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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.
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Troubleshooting
