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Driveline
need help problems with P0720 Output Shaft Speed Sensor circuit
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<blockquote data-quote="hotcobra03" data-source="post: 10278087" data-attributes="member: 53096"><p><strong>po720</strong></p><p></p><p>pin test from manual</p><p> </p><p>2003 PCED OBD </p><p>SECTION 5: Pinpoint Tests </p><p>Procedure revision date: 08/19/2002 </p><p></p><p>TJ: Output Shaft Speed (OSS) Sensor </p><p><img src="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=arrowbak.gif~gen~ref.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /><a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325137.htm~gen~ref.htm" target="_blank"> TJ: Introduction </a></p><p> </p><p><strong>TJ1 DTC P0720, P0721, P0722, P0723, AND P1900: VERIFY DRIVE CYCLE </strong></p><p></p><ul> <li data-xf-list-type="ul">Access the OSS PID.</li> <li data-xf-list-type="ul">Drive vehicle.</li> <li data-xf-list-type="ul">Through all gear ranges, shift up and down.</li> </ul><p>Does PID reading increase and decrease with engine and vehicle speed? </p><p>Yes No OSS performed as expected. GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ2" target="_blank">TJ2 </a>. <strong>For Hall Effect Type OSS: </strong></p><p></p><p>KEY OFF. GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ3" target="_blank">TJ3 </a>. </p><p></p><p><strong>For VR Type OSS: </strong></p><p></p><p>GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ5" target="_blank">TJ5 </a>. </p><p><strong>TJ2 VISUAL INSPECTION </strong></p><p></p><ul> <li data-xf-list-type="ul">Disconnect OSS sensor.</li> <li data-xf-list-type="ul">Inspect OSS harness for damage. Inspect OSS vehicle harness connector for damage and proper seating.</li> <li data-xf-list-type="ul">If possible, complete wiggle test.</li> </ul><p>Have any problems been found? </p><p>Yes No REPAIR fault. GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325142.htm~gen~ref.htm#pptZ1" target="_blank">Z1 </a>for intermittent fault diagnosis. </p><p><strong>TJ3 CHECK VPWR TO OSS SENSOR </strong></p><p></p><ul> <li data-xf-list-type="ul">Key on.</li> <li data-xf-list-type="ul">Disconnect OSS sensor.</li> <li data-xf-list-type="ul">Measure VPWR circuit voltage at OSS sensor harness connector.</li> </ul><p>Is voltage greater than 10.5 volts? </p><p>Yes No KEY OFF. GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ4" target="_blank">TJ4 </a>. KEY OFF. Repair open circuit. </p><p><strong>TJ4 CHECK VPWR GND TO OSS SENSOR </strong></p><p></p><ul> <li data-xf-list-type="ul">Measure resistance of PWR GND circuit between OSS sensor harness connector and negative battery post.</li> </ul><p>Is resistance less than 5.0 ohms? </p><p>Yes No GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ5" target="_blank">TJ5 </a>. Repair open circuit. </p><p><strong>TJ5 CHECK HARNESS FOR SHORT TO PWR </strong></p><p></p><ul> <li data-xf-list-type="ul">Key on.</li> <li data-xf-list-type="ul">Disconnect OSS sensor.</li> <li data-xf-list-type="ul">Measure voltage between the OSS signal circuit at the OSS sensor harness connector and ground.</li> </ul><p>Is voltage less than 1.0 volt? </p><p>Yes No KEY OFF. GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ6" target="_blank">TJ6 </a>. KEY OFF. REPAIR short circuit. </p><p><strong>TJ6 CHECK HARNESS FOR OPEN </strong></p><p></p><ul> <li data-xf-list-type="ul">Disconnect PCM.</li> <li data-xf-list-type="ul">Measure resistance of the OSS signal circuit between the OSS sensor harness connector and the PCM harness connector.</li> <li data-xf-list-type="ul">Measure resistance of the OSS SIG RTN circuit between the OSS sensor harness connector and the PCM harness connector.</li> </ul><p>Is each resistance less than 5.0 ohms? </p><p>Yes No GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ7" target="_blank">TJ7 </a>. REPAIR open circuit. </p><p><strong>TJ7 CHECK HARNESS FOR SHORT TO GROUND </strong></p><p></p><ul> <li data-xf-list-type="ul">Measure resistance between OSS signal and SIG RTN circuits at the OSS sensor harness connector.</li> <li data-xf-list-type="ul">Measure resistance between the OSS signal at the the OSS sensor harness connector and chassis ground.</li> </ul><p>Is each resistance greater than 10,000 ohms? </p><p>Yes No <strong>For VR Type OSS: </strong></p><p></p><p>GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ8" target="_blank">TJ8 </a>. </p><p></p><p><strong>For Hall Effect Type OSS: </strong></p><p></p><p>GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ9" target="_blank">TJ9 </a>. REPAIR short circuit. </p><p><strong>TJ8 CHECK RESISTANCE OF OSS SENSOR </strong></p><p></p><ul> <li data-xf-list-type="ul">Measure resistance of the OSS sensor between the pins of the OSS sensor.</li> </ul><p>Is resistance between 400 and 1.25K ohms? </p><p>Yes No REPLACE PCM (REFER to Section 2, <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V322011.htm~gen~ref.htm" target="_blank">Flash Electrically Erasable Programmable Read Only Memory (EEPROM) </a>). REPLACE OSS sensor. </p><p><strong>TJ9 CHECK OSS SIGNAL OUTPUT TO PCM, HALL TYPE OSS </strong></p><p></p><ul> <li data-xf-list-type="ul">Disconnect PCM.</li> <li data-xf-list-type="ul">Raise vehicle to allow rotation of the front drive wheel.</li> <li data-xf-list-type="ul">Key on, transmission in neutral.</li> <li data-xf-list-type="ul">Measure voltage between OSS+ and PWR GND circuits at the PCM harness connector while slowly rotating the drive wheel. <strong>Note: </strong>Opposite wheel must be held stationary. </li> <li data-xf-list-type="ul">The voltage should rise above 5.0 volts and fall below 1.0 volts in a regular cycle. Observe several cycles.</li> </ul><p>Does the OSS output voltage rise and fall as specified? </p><p>Yes No REPLACE PCM (REFER to Section 2, <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V322011.htm~gen~ref.htm" target="_blank">Flash Electrically Erasable Programmable Read Only Memory (EEPROM) </a>). REPLACE OSS sensor. REFER to the workshop manual group for manual transmissions. </p><p></p><p></p><p></p><p> </p><p> c-1107</p><p><a href="https://acrobat.com/#d=Sw9kVG25q1j*96G3kaXMeg" target="_blank">https://acrobat.com/#d=Sw9kVG25q1j*96G3kaXMeg</a></p><p> </p><p> </p><p>c-1148</p><p><a href="https://acrobat.com/#d=BqozZA2ixs02PrqPDSFuAQ" target="_blank">https://acrobat.com/#d=BqozZA2ixs02PrqPDSFuAQ</a></p><p> </p><p> </p><p>connector location...1107/1148</p><p> </p><p> </p><p> <a href="https://acrobat.com/#d=V92tMcdSMaKvDopeHUjWyA" target="_blank">https://acrobat.com/#d=V92tMcdSMaKvDopeHUjWyA</a></p><p> </p><p> instrument cluster testing and codes</p><p><a href="https://acrobat.com/#d=55gJG8oS8SZS3bQqY411pA" target="_blank">https://acrobat.com/#d=55gJG8oS8SZS3bQqY411pA</a></p><p> </p><p> </p><p> if you have a multi meter you should be able to find if you have a short..</p></blockquote><p></p>
[QUOTE="hotcobra03, post: 10278087, member: 53096"] [b]po720[/b] pin test from manual 2003 PCED OBD SECTION 5: Pinpoint Tests Procedure revision date: 08/19/2002 TJ: Output Shaft Speed (OSS) Sensor [IMG]file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=arrowbak.gif~gen~ref.gif[/IMG][URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325137.htm~gen~ref.htm"] TJ: Introduction [/URL] [B]TJ1 DTC P0720, P0721, P0722, P0723, AND P1900: VERIFY DRIVE CYCLE [/B] [LIST] [*]Access the OSS PID. [*]Drive vehicle. [*]Through all gear ranges, shift up and down. [/LIST]Does PID reading increase and decrease with engine and vehicle speed? Yes No OSS performed as expected. GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ2"]TJ2 [/URL]. [B]For Hall Effect Type OSS: [/B] KEY OFF. GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ3"]TJ3 [/URL]. [B]For VR Type OSS: [/B] GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ5"]TJ5 [/URL]. [B]TJ2 VISUAL INSPECTION [/B] [LIST] [*]Disconnect OSS sensor. [*]Inspect OSS harness for damage. Inspect OSS vehicle harness connector for damage and proper seating. [*]If possible, complete wiggle test. [/LIST]Have any problems been found? Yes No REPAIR fault. GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325142.htm~gen~ref.htm#pptZ1"]Z1 [/URL]for intermittent fault diagnosis. [B]TJ3 CHECK VPWR TO OSS SENSOR [/B] [LIST] [*]Key on. [*]Disconnect OSS sensor. [*]Measure VPWR circuit voltage at OSS sensor harness connector. [/LIST]Is voltage greater than 10.5 volts? Yes No KEY OFF. GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ4"]TJ4 [/URL]. KEY OFF. Repair open circuit. [B]TJ4 CHECK VPWR GND TO OSS SENSOR [/B] [LIST] [*]Measure resistance of PWR GND circuit between OSS sensor harness connector and negative battery post. [/LIST]Is resistance less than 5.0 ohms? Yes No GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ5"]TJ5 [/URL]. Repair open circuit. [B]TJ5 CHECK HARNESS FOR SHORT TO PWR [/B] [LIST] [*]Key on. [*]Disconnect OSS sensor. [*]Measure voltage between the OSS signal circuit at the OSS sensor harness connector and ground. [/LIST]Is voltage less than 1.0 volt? Yes No KEY OFF. GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ6"]TJ6 [/URL]. KEY OFF. REPAIR short circuit. [B]TJ6 CHECK HARNESS FOR OPEN [/B] [LIST] [*]Disconnect PCM. [*]Measure resistance of the OSS signal circuit between the OSS sensor harness connector and the PCM harness connector. [*]Measure resistance of the OSS SIG RTN circuit between the OSS sensor harness connector and the PCM harness connector. [/LIST]Is each resistance less than 5.0 ohms? Yes No GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ7"]TJ7 [/URL]. REPAIR open circuit. [B]TJ7 CHECK HARNESS FOR SHORT TO GROUND [/B] [LIST] [*]Measure resistance between OSS signal and SIG RTN circuits at the OSS sensor harness connector. [*]Measure resistance between the OSS signal at the the OSS sensor harness connector and chassis ground. [/LIST]Is each resistance greater than 10,000 ohms? Yes No [B]For VR Type OSS: [/B] GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ8"]TJ8 [/URL]. [B]For Hall Effect Type OSS: [/B] GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V325138.htm~gen~ref.htm#pptTJ9"]TJ9 [/URL]. REPAIR short circuit. [B]TJ8 CHECK RESISTANCE OF OSS SENSOR [/B] [LIST] [*]Measure resistance of the OSS sensor between the pins of the OSS sensor. [/LIST]Is resistance between 400 and 1.25K ohms? Yes No REPLACE PCM (REFER to Section 2, [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V322011.htm~gen~ref.htm"]Flash Electrically Erasable Programmable Read Only Memory (EEPROM) [/URL]). REPLACE OSS sensor. [B]TJ9 CHECK OSS SIGNAL OUTPUT TO PCM, HALL TYPE OSS [/B] [LIST] [*]Disconnect PCM. [*]Raise vehicle to allow rotation of the front drive wheel. [*]Key on, transmission in neutral. [*]Measure voltage between OSS+ and PWR GND circuits at the PCM harness connector while slowly rotating the drive wheel. [B]Note: [/B]Opposite wheel must be held stationary. [*]The voltage should rise above 5.0 volts and fall below 1.0 volts in a regular cycle. Observe several cycles. [/LIST]Does the OSS output voltage rise and fall as specified? Yes No REPLACE PCM (REFER to Section 2, [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_4856/V32~us~en~file=V322011.htm~gen~ref.htm"]Flash Electrically Erasable Programmable Read Only Memory (EEPROM) [/URL]). REPLACE OSS sensor. REFER to the workshop manual group for manual transmissions. c-1107 [URL]https://acrobat.com/#d=Sw9kVG25q1j*96G3kaXMeg[/URL] c-1148 [URL]https://acrobat.com/#d=BqozZA2ixs02PrqPDSFuAQ[/URL] connector location...1107/1148 [URL]https://acrobat.com/#d=V92tMcdSMaKvDopeHUjWyA[/URL] instrument cluster testing and codes [url]https://acrobat.com/#d=55gJG8oS8SZS3bQqY411pA[/url] if you have a multi meter you should be able to find if you have a short.. [/QUOTE]
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Driveline
need help problems with P0720 Output Shaft Speed Sensor circuit
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