Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ 07458 All.

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Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All.

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Presentation transcript:

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 1 FIGURE 22–1 The tire pressure placard (sticker) on the driver’s side door or door jamb indicates the specified tire pressure.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 2 FIGURE 22–2 A tire with low inflation will have a shorter distance (radius) between the center of the wheel and the road and will therefore rotate faster than a tire that is properly inflated.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 3 FIGURE 22–3 The speeds of the diagonally opposed wheels are added together and then compared to the other two wheels to check if one tire is rotating faster.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 4 FIGURE 22–4 The indirect tire-pressure monitoring system has a reset switch that should be depressed after rotating or replacing tires.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 5 FIGURE 22–5 A clear plastic valve-stem tire-pressure monitoring sensor, showing the round battery on the right and the electronic sensor and transistor circuits on the left.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 6 FIGURE 22–6 A conventional valve stem is on the right compared with a rubber TPMS sensor stem on the left. Notice the tapered and larger brass stem. The rubber TPMS sensor also uses a longer cap that makes it easy for a technician to spot that this is not a conventional rubber valve stem.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 7 FIGURE 22–7 The three styles of TPMS sensors most commonly found include the two stem- mounted (rubber and aluminum, left and top), and the banded style (right).

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 8 FIGURE 22–8 A typical tire-pressure monitoring system tester. The unit should be held near the tire and opposite the valve stem if equipped with a wheel-mounted sensor, and near the valve stem if equipped with a valve-stem-type sensor.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 9 FIGURE 22–9 Some vehicles display the actual measured tire pressure for each tire on a driver information display.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 10 FIGURE 22–10 A tire-pressure warning light can vary depending on the vehicle, but includes a tire symbol.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 11 FIGURE 22–11 The parts of a typical stem-mounted TPMS sensor. Notice the small hole used to monitor the inflation pressure. The use of stop-leak can easily clog this small hole.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 12 FIGURE 22–12 When replacing a TPMS sensor, be sure to record the sensor ID because this needs to be entered into the system through the use of a tester or scan tool.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 13 FIGURE 22–13 A magnet is placed around the valve stem to reprogram some stem-mounted tire- pressure sensors.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 14 FIGURE 22–14 Always use an accurate, known-good tirepressure gauge. Digital gauges are usually more accurate than mechanical gauges.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 15 FIGURE 22–15 A clicker-type valve core tool ensures that the valve core is tightened to factory specifications.

Automotive Chassis Systems, 5/e By James D. Halderman Copyright © 2010, 2008, 2004, 2000, 1995 Pearson Education, Inc., Upper Saddle River, NJ All rights reserved. 16 FIGURE 22–16 An assortment of service parts that include all of the parts needed to service a stem-mounted TPMS sensor being installed after removal for a tire replacement or repair.