Tire Pressure Monitoring Issues an Industry Segment Approach

1
Tire Pressure Monitoring Issues an Industry
Segment Approach

• Charlie Gorman
• Equipment Tool Institute
• November 4, 2004

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Industry Segments Impacted by TPMS

• OEMs and their dealerships
• Aftermarket Wheel Manufacturers
• Service Equipment Manufacturers i.e.
• Tire machines
• Scan tool manufacturers
• Service facilities

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Wheel Manufacturers

• What wheel dimensions are critical to proper
  wheel sensor installation and operation?
• Are there any alloys or other materials that
  could interfere with proper radio transmission?
• Does size count?

4
Tire Machine Manufacturers

• TPMS devices can be easily damaged
• Direct TPMS systems use pressure transducer /
  transmitters integrated with the valve stem.
  Some OEMs require that the TPMS device be removed
  from the wheel before the tire is removed from
  the rim.
• When breaking the bead, care must be taken
  regarding valve stem position.

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Broken Sensor
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Scan Tool Manufacturer

• Is a scan tool required to diagnose system
  problems?
• If so what can be diagnosed?
• Faulty sensor? specific to location?
• Faulty receiver? specific to location?
• Sensor Battery low.

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Scan Tool Manufacturer

• If a sensor is moved (rotate tires) or replaced,
  does the system have to be reprogrammed to
  recognize the new sensors?
• Is a scan tool or J2534 reprogramming device
  required to perform the reprogramming event?

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Two Reprogramming Methods

• Cadillac - There are two reprogramming methods.
  You must use the J-41760 magnet when a new sensor
  is installed. During tire rotation, you can use
  either the magnet or your Tech 2.

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Service Facilities

• What vehicles are equipped with TPMS?
• Is it a direct or indirect system?
• What precautions need to be taken when removing
  and replacing tires?
• Can tires be rotated without reprogramming?
• If a system sets a code other than low pressure,
  is the shop equipped and trained to fix it?
• If enhanced wheels are installed, will they
  accept the TPMS sensors without difficulty?
• What wheel size restrictions exist as a result of
  TPMS systems?

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What needs to be done?Wheel Manufactures

• SEMA members get dimension information Directly
  from OEMs
• Meetings held in May
• ETI pledges to offer help in this area using NPIG
  info from Tech Week (with OEM permission)
• Tech Weeks held in June and December
• NPIG (New Product Information Guidelines)

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NPIG - Tire
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NPIG - Wheel
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NPIG - Alloy Center Hole Detail
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NPIG for TPMS
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What Needs to Be Done?Equipment manufacturers

• Tire Machine Manufacturers need to continue their
  relationship with OEMs
• Gather and pass along tire RR info. That
  protects TPMS systems from damage.
• Scan Tool Manufacturers need to continue
  receiving bit byte information that allows
  aftermarket scan tools to reset and Reprogram
  TPMS systems where necessary

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Scan Tools diagnosis and repair

• Through the NASTF agreement all OEMs have agreed
  to share the information required to design and
  manufacture aftermarket diagnostic tools
• The Equipment subcommittee has asked OEMs to add
  TPMS modules to the NASTF reporting Matrix
• Is a scan tool used at the dealership? If so,
  have you provided the info necessary to duplicate
  the function?

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Scan Tools - Reprogramming

• Through the NASTF agreement all OEMs have agreed
  to share the information required to design and
  manufacture aftermarket reprogramming tools
• The Equipment subcommittee has asked OEMs to add
  TPMS modules to the NASTF reprogramming matrix
• Is reprogramming required?
• Is it done using J2534 standard, or some other
  method?
• Is OEM software required?

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What Needs to be done?Service Facilities

• Use OEM and aftermarket service information to
  identify models using TPMS
• Diagnostics, precautions, reprogramming, etc.
• Use tire machine manufacturer TSBs and warnings
• Use NASTF matrix and your scan tool manufacturer
  to determine scan tool requirements and
  capabilities.
• If changing equipment (wheels / tires) on a
  vehicle, make sure replacement will allow TPMS to
  function properly (check manufacturer
  specifications)

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The Future

• Im convinced that the aftermarket information
  providers will at some point consolidate all this
  information into a condensed TPMS book or
  database If you think there is a market for
  this, contact your favorite manual provider and
  tell them to get on it.

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Thank You

• http//www.etools.org/i4a/pages/Index.cfm?pageid2
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