I30 1996-1997

Turbine Speed Sensor

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Operation



Specific to:

Infiniti G20 1996, 1999-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2001

The Turbine Speed Sensor (TSS) is a permanent magnet output coil device that monitors the transmission/transaxle input revolution speed. A reluctor is attached to the transmission/transaxle direct clutch, and is used to generate a constant signal as it passes the TSS magnetic coil. The TSS Sensor utilizes system voltage (12 volts DC), or reference voltage (5 volts DC) to generate a digital output signal to the ECM that is based upon a 0.5 volt AC reference. The alternating magnetic field is used by the sensor output electronics to produce a generated wave form. The TSS waveform is used by the Electronic Control Module (ECM) to detect the shift timing of the gears, and to control the engine torque and hydraulic pressure for measured operating conditions.  

Removal & Installation



Specific to:

Infiniti I30 1996-2001

The manufacturer does not provide a specific removal and installation procedure for this component. Use the illustration as a guide when servicing this component.

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Fig. Turbine Speed Sensor (TSS) location-I30

Testing



Specific to:

Infiniti G20 1996, 1999-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2001


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 1996, 1999-2002

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 1996, 1999-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2001



Click image to see an enlarged view

Fig. Related Diagnostic Trouble Codes

TSS Circuit Testing

Specific to:

Infiniti G20 1996, 1999-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2001

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

TSS logic is based on alternating lines of magnetic flux which generate an analog signal to the ECM, and are based on the vehicle speed (See Figure 1).

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 TSS to verify the signal with a GMM, and verify ECM communication before replacing the TSS Sensor.

Click image to see an enlarged view

Fig. Figure 1: TSS Range Chart

TSS Strategy

Specific to:

Infiniti G20 1996, 1999-2002

Infiniti G35 2003-2005

Infiniti I30 1996-2001

Infiniti I35 2002-2004

Infiniti M45 2003-2004

Infiniti Q45 1996-2001

The TSS provides a magnetically generated signal waveform (See Figure 1) to the Electronic Control Module (ECM) to detect the shift timing of the gears, and to control the engine torque and hydraulic pressure for measured operating conditions. The TSS signal frequency varies according to transmission/transaxle input speed, and is compared with the Crankshaft Position (CKP) Sensor, Camshaft Position (CMP) Sensor, and Vehicle Speed Sensor (VSS) signals for optimum shifting under measured operating conditions.

 
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