2007 NISSAN TIIDA Service Repair Manual

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Page 4881 of 5883

NISSAN TIIDA 2007 Service Repair Manual DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
STC-7
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DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
CONSULT-III Function (EPS)INFOID:0000000001697722
FUNCTION
CO

DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
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DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
CONSULT-III Function (EPS)INFOID:0000000001697722
FUNCTION
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
SELF-DIAG RESULTS MODE
Display Item List
CAUTION:
If “CAN COMM CIRCUIT [U1000]” is displayed with other DTCs, first perform the trouble diagnosis for CAN communication
line.
How to Erase Self-Diagnostic Results
1. Perform applicable inspection of malfunctioning item and then repair or replace.
2. Turn ignition switch “OFF” to erase memory.
3. Turn ignition switch “ON” and select “SELF-DIAG RESULTS” mode with CONSULT-III.
4. Touch “ERASE” on CONSULT-III screen to erase DTC memory.
CAUTION:
If memory cannot be erased, perform diagnosis.
DATA MONITOR
Display Item List
EPS diagnostic mode Description
SELF-DIAG RESULTS Displays EPS self-diagnosis results.
DATA MONITOR Displays EPS input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER EPS control unit part number can be read.
Item
(CONSULT-III screen terms)Diagnostic item is detected when.... Check item
BATTERY VOLT
[C1601]When the power supply malfunction supplied to EPS control unit is
detected.STC-9
TORQUE SENSOR
[C1604]When the torque sensor malfunction assembled in steering column
assembly is detected. STC-11
EPS MOTOR
[C1606]When the motor driver malfunction of EPS control unit or EPS motor
malfunction is detected.STC-13
EEPROM
[C1607]When the memory (EEPROM) system malfunction is detected in
EPS control unit.STC-15
CONTROL UNIT
[C1608]When the internal malfunction is detected in EPS control unit.STC-16
CAN VHCL SPEED
[C1609]When the malfunction is detected in vehicle speed signal received
with CAN communication.STC-17
CAN ENG RPM
[C1610]When the malfunction is detected in engine status signal received
with CAN communication.STC-19
CAN COMM CIRCUIT
[U1000]When EPS control unit is not transmitting or receiving CAN commu-
nication signal 2 seconds or more.STC-21
NO DTC IS DETECTED.
FURTHER TESTING MAY BE RE-
QUIRED.No NG item has been detected. —

Page 4882 of 5883

NISSAN TIIDA 2007 Service Repair Manual STC-8
< FUNCTION DIAGNOSIS >[EPS]
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
EPS CONTROL UNIT PART NUMBER
Display a part number of EPS control unit carried by a vehicle.
Monitor item (Unit) Remarks
MOTOR VOL

Page 4883 of 5883

NISSAN TIIDA 2007 Service Repair Manual C1601 BATTERY POWER SUPPLY
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COMPONENT DIAGNOSIS
C1601 BATTERY POWER SUPPLY
DescriptionINFOID:0000000001716732
Power is supplied from

Page 4884 of 5883

NISSAN TIIDA 2007 Service Repair Manual STC-10
< COMPONENT DIAGNOSIS >[EPS]
C1601 BATTERY POWER SUPPLY
NG >> Check the following. If any items are damaged, repair or replace damaged parts.
60 A fusible link (letter m, located in the fuse

Page 4885 of 5883

NISSAN TIIDA 2007 Service Repair Manual C1604 TORQUE SENSOR
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C1604 TORQUE SENSOR
DescriptionINFOID:0000000001716736
Torque sensor detects the steering torque, and transmit

Page 4886 of 5883

NISSAN TIIDA 2007 Service Repair Manual STC-12
< COMPONENT DIAGNOSIS >[EPS]
C1604 TORQUE SENSOR
Also check harness for short to ground and short to power.
4. Connect EPS control unit harness connector and torque sensor harness connector.
OK

Page 4887 of 5883

NISSAN TIIDA 2007 Service Repair Manual C1606 EPS MOTOR
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C1606 EPS MOTOR
DescriptionINFOID:0000000001716739
EPS motor provides the assist torque by control signal from EPS

Page 4888 of 5883

NISSAN TIIDA 2007 Service Repair Manual STC-14
< COMPONENT DIAGNOSIS >[EPS]
C1606 EPS MOTOR
OK or NG
OK >> GO TO 4.
NG >> Check EPS control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged,

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