DETAILED FLOW
- COLLECT THE INFORMATION FROM THE CUSTOMER Get the detailed information from the customer about the symptom (the condition and the environment when the incident/malfunction occurred) using the diagnosis worksheet. GO TO 2.
- PERFORM THE SELF-DIAGNOSIS Check the DTC display with the self-diagnosis function. Refer to " «CONSULT-III Function (EPS)»(ref-295112-S24044738422008081400000) ". Is there any DTC displayed? YES: GO TO 3. NO: GO TO 4 .
- PERFORM THE SYSTEM DIAGNOSIS Perform the diagnosis applicable to the displayed DTC. Refer to " «DTC NO. INDEX»(ref-295112-S23489356692008081400000) ". GO TO 6 .
- CHECK THE WARNING LAMP FOR ILLUMINATION Check that the warning lamp illuminate. Is ON/OFF timing normal? YES: GO TO 5. NO: GO TO 2 .
- PERFORM THE DIAGNOSIS BY SYMPTOM Perform the diagnosis applicable to the symptom. GO TO 6.
- REPAIR OR REPLACE THE MALFUNCTIONING PARTS Repair or replace the specified malfunctioning parts. GO TO 7.
- FINAL CHECK Perform the self-diagnosis again, and check that the malfunction is repaired completely. After checking, erase the self-diagnosis memory. Refer to " «CONSULT-III Function (EPS)»(ref-295112-S24044738422008081400000) ". Is no other DTC present and the repair completed? YES: INSPECTION END NO: GO TO 3 .
Scheme 7
FUNCTION
CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
| Diagnostic test mode | Function |
|---|---|
| Self-diagnostic results | Self-diagnostic results can be read and erased quickly. |
| Data monitor | Input/Output data in the EPS control unit can be read. |
| ECU part number | Steering column assembly number can be read. |
CONSULT-III FUNCTION CHART (EPS)
SELF-DIAG RESULTS MODE
Display Item List
Refer to " DTC NO. INDEX ".
DATA MONITOR MODE
Display Item List
| Monitor item (Unit) | Remarks |
|---|---|
| BATTERY VOLT (V) | Displays the power supply voltage for EPS control unit. |
| TORQUE SENSOR (Nm) | Displays steering wheel turning force detected by torque sensor. |
| MOTOR SIG (A) | Displays the current commanded value to EPS motor. |
| MOTOR CURRENT (A) | Displays the current value consumed by EPS motor. |
| ASSIST TORQUE (Nm) | Displays assist torque being output by the electric power steering. |
| C/U TEMP (°C) | Displays the temperature of the EPS control unit. |
| ASSIST LEVEL (%) | Normally displays 100%. In case of an excessive stationary steering, the assist curvature gradually falls. However, it return to 100% when left standing. |
| VEHICLE SPEED (km/h) or (MPH) | Vehicle speed is displayed from vehicle speed signal via CAN communication. |
| WARNING LAMP (On/Off) | EPS warning lamp control status is displayed. |
| ENGINE STATUS (STOP/RUN/STALL/CRANK) | Engine speed is displayed from engine status signal via CAN communication. |
| MOTOR TEMP (°C) | Displays the temperature of EPS motor. |
| VHCL SPD CALC (km/h) or (MPH) | Displays vehicle speeds used for controlling EPS. |
DISPLAY ITEM LIST
Special Repair Requirement
- ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the steering column assembly. Refer to " «ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : SPECIAL REPAIR REQUIREMENT»(ref-295117-S18121153782008081400000) ". (VDC models) END
- ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the steering column assembly. Refer to " «ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : SPECIAL REPAIR REQUIREMENT»(ref-295117-S18121153782008081400000) ". (VDC models) END
- ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the steering column assembly. Refer to " «ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : SPECIAL REPAIR REQUIREMENT»(ref-295117-S18121153782008081400000) ". (VDC models) END
- ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the steering column assembly. Refer to " «ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : SPECIAL REPAIR REQUIREMENT»(ref-295117-S18121153782008081400000) ". (VDC models) END
- ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the steering column assembly. Refer to " «ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : SPECIAL REPAIR REQUIREMENT»(ref-295117-S18121153782008081400000) ". (VDC models) END
- ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the steering column assembly. Refer to " «ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : SPECIAL REPAIR REQUIREMENT»(ref-295117-S18121153782008081400000) ". (VDC models) END
- ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the steering column assembly. Refer to " «ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : SPECIAL REPAIR REQUIREMENT»(ref-295117-S18121153782008081400000) ". (VDC models) END
- ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION Always perform the neutral position adjustment for the steering angle sensor, when replacing the steering column assembly. Refer to " «ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : SPECIAL REPAIR REQUIREMENT»(ref-295117-S18121153782008081400000) ". (VDC models) END
PHYSICAL VALUES
| Terminal No. (Wire Color) | Description | Condition | Value (Approx.) | ||
|---|---|---|---|---|---|
| + | Signal name | Input/Output | |||
| 1 (R) | Ground | Battery power supply | Input | Always | Battery voltage |
| 2 (B) | Ground | Ground | Output | Always | 0 V |
| 3 (W) | Ground | Ignition power supply | Input | Ignition switch: ON | Battery voltage |
| Ignition switch: OFF | 0 V | ||||
| 5 (L) | Ground | CAN-H | Input/Output | ||
| 7 (P) | Ground | CAN-L | Input/Output | ||
CONNECTOR TERMINAL SPECIFICATION
Scheme 8
Scheme 9
Scheme 10
Fail-Safe
- If any malfunction occurs in the system, and control unit detects the malfunction, EPS warning lamp on combination meter turns ON to indicate system malfunction.
- When EPS warning lamp is ON, enters into a manual steering state. (Control turning force steering wheel becomes heavy.)
FOR USA AND CANADA : Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted. Information necessary to service the system safely is included in the SRS AIRBAG and SEAT BELTS articles.
| WARNING | To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer. Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the " SRS AIRBAG ". Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this article. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. |
FOR USA AND CANADA : Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
Note. This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI VEHICLE IMMOBILIZER SYSTEM - NATS). Remove and install all control units after disconnecting both battery cables with the ignition knob in the "LOCK" position. Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results. For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock mechanism is adopted on the key cylinder. For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and steering wheel rotation will become impossible. If steering wheel rotation is required when battery power is interrupted, follow the procedure below before starting the repair operation.
EXCEPT FOR MEXICO : Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. Information necessary to service the system safely is included in the SRS AIRBAG and SEAT BELTS articles.
| WARNING | To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in the event of a collision which would result in air bag inflation, all maintenance must be performed by an authorized NISSAN/INFINITI dealer. Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag Module, see the " SRS AIRBAG ". Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this article. SRS wiring harnesses can be identified by yellow and/or orange harnesses or harness connectors. |
EXCEPT FOR MEXICO : Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
Note. This Procedure is applied only to models with Intelligent Key system and NVIS/IVIS (NISSAN/INFINITI VEHICLE IMMOBILIZER SYSTEM - NATS). Remove and install all control units after disconnecting both battery cables with the ignition knob in the "LOCK" position. Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work. If DTC is detected, perform trouble diagnosis according to self-diagnostic results. For models equipped with the Intelligent Key system and NVIS/IVIS, an electrically controlled steering lock mechanism is adopted on the key cylinder. For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and steering wheel rotation will become impossible. If steering wheel rotation is required when battery power is interrupted, follow the procedure below before starting the repair operation.