Nissan Maxima Service and Repair Manual: System description
- Diagnosis system [ABS actuator and electric unit (control unit)]
System Diagram Hydraulic Circuit Diagram Primary side VDC/TCS/ABS actuator Primary side VDC switch-over valve 1 (USV1) Primary side VDC switch-over valve 1 (HSV1) Primary side pump Rear right inlet solenoid valve Primary side inlet valve Primary side damper Front left inlet solenoid valve Rear right outlet solenoid valve Front left outlet solenoid valve Front left caliper Rear right caliper Rear left caliper Front right caliper Rear left outlet solenoid valve Front right outlet solenoid valve Rear left inlet solenoid valve Secondary side damper Secondary side inlet valve Front right inlet solenoid valve Secondary side pump Secondary side VDC switch-over valve 2 (HSV2) Secondary side VDC swit
System Diagram System Description Traction Control System is a function that electronically controls engine torque and brake fluid pressure to ensure the optimum slippage ratio at drive wheels by computing wheel speed signals from 4 wheel sensors. When ABS actuator and electric unit (control unit) detects a spin at drive wheels, it compares wheel speed signals from all 4 wheels. At this time, LH and RH front brake fluid pressure are controlled, while fuel being cut to engine and throttle valve being closed to reduce engine torque by the control unit. Further more, throttle position is continuously controlled to ensure the optimum engine torque at all times.
System Diagram System Description Anti-Lock Braking System is a function that detects wheel revolution while braking, electronically controls braking force, and prevents wheel locking during sudden braking. It improves handling stability and maneuverability for avoiding obstacles. Electrical system diagnosis by CONSULT is available.
System Diagram System Description Electric Brake force Distribution functions as follows: ABS actuator and electric unit (control unit) detects subtle slippages between the front and rear wheels during braking. Then it electronically controls the rear braking force (brake fluid pressure) to reduce rear wheel slippage. Accordingly, it improves vehicle stability. Electrical system diagnosis by CONSULT is available.
CONSULT Function (ABS) FUNCTION CONSULT can display each diagnostic item using the following diagnostic test modes. Diagnostic test mode Function ECU Identification ABS actuator and electric unit (control unit) part number can be read Self Diagnostic Result Displays ABS actuator and electric unit (control unit) self-diagnosis results Data Monitor Displays ABS actuator and electric unit (control unit) input/output data in real time. Active Test Operation of electrical loads can be checked by sending drive signals to them Work support Supports inspections and adjustments.