Nissan Versa Note. Instruction — part 765
EPS CONTROL UNIT
STC-9
< ECU DIAGNOSIS INFORMATION >
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TERMINAL LAYOUT
PHYSICAL VALUES
Fail-Safe
INFOID:0000000009667175
• If any malfunction occurs in the system and control unit detects the malfunction, EPS warning lamp on com-
bination meter turns ON to indicate system malfunction.
• When EPS warning lamp is ON, the system enters into a instruction steering state. (Steering wheel turning
force becomes heavy.)
• Under abnormal vehicle speed signal conditions, vehicle speed is judged as constant.
ALGIA0167ZZ
Terminal No.
(Wire Color)
Description
Condition
Value
(Approx.)
+
−
Signal name
Input/Output
1
(P)
—
CAN-L
Input/Output
—
—
2
(L)
—
CAN-H
Input/Output
—
—
4
(Y)
Ground
Ignition power supply
Input
Ignition switch: ON
Battery voltage
Ignition switch: OFF
0 V
13
(R)
Ground
Torque sensor power
supply
Output
Ignition switch: ON
5 V
Ignition switch: OFF
0 V
14
(Y)
Ground
Torque sensor sub
Input
Ignition switch: ON
Steering wheel: Not
steering (There is no
steering force)
2.5 V
Engine running
Steering wheel: steer-
ing
1.6 V – 3.4 V
(The value is changed
according to steering
left or right)
15
(B)
Ground
Torque sensor ground
Input
Always
0 V
16
(W)
Ground
Torque sensor main
Input
Ignition switch: ON
Steering wheel: Not
steering (There is no
steering force)
2.5 V
Engine running
Steering wheel: steer-
ing
1.6 V – 3.4 V
(The value is changed
according to steering
left or right)
17
(R)
Ground
Battery power supply
Input
Always
Battery voltage
18
(B)
Ground
Ground
—
Always
0 V
19
(
−)
—
Motor
—
—
—
20
(B)
—
Motor
—
—
—
STC-10
< ECU DIAGNOSIS INFORMATION >
EPS CONTROL UNIT
Protection Function
INFOID:0000000009667176
EPS control unit decreases the output signal to EPS motor while extremely using the power steering function
(e.g., full steering) consecutively for protecting EPS motor and EPS control unit (Overload protection control).
While activating overload protection control, the assist torque gradually decreases, and the steering wheel
turning force becomes heavy. The normal assist torque reactivates by no steering.
DTC Inspection Priority Chart
INFOID:0000000009667177
When multiple DTCs are detected simultaneously, check one by one depending on the following priority list.
DTC Index
INFOID:0000000009667178
Priority
Priority order item (DTC)
1
U1000 CAN COMM CIRCUIT
2
C1609 CAN VHCL SPEED, C1610 CAN ENG RPM
3
C1601 BATTERY VOLT
4
Other than the above
DTC
Items (CONSULT screen terms)
Reference
C1601
BATTERY VOLT
C1604
TORQUE SENSOR
C1606
EPS MOTOR
C1607
EEPROM
C1608
CONTROL UNIT
C1609
CAN VHCL SPEED
C1610
CAN ENG RPM
U1000
CAN COMM CIRCUIT
EPS SYSTEM
STC-11
< WIRING DIAGRAM >
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WIRING DIAGRAM
EPS SYSTEM
Wiring Diagram
INFOID:0000000008969734
AAGWA0034GB
STC-12
< WIRING DIAGRAM >
EPS SYSTEM
AAGIA0069GB
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