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STEERING
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B. ELECTRICAL TROUBLESHOOTING
Concern
Cause
Remedy
Lack of Support
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
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. WSS?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 mis-communication
Note :
CAN signal / cluster RPM for
CEPS. Error code (DTC) may
generated related to CEPS)
Need to replace problem making part . Not
CEPS .