Dtc "C1141", "C1142", "C1143", "C1145" Eps Motor Circuit Malfunction (Lt-A750Xp/Zk9) - Suzuki kq750 Service Manual

DTC "C1141", "C1142", "C1143", "C1145" EPS Motor Circuit Malfunction (LT-A750XP/ZK9)

• Faulty EPS motor circuit.
• Faulty EPS motor.
• EPS control unit malfunction.
Troubleshooting
Step
1 1) Turn the ignition switch OFF.
2) Check the EPS motor coupler for loose or poor contact.
If OK, measure the EPS motor voltage.
3) Insert the needle-point probes to lead wire coupler.
4) Start the engine and turn the handlebars left turn.
5) Measure the voltage between R wire "A" and B wire "B".
Special tool
(A): 09900–25008 (Multi circuit tester set)
(B): 09900–25009 (Needle-point probe set)
Tester knob indication
Voltage ( )
EPS motor voltage
Approx. 7.0 V
Is voltage OK?
Possible Cause
Action
I931G3630036-01
I931H1630093-01
(A)
(B)
I931G3630037-01
Power Assisted Steering System:
Yes
Go to step 2.
6C-44
B931G46304014
No
R wire or B wire open or
R wire shorted to
ground.