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![NISSAN TIIDA 2007 Service Repair Manual EPS CONTROL UNIT
STC-23
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EPS HARNESS CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUES FOR EPS CONTROL UNIT
Data are reference values an NISSAN TIIDA 2007 Service Repair Manual EPS CONTROL UNIT
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EPS HARNESS CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUES FOR EPS CONTROL UNIT
Data are reference values an](/manual-img/5/57395/w960_57395-4896.png)
EPS CONTROL UNIT
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EPS HARNESS CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUES FOR EPS CONTROL UNIT
Data are reference values and are measured between each terminal and ground.
CAUTION:
When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.
SGIA1624E
Te r m i n a lWire
colorItem Condition Data (Approx.)
4 V Torque sensor sub Engine runningSteering wheel: Not steering
(There in no steering force)2.5 V
Steering wheel: Steering1.7 V – 3.3 V
(The value is changed accord-
ing to steering left or right)
5 BR Torque sensor power supplyIgnition switch: ON 8 V
Ignition switch: OFF 0 V
6 G Torque sensor main Engine runningSteering wheel: Not steering
(There is no steering force)2.5 V
Steering wheel: Steering1.7 V – 3.3 V
(The value is changed accord-
ing to steering left or right)
7 R Torque sensor ground Always 0 V
9 L CAN-H — —
10 O Power supplyIgnition switch: ON Battery voltage
Ignition switch: OFF 0 V
16 P CAN-L — —
17 R Power supply (Memory back-up)Ignition switch: ON Battery voltage
Ignition switch: OFF Battery voltage
18 B Ground Always 0 V
19 — Motor (+) — —
20 — Motor (–) — —
Page 4898 of 5883
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EPS CONTROL UNIT
Wiring Diagram - EPS -
INFOID:0000000001697720
ALGWA0004GB
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EPS CONTROL UNIT
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ALGIA0026GB
Page 4900 of 5883
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EPS CONTROL UNIT
ALGIA0027GB
Page 4901 of 5883
EPS CONTROL UNIT
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Fail-Safe FunctionINFOID:0000000001697717
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, enters a manual steering state. (Control turning force steering wheel
becomes heavy.)
ALGIA0028GB
Page 4902 of 5883
STC-28
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EPS CONTROL UNIT
DTC Index
INFOID:0000000001716730
DTC Items (CONSULT screen terms) Reference
C1601 BATTERY POWER SUPPLYSTC-9
C1604 TORQUE SENSORSTC-11
C1606 EPS MOTORSTC-13
C1607 EEPROMSTC-15
C1608 EPS CONTROL UNITSTC-16
C1609 CAN VHCL SPEEDSTC-17
C1610 CAN ENG RPMSTC-19
U1000 CAN COMM CIRCUITSTC-21
Page 4903 of 5883
![NISSAN TIIDA 2007 Service Repair Manual EPS SYSTEM SYMPTOMS
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SYMPTOM DIAGNOSIS
EPS SYSTEM SYMPTOMS
Symptom ChartINFOID:0000000001716771
If EPS warning lamp turns ON, perform NISSAN TIIDA 2007 Service Repair Manual EPS SYSTEM SYMPTOMS
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SYMPTOM DIAGNOSIS
EPS SYSTEM SYMPTOMS
Symptom ChartINFOID:0000000001716771
If EPS warning lamp turns ON, perform](/manual-img/5/57395/w960_57395-4902.png)
EPS SYSTEM SYMPTOMS
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SYMPTOM DIAGNOSIS
EPS SYSTEM SYMPTOMS
Symptom ChartINFOID:0000000001716771
If EPS warning lamp turns ON, perform self-diagnosis. Refer to STC-7, "CONSULT-III Function (EPS)".
Symptom Condition Check item Reference page
EPS warning lamp does not turn ON when ig-
nition switch to “ON”.
(EPS warning lamp check)Ignition switch: ONCAN communication line
STC-30
Combination meter
EPS warning lamp does not turn OFF for sev-
eral seconds after starting the engineEngine runningCAN communication line
STC-31
Power supply and ground for
EPS control unit
Torque sensor
EPS motor
Vehicle speed signal
Engine status signal
Combination meter
Steering wheel turning force is heavy or light,
while driving While driving
Steering wheel turningCAN communication line
STC-33
Vehicle speed signal
Engine status signal
EPS motor
Steering wheel turning force
(Mechanical malfunction)
Unbalance steering wheel turning force and
return between right and left, while driving While driving
Steering wheel turningWheel alignment
STC-34
Steering wheel turning force
(Mechanical malfunction)
Unbalance steering wheel turning force,
while driving (Torque variation) While driving
Steering wheel turningSteering column intermediate
shaft installation condition
STC-35
Steering wheel turning force
(Mechanical malfunction)
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EPS WARNING LAMP DOES NOT TURN ON
EPS WARNING LAMP DOES NOT TURN ON
Diagnosis ProcedureINFOID:0000000001697733
SYMPTOM:
EPS warning lamp does not turn ON when ignition switch to “ON”.
DIAGNOSTIC PROCEDURE
1.CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to STC-7, "
CONSULT-III Function (EPS)" .
Is the
“CAN COMM CIRCUIT [U1000]” displayed?
YES >> Perform trouble diagnosis for CAN communication line. Refer to STC-21, "Diagnosis Procedure" .
NO >> GO TO 2.
2.CHECK EPS CONTROL UNIT
Check EPS control unit input/output signal. Refer to STC-22, "
EPS Control Unit Input/Output Signal Reference
Va l u e" .
OK or NG
OK >> GO TO 3.
NG >> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
3.SYMPTOM CHECK
Check again.
OK or NG
OK >>INSPECTION END
NG >> Replace combination meter. Refer to MWI-94, "
Removal and Installation".