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Electronic Power Steering ( E PS ) Fault Diagnosis and Solution
Steering without assistance
Power assist doesn't
weigh the same for left
and right
When system is 'ON',
the steering swings to
both sides
Steering becomes heavy
System has noise
Vehicle Issue Diagnosis
1. Wire connectors have bad contact or are
disconnected
2. The fuse blew out
3. Relay damage
4. The controller, motor, or sensor is damaged
1. The median output voltage has deviation
2. Controller, motor or sensor is damaged
1. Motor is mounted backwards
2. Controller or sensor is damaged
1. Battery has power loss
2. Air pressure of the tires ( f ront ) is insufficient
3. Motor damage ( p ower reduction )
1. Motor damage
2. Gap of lower steering shaft assembly or
mechanical steering assembly is too large
3. Installation of lower steering shaft assembly
or mechanical steering assembly is loose
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1. Check whether wire connectors
and pins are fully inserted
2. Replace the fuse ( 4 0A )
3. Contact your dealer
4. Contact your dealer
1. Contact your dealer
2. Contact your dealer
1. Contact your dealer
2. Contact your dealer
1. Charge the battery
2. Inflate the tires
3. Contact your dealer
1. Contact your dealer
2. Contact your dealer
3. Contact your dealer
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