![\"2001-chevy-lumina\"](\"https:\/\/www.freeautomechanic.com\/mechanic\/forum\/wp-content\/uploads\/2020\/01\/2001-chevy-lumina.jpg\")
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When I try to drive my 2001 Chevy Lumina I can floor it and it hardly goes. Then kicks in and does this back and to. I got error code p1635 . Also have replaced the fuel filter, fuel pump, map sensor, IAC controller still doing same thing.<\/p>\n
The PCM uses the 5\u2009Volt Reference A circuit as a sensor feed to the following sensors:<\/p>\n
The PCM monitors the voltage on the 5\u2009Volt Reference A circuit. If the voltage is out of tolerance, the PCM will set DTC\u2009P1635.<\/p>\n
Conditions for Running the DTC<\/strong> Conditions for Setting the DTC<\/strong><\/p>\n Action Taken When the DTC Sets<\/strong><\/p>\n Conditions for Clearing the MIL\/DTC<\/strong><\/p>\n Diagnostic Aids<\/strong> NOTE<\/strong><\/em> If the condition is determined to be intermittent, reviewing the Snapshot or Freeze Frame\/Failure Records may be useful in determining when the DTC or condition was identified.<\/p>\n 2. NOTE<\/strong><\/em> The 5\u2009Volt Reference circuits have multiple PCM pins, be sure to test all components on the 5\u2009Volt Reference A circuits only.<\/p>\n 3. The 5\u2009Volt Reference circuits have multiple PCM pins, be sure to test all components on the 5 Volt Reference A circuits only.<\/p>\n 9. This vehicle is equipped with a PCM which utilizes an Electrically Erasable Programmable Read Only Memory (EEPROM). When the PCM is being replaced, the new PCM must be programmed.<\/p>\n DTC P1635 5 Volt Reference Circuit<\/b><\/p>\n \u00a0<\/p>\n 1<\/p>\n\u00a0<\/td>\n Did you perform the Powertrain On\u2013Board Diagnostic (OBD) System Check ?<\/p>\n\u00a0<\/td>\n \u2014<\/p>\n\u00a0<\/td>\n Go to Step 2<\/p>\n\u00a0<\/td>\n Go to Powertrain On Board Diagnostic (OBD) System Check<\/p>\n\u00a0<\/td>\n<\/tr>\n 2<\/p>\n\u00a0<\/td>\n Turn ON the ignition , Engine OFF.<\/p>\n<\/li>\n With a DMM, Measure the voltage from the 5\u2009Volt Reference circuit to a good ground.<\/p>\n<\/li>\n<\/ul>\n Does the voltage measure near the specified value?<\/p>\n\u00a0<\/td>\n 5.0\u2009V<\/p>\n\u00a0<\/td>\n Go to Step 5<\/p>\n\u00a0<\/td>\n Go to Step 3<\/p>\n\u00a0<\/td>\n<\/tr>\n 3<\/p>\n\u00a0<\/td>\n With a DMM observe the voltage while disconnecting all components connected to the 5\u2009Volt Reference circuit one at a time.<\/p>\n Does voltage change when one of the components is disconnected?<\/p>\n\u00a0<\/td>\n \u2014<\/p>\n\u00a0<\/td>\n Go to Step 8<\/p>\n\u00a0<\/td>\n Go to Step 4<\/p>\n\u00a0<\/td>\n<\/tr>\n 4<\/p>\n\u00a0<\/td>\n Does the voltage measure less than the specified value?<\/p>\n\u00a0<\/td>\n 4.9\u2009V<\/p>\n\u00a0<\/td>\n Go to Step 6<\/p>\n\u00a0<\/td>\n Go to Step 7<\/p>\n\u00a0<\/td>\n<\/tr>\n 5<\/p>\n\u00a0<\/td>\n Reconnect the component tested earlier.<\/p>\n<\/li>\n Test another 5\u2009Volt Reference circuit to a good ground.<\/p>\n<\/li>\n<\/ol>\n Does the voltage measure near the specified value?<\/p>\n\u00a0<\/td>\n 5.0\u2009V<\/p>\n\u00a0<\/td>\n Go to Step 9<\/p>\n\u00a0<\/td>\n Go to step 8<\/p>\n\u00a0<\/td>\n<\/tr>\n 6<\/p>\n\u00a0<\/td>\n Test all 5\u2009Volt Reference A circuits for a short to ground. Refer to Wiring Repairs<\/a> in Wiring Systems.<\/p>\n Did you find and correct the condition?<\/p>\n\u00a0<\/td>\n \u2014<\/p>\n\u00a0<\/td>\n Go to Step 10<\/p>\n\u00a0<\/td>\n Go to Step 9<\/p>\n\u00a0<\/td>\n<\/tr>\n 7<\/p>\n\u00a0<\/td>\n Test all 5\u2009Volt reference A circuit for a short to voltage. Refer Wiring Repairs<\/a> in Wiring Systems,<\/p>\n Did you find and correct the condition?<\/p>\n\u00a0<\/td>\n \u2014<\/p>\n\u00a0<\/td>\n Go to Step 10<\/p>\n\u00a0<\/td>\n Go to Step 9<\/p>\n\u00a0<\/td>\n<\/tr>\n 8<\/p>\n\u00a0<\/td>\n Replace the affected component. Refer to appropriate component replacement.<\/p>\n Did you complete the replacement?<\/p>\n\u00a0<\/td>\n \u2014<\/p>\n\u00a0<\/td>\n Go to Step 10<\/p>\n\u00a0<\/td>\n \u2014<\/p>\n\u00a0<\/td>\n<\/tr>\n 9<\/p>\n\u00a0<\/td>\n Replace PCM. Refer to Powertrain Control Module Replacement\/Programming.<\/p>\n Did you complete the replacement?<\/p>\n\u00a0<\/td>\n \u2014<\/p>\n\u00a0<\/td>\n Go to Step 10<\/p>\n\u00a0<\/td>\n \u2014<\/p>\n\u00a0<\/td>\n<\/tr>\n 10<\/p>\n\u00a0<\/td>\n Use the scan tool in order to clear the DTCs<\/p>\n Operate the Vehicle within the conditions for running the DTC as specified in the supporting text .<\/p>\n Does the DTC reset ?<\/p>\n\u00a0<\/td>\n \u2014<\/p>\n\u00a0<\/td>\n Go to Step 2<\/p>\n\u00a0<\/td>\n System OK<\/p>\n\u00a0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u00a0<\/p>\n \u00a0<\/p>\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":"
The ignition is ON.<\/p>\n\n
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Inspect for the following conditions:
Many situations may lead to an intermittent condition. Perform each inspection or test as directed.<\/p>\n
Important:<\/strong>
Remove any debris from the connector surfaces before servicing a component. Inspect the connector gaskets when diagnosing or replacing a component. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion.<\/p>\n\n
Test Description<\/strong>
The numbers below refer to the step numbers on the diagnostic table.<\/p>\n
Important:<\/strong>
DTC must have failed this ignition to be properly diagnosed.<\/p>\n\n\n
\n \nStep<\/th>\n Action<\/th>\n Value(s)<\/th>\n Yes<\/th>\n No<\/th>\n<\/tr>\n<\/thead>\n \n \n <\/a><\/h6>\n
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