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HOMESERVICE MANUALSINFINITI2006FX35 AWDREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLBRAKE CONTROL SYSTEMTROUBLE DIAGNOSISFOR FAST AND ACCURATE DIAGNOSISPRECAUTIONS FOR DIAGNOSIS
2006 Infiniti FX35 AWD

Precautions For Diagnosis

2006 Infiniti FX35 AWDSECTION Precautions For Diagnosis
  • Before performing diagnosis, always read precautions. Refer to "HOW TO PROCEED WITH DIAGNOSIS ".
  • If ABS actuator and electric unit (control unit), steering angle sensor, steering system parts or suspension system parts have been replaced, or if alignment has been adjusted, be sure to adjust neutral position of steering angle sensor before driving. Refer to "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION ".
  • After diagnosis is finished, be sure to erase memory. Refer to "SELF-DIAGNOSIS ".
  • When checking continuity and voltage between units, be sure to check for disconnection, looseness, bend, or collapse of connector terminals. If any malfunction is found, repair or replace connector terminals.
  • For intermittent symptoms, possible cause is malfunction in harness, harness connector, or terminals. Move harness, harness connector, and terminals to check for poor connections.
  • If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.
  • To use CONSULT-II to perform self-diagnosis of ABS actuator and electric unit (control unit), active tests, or work support, first stop work, then connect CONSULT-II and select "ABS".
  • While self-diagnostic results of CONSULT-II shows malfunction, if CONSULT-II active test is performed, an engine system error may be indicated. In this case, start engine to resume the normal screen.
  • VDC/TCS/ABS system electronically controls brake operation and engine output. The following symptoms may be caused by normal operations:
    PROBLEM SYMPTOMS CHART

    Symptom Symptom description Result
    Motor operation noise This is noise of motor inside ABS actuator and electric unit (control unit). Slight noise may occur during VDC, TCS, and ABS operation. Normal
    When the vehicle speed goes over 20 km/h (12.5 MPH), motor and valves operating noise may be heard. It happens only once after ignition switch is ON. This is a normal status of the system operation check.
    System operation check noise When engine starts, slight "click" noise may be heard from engine room. This is normal and is part of system operation check. Normal
    VDC/TCS operation (SLIP indicator lamp blinking) TCS may activate momentarily if wheel speed changes when driving over location where friction coefficient varies, when up/downshifting, or when fully depressing accelerator pedal. Normal
    Cancel the VDC/TCS function for the inspection on a chassis dynamometer.
    For inspection of speedometer or other instruments, press VDC OFF SW to turn VDC/TCS function off.
    When accelerator pedal is depressed on a chassis dynamometer (fixed front-wheel type), vehicle speed will not increase. This is not normal. It is result of TCS being activated by stationary front wheels. Warning lamp may also illuminate to indicate "sensor system error". This is also normal, and is the result of the stationary front wheels being detected. To be certain, restart engine, and drive vehicle at 30 km/h (19 MPH) or more. Make sure warning lamp does not illuminate.
    ABS operation (Longer stopping distance) On roads with low friction coefficients, such as snowy roads or gravel roads, vehicles with ABS may require a longer stopping distance. Therefore, when driving on such roads, avoid overconfidence and keep speed sufficiently low. Normal
    Insufficient feeling of acceleration Depending on road conditions, driver may feel that feeling of acceleration is insufficient. This is because traction control, which controls engine and brakes to achieve optimal traction, has the highest priority (for safety). As a result, there may be times when acceleration is slightly less than usual for the same accelerator pedal operation. Normal
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.