Nissan Tiida C11. Instruction — part 1221
DIAGNOSIS SYSTEM (EPS CONTROL UNIT)
STC-7
< FUNCTION DIAGNOSIS >
[EPS]
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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.
TORQUE SENSOR
[C1604]
When the torque sensor malfunction assembled in steering column
assembly is detected.
EPS MOTOR
[C1606]
When the motor driver malfunction of EPS control unit or EPS motor
malfunction is detected.
EEPROM
[C1607]
When the memory (EEPROM) system malfunction is detected in
EPS control unit.
CONTROL UNIT
[C1608]
When the internal malfunction is detected in EPS control unit.
CAN VHCL SPEED
[C1609]
When the malfunction is detected in vehicle speed signal received
with CAN communication.
CAN ENG RPM
[C1610]
When the malfunction is detected in engine status signal received
with CAN communication.
CAN COMM CIRCUIT
[U1000]
When EPS control unit is not transmitting or receiving CAN commu-
nication signal 2 seconds or more.
NO DTC IS DETECTED.
FURTHER TESTING MAY BE RE-
QUIRED.
No NG item has been detected.
—
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 (V)
Power supply voltage for EPS control unit is displayed
TORQUE SENSOR (Nm)
Steering wheel turning force detected by torque sensor is displayed
MOTOR SIG (A)
Current commanded value to EPS motor is displayed
MOTOR CURRENT (A)
Current value consumed by EPS motor is displayed
VEHICLE SPEED (km/h) or (mph)
Vehicle speed is displayed from vehicle speed signal with CAN communication
WARNING LAMP (ON/OFF)
EPS warning lamp control status is displayed
DERATING STAT (ON/OFF)
Protect overload status is displayed
ENGINE STATUS (STOP/RUN)
Engine speed is displayed from engine status signal with CAN communication
C1601 BATTERY POWER SUPPLY
STC-9
< COMPONENT DIAGNOSIS >
[EPS]
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COMPONENT DIAGNOSIS
C1601 BATTERY POWER SUPPLY
Description
INFOID:0000000001716732
Power is supplied from the battery to EPS control unit.
DTC Logic
INFOID:0000000001716733
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES
>> Proceed to diagnosis procedure. Refer to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001697724
1.
CHECK EPS CONTROL UNIT POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect EPS control unit harness connector.
3.
Turn ignition switch ON. (Do not start engine.)
4.
Check voltage between EPS control unit harness connector
M53 (A) terminal 10 and M54 (B) terminal 17 and ground.
5.
Turn ignition switch “OFF”.
6.
Check voltage between EPS control unit harness connector
M53 (A) terminal 10 and M54 (B) terminal 17 and ground.
7.
Connect EPS control unit harness connector.
OK or NG
OK
>> GO TO 2.
DTC
Display item
Malfunction detected condition
Possible cause
C1601
BATTERY VOLT
When the power supply malfunction supplied to EPS
control unit is detected.
• Harness or connector
• EPS control unit
Self-diagnosis results
BATTERY VOLT
Connector
Terminal
Voltage
(A) M53
10 – Ground
Battery voltage
(B) M54
17 – Ground
Battery voltage
AWGIA0031ZZ
Connector
Terminal
Voltage
(A) M53
10 – Ground
Approx. 0 V
(B) M54
17 – Ground
Battery voltage
AWGIA0028ZZ
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 and fusible link box).
• 10 A fuse [No. 2, located in the fuse block (J/B)].
• Harness for short or open between battery and EPS control unit harness connector M54 termi-
nal 17.
• Harness for short or open between ignition switch and EPS control unit harness connector M53
terminal 10.
2.
CHECK EPS CONTROL UNIT GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect EPS control unit harness connector.
3.
Check continuity between EPS control unit harness connector
M54 terminal 18 and ground.
Also check harness for short to power.
4.
Connect EPS control unit harness connector.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit, short to ground or short to power in
harness or connectors.
3.
CHECK DTC
1.
Start engine.
Does EPS warning lamp turn OFF?
YES
>> INSPECTION END
NO
>> Perform self-diagnosis, repair or replace damaged parts. Refer to
Special Repair Requirement (Models with ESP)
INFOID:0000000001716734
1.
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform the neutral position adjustment for the steering angle sensor, when replacing the EPS control
unit. Refer to
BRC-90, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Descrip-
.
>> END
Connector
Terminal
Continuity
M54
18
Yes
AWGIA0029ZZ
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