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Nissan Altima HL32 Hybrid. Manual - part 1068
EPS CONTROL UNIT
STC-51
< ECU DIAGNOSIS >
C
D
E
F
H
I
J
K
L
M
A
B
STC
N
O
P
NOTE:
While stopping or driving, EPS control unit decreases the output to EPS motor while extremely using the
power steering function (e.g., full steering) for protecting EPS motor and EPS control unit (Protect overload
status). While activating protect overload status, the assist torque gradually decreases, and the steering wheel
turning force becomes heavy. The normal assist torque reactivates by not steering for approximately 10 min-
utes in READY mode state.
DTC Inspection Priority Chart
INFOID:0000000004212884
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
DTC Index
INFOID:0000000004212885
Warn-
ing
lamp
DTC
Malfunction item
Fail-safe
ON
C1601
Battery power supply
Power assistance stops
ON
C1604
Torque sensor
ON
C1606
EPS motor
ON
C1607
EPS control unit memory (EEPROM) system
EPS motor angle sensor initialization and torque sensor cali-
bration data are set to the default values.
ON
C1608
EPS control unit
When temperature sensor in EPS
control unit is open or short
Power assistance continues at certain temperature
Other than the above
Power assistance stops
ON
C1609
Vehicle speed signal
Amount of power assistance is fixed for a speed of 100 km/h
(62 MPH).
ON
C1613
Torque sensor calibration not performed
—
ON
C16A0 HV ECU
Power assistance stops
ON
C16A1 EPS DC/DC converter
ON
C16A2 EPS motor angle sensor initialization not performed
—
ON
U0129
Lost communication with brake ECU
Amount of power assistance is fixed for a speed of 100 km/h
(62 MPH).
ON
U0293
Lost communication with HV ECU
Power assistance stops
Priority
Detected items (DTC)
1
• U0129 LOST COMM (BRAKE)
• U0293 LOST COMM (HV ECU)
2
• C1613 TQ SE CLB NOT PFRM
• C16A2 ANG SE INT NOT PFM
3
• C1601 BATTERY VOLT
• C1609 VHCL SPEED SIGNAL
• C16A0 HV ECU
• C16A1 EPS DCDC CONVERTER
4
• C1604 TORQUE SENSOR
• C1606 EPS MOTOR
• C1607 EEPROM
• C1608 CONTROL UNIT
DTC
Items
(CONSULT-III screen terms)
Reference
C1601
BATTERY VOLT
C1604
TORQUE SENSOR
C1606
EPS MOTOR