns steering LH/RH side continuously (more than 10times) or lock position for more 30 sec, CEPS will get over heated & CEPS power will cut off to avoid over heat damage of CEPS parts like motor / ECU /Sensor Note : It common phenomenon of CEPS, no part need to replace part. (Warning light will not ON) Vehicle ignition off for 3min , then drive. Steering will cool down . Work perfectly. Wheel / vehicle peed sensor mal- function 1. WSS /VSS Sensor need to replace. 2. 2WSS?VSS cable faulty need to check. Note : Wheel /Vehicle speed or input for CEPS. Error code (DTC) may generated related to CEPS. Need to replace problem making part . Not CEPS . CAN Communication / Cluster malfunction 1. Main ECU communication issue 2. Cluster RPM miscommunication Note : CAN signal / cluster RPM for CEPS. Error code (DTC) may generated related to CEPS) Need to replace problem making part . Not CEPS . 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 STEERING 34
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