Self-Diagnostic Function Table (Eps System) - Yamaha Apex RX10PA 2011 Supplementary Service Manual

EPS (ELECTRIC POWER STEERING) SYSTEM

SELF-DIAGNOSTIC FUNCTION TABLE (EPS SYSTEM)

Fault
Item
code No.
11
13
EPS torque sensor
15
16
21 Speed sensor
22 Engine speed signal
41
42
EPS motor
43
45
52 EPS control unit
53 EPS control unit
54 EPS control unit
55 EPS control unit
Symptom
No normal signals are received from
the torque sensor.
No normal signals are received from
the speed sensor.
No normal signals are received from
the ECU.
No normal signals are received from
the EPS motor.
Relay contacts in the EPS control unit
are welded together.
Battery voltage has dropped.
Relay contacts in the EPS control unit
are shorted or open.
Battery voltage has increased.
Abnormality exists between the EPS
and the ECU.
125
ELEC
Probable cause of malfunction
• Open or short circuit in wire harness.
• Malfunction in torque sensor.
• Malfunction in EPS control unit.
• Open or short circuit in wire harness.
• Malfunction in speed sensor.
• Malfunction in EPS control unit.
• Open or short circuit in wire harness.
• Malfunction in ECU.
• Malfunction in EPS control unit.
• Open or short circuit in wire harness.
• Malfunction in EPS motor.
• Malfunction in EPS control unit.
• Malfunction in EPS control unit.
• Faulty battery.
• Malfunction in the charging system.
Refer to "CHARGING SYSTEM".
• Malfunction in EPS control unit.
• Malfunction in EPS control unit.
• Malfunction in the charging system.
Refer to "CHARGING SYSTEM".
• Malfunction in EPS control unit.