I30 1996-1997

Vehicle Speed Sensor

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Removal & Installation



Specific to:

Infiniti I30 1996-2001

The manufacturer does not provide a specific removal and installation procedure for this component.

Testing



Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2001


NOTE
Refer to the Electrical Wiring Diagram for component and connector locations, connector views, and circuit-specific information.

Connection & Wiring Diagnosis

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2001

Refer to the Electrical Wiring Diagram for component and connector locations, connector views, and circuit-specific information.

Many intermittent open or short circuits may be caused by wiring harness and connector movement due to vibration, engine torque, bumps and rough pavement, etc.

  1. Test the wiring harness and connectors by performing the following tests:

    Move the related connectors and wiring while monitoring the appropriate scan tool data.
     
    Move the related connectors and wiring with the component commanded ON and OFF. Using a suitable the scan tool, observe the component operation.
     
    With the engine running, move the related connectors and wiring while monitoring component operation.
     
    If harness or connector movement affects the data displayed, the component and system operation, or the engine operation, inspect and repair the harness or connections as necessary.
     

  2.  
  3. Test the connector terminal pins and/or wiring by performing the following tests:

    Inspect for incorrect mating of the connector halves, or terminals not fully seated in the connector body.
     
    Inspect for improperly formed or damaged terminals and test for incorrect terminal tension.
     
    Inspect for poor terminal to wire connections including terminals crimped over insulation. This requires removing the terminal from the connector body.
     
    Inspect for corrosion or water intrusion. Pierced or damaged insulation can allow moisture to enter the wiring. The conductor can corrode inside the insulation with little visible evidence. Look for swollen and/or brittle sections of wire in the suspect circuits.
     
    Inspect for wires that are broken inside the insulation by gently pulling on suspect sections of wiring.
     

  4.  

Related Diagnostic Trouble Codes

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2001



Click image to see an enlarged view

Fig. Related Diagnostic Trouble Codes

VSS Circuit Testing

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2001

Use a suitable scan tool or a Graphing Multi-Meter (GMM) in order to view the VSS data.

VSS logic is based on alternating lines of magnetic flux which generate an analog signal to the ECM, and are based on the vehicle speed.

Verify that the engine that there is no foreign material obstructing the path between the reluctor and the VSS. If any engine mechanical faults are evident, locate and repair as required before continuing.

A Digital Volt-Ohm Meter (DVOM) may be used to verify the condition of the wiring: additional information may be acquired by taking measurements at the sensor connector as well as the ECM connector. If significant resistance is measured (greater than 5 ohms), check the wiring harness and connections for corrosion, poor pin connections, or damaged wires.

If all engine wiring and pin connections are confirmed, disconnect the VSS to verify the signal with a GMM, and verify ECM communication before replacing the VSS Sensor.

Click image to see an enlarged view

Fig. VSS Range Chart

VSS Strategy

Specific to:

Infiniti G20 2000-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1998-2001

The VSS provides a magnetically generated signal waveform to the Electronic Control Module (ECM) for a number of engine control, drive train, and information display system calculations. The VSS signal frequency varies according to vehicle speed, and is compared with the Crankshaft Position (CKP) Sensor and Camshaft Position (CMP) Sensor signals for measured operating conditions. The magnetic waveform pattern is used by the Electronic Control Module (ECM) to calculate engine and vehicle load, ignition timing, fuel injector timing and pulse width, and the speedometer display.

 
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