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Engine/Tuning
can someone tell me wtf happened?????????
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<blockquote data-quote="hotcobra03" data-source="post: 10149296" data-attributes="member: 53096"><p><strong>pintest du</strong></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>DU: Intake Air Temperature 2 (IAT2) </p><p><img src="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/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_556/V32~us~en~file=V325039.htm~gen~ref.htm" target="_blank"> DU: Introduction </a></p><p> </p><p><strong>DU10 DTC P1115: SIMULATE OPPOSITE SIGNAL TO PCM </strong></p><p></p><ul> <li data-xf-list-type="ul">With IAT2 temperature sensor disconnected, connect a jumper wire between the sensor signal and SIG RTN circuits at the temperature sensor harness connector.</li> <li data-xf-list-type="ul">Key on. <strong>Note: </strong>If a scan tool communication concern exists, remove jumper wire immediately and GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU12" target="_blank">DU12 </a>. </li> <li data-xf-list-type="ul">Access IAT2 temperature sensor voltage PID.</li> </ul><p>Is the IAT2 temperature sensor voltage PID less than 0.2 volts? </p><p>Yes No REPLACE suspect sensor. KEY OFF. REMOVE jumper wire. GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU11" target="_blank">DU11 </a>. </p><p><strong>DU11 CHECK TEMPERATURE SENSOR SIGNAL AND SIG RTN CIRCUITS FOR OPEN IN HARNESS </strong></p><p></p><ul> <li data-xf-list-type="ul"><strong>Note: </strong>Refer to the PCM connector pin numbers on this pinpoint test cover page. </li> <li data-xf-list-type="ul">Disconnect PCM.</li> <li data-xf-list-type="ul">Measure resistance of sensor signal circuit between PCM harness connector pin and IAT2 sensor harness connector.</li> <li data-xf-list-type="ul">Measure resistance of SIG RTN circuit between PCM harness connector pin and IAT2 temperature sensor harness connector.</li> </ul><p>Is each resistance less than 5.0 ohms? </p><p>Yes No REPLACE PCM (refer to Section 2, <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V322011.htm~gen~ref.htm" target="_blank">Flash Electrically Erasable Programmable Read Only Memory (EEPROM) </a>). REPAIR open circuits. </p><p><strong>DU12 CHECK TEMPERATURE SIGNAL FOR SHORT TO VREF IN HARNESS </strong></p><p></p><ul> <li data-xf-list-type="ul">Key off.</li> <li data-xf-list-type="ul">Disconnect PCM.</li> <li data-xf-list-type="ul">Measure resistance between IAT2 temperature signal circuit at the sensor harness connector and VREF circuits at the PCM harness connector.</li> </ul><p>Is the resistance greater than 10,000 ohms? </p><p>Yes No REPLACE PCM (refer to Section 2, <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V322011.htm~gen~ref.htm" target="_blank">Flash Electrically Erasable Programmable Read Only Memory (EEPROM) </a>). REPAIR short to VREF. </p><p><strong>DU20 P1114: SIMULATE OPPOSITE SIGNAL TO PCM </strong></p><p></p><ul> <li data-xf-list-type="ul">Disconnect harness from IAT2 temperature sensor.</li> <li data-xf-list-type="ul">Connect scan tool.</li> <li data-xf-list-type="ul">Key on.</li> <li data-xf-list-type="ul">Access IAT2 temperature sensor voltage PID.</li> <li data-xf-list-type="ul">Key off.</li> </ul><p>Is the IAT2 temperature sensor voltage PID greater than 4.2 volts? </p><p>Yes No REPLACE sensor. GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU21" target="_blank">DU21 </a>. </p><p><strong>DU21 CHECK VREF VOLTAGE TO TP SENSOR </strong></p><p></p><ul> <li data-xf-list-type="ul">Refer to schematic at the beginning of the pinpoint test.</li> <li data-xf-list-type="ul">Disconnect TP sensor.</li> <li data-xf-list-type="ul">Key on, engine off.</li> <li data-xf-list-type="ul">Measure the voltage between VREF and SIG RTN circuits at the TP sensor harness connector.</li> </ul><p>Is voltage between 4.0 and 6.0 volts? </p><p>Yes No There is sufficient VREF voltage. RECONNECT TP sensor. GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU22" target="_blank">DU22 </a>. KEY OFF. GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325006.htm~gen~ref.htm#pptC1" target="_blank">C1 </a>. </p><p><strong>DU22 CHECK TEMPERATURE SIGNAL CIRCUIT FOR SHORT TO GROUND IN HARNESS </strong></p><p></p><ul> <li data-xf-list-type="ul"><strong>Note: </strong>Refer to the PCM connector pin numbers on this pinpoint test cover page. </li> <li data-xf-list-type="ul">Disconnect PCM.</li> <li data-xf-list-type="ul">Measure resistance between sensor signal and SIG RTN circuits and then between sensor signal and PWR GND circuits at the PCM harness connector.</li> </ul><p>Is each resistance greater than 10,000 ohms? </p><p>Yes No REPLACE PCM (refer to Section 2, <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V322011.htm~gen~ref.htm" target="_blank">Flash Electrically Erasable Programmable Read Only Memory (EEPROM) </a>). REPAIR short circuit. </p><p><strong>DU30 P0127 IAT2 TOO HIGH. CHECK SUPERCHARGER INTERCOOLER PUMP OPERATION </strong></p><p></p><ul> <li data-xf-list-type="ul">Connect scan tool.</li> <li data-xf-list-type="ul">Access Output Test Mode.</li> <li data-xf-list-type="ul">Select Mode: ALL ON.</li> <li data-xf-list-type="ul">Command pump to run.</li> </ul><p>Does supercharger intercooler pump run? </p><p>Yes No GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU31" target="_blank">DU31 </a>. KEY OFF. GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325112.htm~gen~ref.htm#pptKP8" target="_blank">KP8 </a>(Charge Air Cooler Pump). </p><p><strong>DU31 CHECK INTERCOOLER SYSTEM </strong></p><p></p><ul> <li data-xf-list-type="ul">Check intercooler system for:<ul> <li data-xf-list-type="ul">low fluid level.</li> <li data-xf-list-type="ul">cracked coolant lines.</li> <li data-xf-list-type="ul">blocked heat exchanger or coolant lines.</li> <li data-xf-list-type="ul">crossed coolant lines.</li> </ul></li> </ul><p>Is intercooler system OK? </p><p>Yes No KEY OFF. GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU32" target="_blank">DU32 </a>. REPAIR as necessary. </p><p><strong>DU32 SIMULATE HIGH IAT2 VOLTAGE SIGNAL </strong></p><p></p><ul> <li data-xf-list-type="ul">Connect scan tool.</li> <li data-xf-list-type="ul">Key on.</li> <li data-xf-list-type="ul">Access IAT2 VPID.</li> <li data-xf-list-type="ul">Observe PID while disconnecting IAT2 sensor.</li> </ul><p>Is PID greater than 4.0V? </p><p>Yes No GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU33" target="_blank">DU33 </a>. REPLACE PCM (refer to Section 2, <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V322011.htm~gen~ref.htm" target="_blank">Flash Electrically Erasable Programmable Read Only Memory (EEPROM) </a>). </p><p><strong>DU33 SIMULATE LOW IAT2 VOLTAGE SIGNAL </strong></p><p></p><ul> <li data-xf-list-type="ul">Access IAT2 VPID.</li> <li data-xf-list-type="ul">Observe PID while connecting a jumper wire between the sensor signal and SIG RTN circuit at the temperature sensor harness connector.</li> </ul><p>Is PID less than 1.0V? </p><p>Yes No RECONNECT sensor and GO to <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~leftside=V32s6l.htm&rightside=V32s6r.htm&market=us&lang=en~gen~2col.htm" target="_blank">Section 6 </a>, Reference Values. COMPARE IAT2 PID to reference values under the given road test conditions. If sensor is not in range, REPLACE IAT2 sensor. REPLACE PCM (refer to Section 2, <a href="http://file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V322011.htm~gen~ref.htm" target="_blank">Flash Electrically Erasable Programmable Read Only Memory (EEPROM) </a>).</p></blockquote><p></p>
[QUOTE="hotcobra03, post: 10149296, member: 53096"] [b]pintest du[/b] 2003 PCED OBD SECTION 5: Pinpoint Tests Procedure revision date: 08/19/2002 DU: Intake Air Temperature 2 (IAT2) [IMG]file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=arrowbak.gif~gen~ref.gif[/IMG][URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325039.htm~gen~ref.htm"] DU: Introduction [/URL] [B]DU10 DTC P1115: SIMULATE OPPOSITE SIGNAL TO PCM [/B] [LIST] [*]With IAT2 temperature sensor disconnected, connect a jumper wire between the sensor signal and SIG RTN circuits at the temperature sensor harness connector. [*]Key on. [B]Note: [/B]If a scan tool communication concern exists, remove jumper wire immediately and GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU12"]DU12 [/URL]. [*]Access IAT2 temperature sensor voltage PID. [/LIST]Is the IAT2 temperature sensor voltage PID less than 0.2 volts? Yes No REPLACE suspect sensor. KEY OFF. REMOVE jumper wire. GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU11"]DU11 [/URL]. [B]DU11 CHECK TEMPERATURE SENSOR SIGNAL AND SIG RTN CIRCUITS FOR OPEN IN HARNESS [/B] [LIST][B]Note: [/B]Refer to the PCM connector pin numbers on this pinpoint test cover page. [*]Disconnect PCM. [*]Measure resistance of sensor signal circuit between PCM harness connector pin and IAT2 sensor harness connector. [*]Measure resistance of SIG RTN circuit between PCM harness connector pin and IAT2 temperature sensor harness connector. [/LIST]Is each resistance less than 5.0 ohms? Yes No REPLACE PCM (refer to Section 2, [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V322011.htm~gen~ref.htm"]Flash Electrically Erasable Programmable Read Only Memory (EEPROM) [/URL]). REPAIR open circuits. [B]DU12 CHECK TEMPERATURE SIGNAL FOR SHORT TO VREF IN HARNESS [/B] [LIST] [*]Key off. [*]Disconnect PCM. [*]Measure resistance between IAT2 temperature signal circuit at the sensor harness connector and VREF circuits at the PCM harness connector. [/LIST]Is the resistance greater than 10,000 ohms? Yes No REPLACE PCM (refer to Section 2, [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V322011.htm~gen~ref.htm"]Flash Electrically Erasable Programmable Read Only Memory (EEPROM) [/URL]). REPAIR short to VREF. [B]DU20 P1114: SIMULATE OPPOSITE SIGNAL TO PCM [/B] [LIST] [*]Disconnect harness from IAT2 temperature sensor. [*]Connect scan tool. [*]Key on. [*]Access IAT2 temperature sensor voltage PID. [*]Key off. [/LIST]Is the IAT2 temperature sensor voltage PID greater than 4.2 volts? Yes No REPLACE sensor. GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU21"]DU21 [/URL]. [B]DU21 CHECK VREF VOLTAGE TO TP SENSOR [/B] [LIST] [*]Refer to schematic at the beginning of the pinpoint test. [*]Disconnect TP sensor. [*]Key on, engine off. [*]Measure the voltage between VREF and SIG RTN circuits at the TP sensor harness connector. [/LIST]Is voltage between 4.0 and 6.0 volts? Yes No There is sufficient VREF voltage. RECONNECT TP sensor. GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU22"]DU22 [/URL]. KEY OFF. GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325006.htm~gen~ref.htm#pptC1"]C1 [/URL]. [B]DU22 CHECK TEMPERATURE SIGNAL CIRCUIT FOR SHORT TO GROUND IN HARNESS [/B] [LIST][B]Note: [/B]Refer to the PCM connector pin numbers on this pinpoint test cover page. [*]Disconnect PCM. [*]Measure resistance between sensor signal and SIG RTN circuits and then between sensor signal and PWR GND circuits at the PCM harness connector. [/LIST]Is each resistance greater than 10,000 ohms? Yes No REPLACE PCM (refer to Section 2, [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V322011.htm~gen~ref.htm"]Flash Electrically Erasable Programmable Read Only Memory (EEPROM) [/URL]). REPAIR short circuit. [B]DU30 P0127 IAT2 TOO HIGH. CHECK SUPERCHARGER INTERCOOLER PUMP OPERATION [/B] [LIST] [*]Connect scan tool. [*]Access Output Test Mode. [*]Select Mode: ALL ON. [*]Command pump to run. [/LIST]Does supercharger intercooler pump run? Yes No GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU31"]DU31 [/URL]. KEY OFF. GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325112.htm~gen~ref.htm#pptKP8"]KP8 [/URL](Charge Air Cooler Pump). [B]DU31 CHECK INTERCOOLER SYSTEM [/B] [LIST] [*]Check intercooler system for: [LIST] [*]low fluid level. [*]cracked coolant lines. [*]blocked heat exchanger or coolant lines. [*]crossed coolant lines. [/LIST] [/LIST]Is intercooler system OK? Yes No KEY OFF. GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU32"]DU32 [/URL]. REPAIR as necessary. [B]DU32 SIMULATE HIGH IAT2 VOLTAGE SIGNAL [/B] [LIST] [*]Connect scan tool. [*]Key on. [*]Access IAT2 VPID. [*]Observe PID while disconnecting IAT2 sensor. [/LIST]Is PID greater than 4.0V? Yes No GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V325040.htm~gen~ref.htm#pptDU33"]DU33 [/URL]. REPLACE PCM (refer to Section 2, [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V322011.htm~gen~ref.htm"]Flash Electrically Erasable Programmable Read Only Memory (EEPROM) [/URL]). [B]DU33 SIMULATE LOW IAT2 VOLTAGE SIGNAL [/B] [LIST] [*]Access IAT2 VPID. [*]Observe PID while connecting a jumper wire between the sensor signal and SIG RTN circuit at the temperature sensor harness connector. [/LIST]Is PID less than 1.0V? Yes No RECONNECT sensor and GO to [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~leftside=V32s6l.htm&rightside=V32s6r.htm&market=us&lang=en~gen~2col.htm"]Section 6 [/URL], Reference Values. COMPARE IAT2 PID to reference values under the given road test conditions. If sensor is not in range, REPLACE IAT2 sensor. REPLACE PCM (refer to Section 2, [URL="file:///C:/TSO/tsocache/VALUEDCUSTOM-PC_556/V32~us~en~file=V322011.htm~gen~ref.htm"]Flash Electrically Erasable Programmable Read Only Memory (EEPROM) [/URL]). [/QUOTE]
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