Nissan Sentra Service Manual: Diagnosis system [abs actuator and electric unit (control unit)]
CONSULT Function (ABS)
FUNCTION
CONSULT can display each diagnostic item using the following direct diagnostic modes.
| Direct Diagnostic Mode | Description |
| ECU identification | The ABS actuator and electric unit (control unit) part number is displayed. |
| Self Diagnostic Result | The ABS actuator and electric unit (control unit) self diagnostic results are displayed. |
| Data Monitor | The ABS actuator and electric unit (control unit) input/output data is displayed in real time. |
| Active Test | The ABS actuator and electric unit (control unit) activates outputs to test components. |
| Work support | The settings for ABS actuator and electric unit (control unit) functions can be changed. |
| CAN DIAG SUPPORT MNTR | The result of transmit/receive diagnosis of CAN communication is displayed. |
ECU IDENTIFICATION
ABS actuator and electric unit (control unit) part number is displayed.
SELF DIAGNOSTIC RESULT
Operation Procedure
-
Before performing the self-diagnosis, start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.
How To Erase Self Diagnostic Result
-
After erasing DTC memory, start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute as the final inspection, and make sure that the ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp turn OFF.
CAUTION:
If memory cannot be erased, perform applicable diagnosis.
NOTE:
-
When the wheel sensor malfunctions, after inspecting the wheel sensor system, the ABS warning lamp, SLIP indicator lamp and brake warning lamp will not turn OFF even when the system is normal, unless the vehicle is driven at approximately 30 km/h (19 MPH) or more for approximately 1 minute.
-
Brake warning lamp will turn ON in case of parking brake operation (when switch is ON) or of brake fluid level switch operation (when brake fluid is insufficient).
-
VDC OFF switch should not stay in ON position.
Display Item List
Refer to BRC-43, "DTC Index".
DATA MONITOR
×: Applicable
–: Not applicable
ACTIVE TEST
The active test is used to determine and identify details of a malfunction, based on self-diagnosis test results and data obtained in the DATA MONITOR. In response to instructions from CONSULT, instead of those from ABS actuator and electric unit (control unit) on the vehicle, a drive signal is sent to the actuator to check its operation.
CAUTION:
-
Never perform ACTIVE TEST while driving the vehicle.
-
Always bleed air from brake system before active test.
-
Never perform active test when system is malfunctioning.
NOTE:
-
When active test is performed while depressing the pedal, the pedal depressing stroke may change. This is not a malfunction.
-
“TEST IS STOPPED” is displayed approx. 10 seconds after operation start.
-
When performing active test again after “TEST IS STOPPED” is displayed, select “BACK”.
-
ABS warning lamp, brake warning lamp and VDC warning lamp may turn ON during active test. This is not a malfunction.
ABS IN Valve and ABS OUT Valve
When “Up”, “Keep” or “Down” is selected on display screen, the following items are displayed when system is normal.
*: Immediately after being selected, status is “On”. Status changes to “Off” after approx. 2 seconds.
ABS IN Valve (ACT) and ABS OUT Valve (ACT)
When “Up”, “ACT UP” or “ACT KEEP” is selected on display screen, the following items are displayed when system is normal.
*: Immediately after being selected, status is “On”. Status changes to “Off” after approx. 10 seconds.
ABS Motor
When “On” or “Off” is selected on display screen, the following items are displayed when system is normal.
NOTE:
Display occasionally changes On/Off for a moment after ignition switch is turned ON. This is an operation for checking purposes and is not a malfunction.
WORK SUPPORT
| Conditions | Description |
| ST ANGLE SENSOR ADJUSTMENT | Steering angle sensor neutral position adjustment can be performed.
Refer to BRC-54, "Work Procedure". |
System
VDC/TCS/ABS
VDC/TCS/ABS : System Diagram
VDC/TCS/ABS : System Description
The system switches fluid pressure of each brake caliper and
each wheel cylinder to increase, to hold, or to
...
Ecu diagnosis information
Abs actuator and electric unit
(control unit)
Reference Value
VALUES ON THE DIAGNOSIS TOOL
CAUTION:
The display shows the control unit calculation data, so a
normal value might be displayed ev ...
Other materials:
Outside mirrors
The outside mirror remote control will operate
only when the ignition switch is in the ACC or ON
position.
Move the small switch 1 to select the right or left
mirror. Adjust each mirror to the desired position
using the large switch 2 .
WARNING
Objects viewed in the outside mi ...
Unit disassembly and assembly
Steering gear and linkage
Exploded View
Outer socket
Boot clamp (small diameter)
Boot
Boot clamp (large diameter)
Inner socket
Gear housing assembly
Disassembly and Assembly
DISASSEMBLY
Loosen outer socket lock nut, and remove outer socket.
CAUT ...
Dtc/circuit diagnosis
Power supply and ground circuit
Audio unit
AUDIO UNIT : Diagnosis Procedure
Regarding wiring diagram information, refer to av-88, "wiring diagram".
1.Check fuse
Check that the following fuses are not blown.
Are the fuses blown?
Yes >> replace the blown fuse after repairing ...
