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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis (Single Page) >> Steering >> Steering Control Systems >> Steering Control System (Electric Power Steering) >> Ecu Diagnosis Information >> EPS Control Unit >> Reference Value
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Reference Value

VALUES ON THE DIAGNOSIS TOOL 

NOTE: SYMBOL The following table includes information (items) inapplicable to this vehicle: For information (items) applicable to this vehicle, refer to CONSULT display items.
Monitor item Data monitor
Condition Display value
BATTERY VOLT Engine running 10.5 V - 16 V
STEERING TORQUE Engine running Steering wheel: Not steering (There is no steering force) Approx. 0.0 Nm
Steering wheel: Right turn Positive value (Nm)
Steering wheel: Left turn Negative value (Nm)
STEERING ANGLE SIGNAL Steering wheel: Not steering (There is no steering force) Approx. 0 deg
Steering wheel: Right turn Positive value (deg)
Steering wheel: Left turn Negative value (deg)
STEERING ANGLE SPEED Steering wheel: Not steering (There is no steering force) Approx. 0 deg/s
Steering wheel: Right turn Positive value (deg/s)
Steering wheel: Left turn Negative value (deg/s)
MOTOR CURRENT Engine running Steering wheel: Not steering (There is no steering force) Approx. 0 A
Steering wheel: Right or left turn Displays consumption current of EPS motor (A)*1
Target motor current Engine running Steering wheel: Not steering (There is no steering force) Approx. 0 A
Steering wheel: Right turn Positive value (A)
Steering wheel: Left turn Negative value (A)
C/U TEMP Engine running Displays temperature of inside of EPS control unit [°C]
Assist level Engine running 100% *2
VEHICLE SPEED Vehicle stopped 0.00 km/h
While driving Approximately equal to the indication on speedometer *3 (inside of ±10%)
WARNING LAMP Power steering warning lamp: ON On
Power steering warning lamp: OFF OFF
STEERING ANGLE SENSOR STATUS Malfunction in steering angle sensor. ABNORMAL
No Malfunction in steering angle sensor. NORMAL
ENGINE STATUS Engine not running STOP
Engine running RUN
Engine cranking CRANK
HEAT PROTECT STATUS Ignition switch ON or Engine running No over heat. NORMAL
Over heat. PRTECT
MOTOR REVOLUTION SPEED Engine running Steering wheel: Not steering (There is no steering force) Displays an almost constant value (rpm)
Steering wheel: Right turn The positive value changes as a steering speed (rpm)
Steering wheel: Left turn The negative value changes as a steering speed (rpm)
CONTROL MODULE ESTM TEMP Engine running Displays temperature of inside of EPS control unit [°C]

*1: Almost in accordance with the value of "Target motor current". It is not a malfunction though these values are not accorded when steering quickly

*2: Normally displays 100%. In case of an excessive stationary steering, the assist curvature gradually falls. However, it returns to 100% when left standing.

*3: It is not a malfunction, though it might not be corresponding just after ignition switch ON.

TERMINAL LAYOUT 

GNSDB139235Courtesy of NISSAN NORTH AMERICA, INC.

PHYSICAL VALUES 

Terminal No.(Wire Color) Description Condition Value(Approx.)
+ - Signal name Input/Output
1(W) Ground Battery power supply Input Always Battery voltage
2(B) Ground Ground - Always 0 V
6(BR) Ground Ignition power supply Input Ignition switch: ON Battery voltage
Ignition switch: OFF 0 V
7(R) - CAN-Low Input/Output - -
8(L) - CAN-High Input/Output - -