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HOMESERVICE MANUALSOLDSMOBILE2004BRAVADA AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 119 (ENGINE CONTROLS - SELF-DIAGNOSTICS - 2.2L)DIAGNOSTIC TESTSDTC P1275: ACCELERATOR PEDAL POSITION SENSOR 1 CIRCUITDIAGNOSTIC PROCEDURES
2004 Oldsmobile Bravada AWD

Diagnostic Procedures

2004 Oldsmobile Bravada AWDSECTION Diagnostic Procedures
WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: If DTC P1639 is also set, diagnose that DTC first. See DTC P1639: 5-VOLT REFERENCE 2 CIRCUIT  .
  1. Turn ignition on, engine off. Using scan tool, monitor APP SENSOR 1. If reading is less than 0.13 volt, go to next step. If voltage is more than 4.87 volts, go to step  6 . If voltage is 0.13-4.87 volts, problem is intermittent. See DIAGNOSTIC AIDS  .
  2. Disconnect APP sensor connector. Connect jumper wire between APP sensor connector terminals "D" (White/Black wire) and "E" (Dark Blue wire). If reading is more than 4.8 volts, check APP sensor connector. If connector is okay, replace APP sensor. If reading is not more than 4.8 volts, go to next step.
  3. Remove jumper. Using DVOM, measure voltage at APP sensor connector terminal "D" (White/Black wire). If voltage is 4-6 volts, go to next step. If voltage is not 4-6 volts, go to step  5 .
  4. Turn ignition off. Disconnect ECM J1 connector. Check continuity between APP sensor connector terminal "E" (Dark Blue wire) and ground. Check continuity between APP sensor connector terminals "E" (Dark Blue wire) and "K" (Brown wire). If continuity exists in either test, repair short between Dark Blue wire and ground or Brown wire. If continuity does not exist, check for open in Dark Blue wire. If wire is okay, replace ECM.
  5. Using scan tool, monitor MAP SENSOR and TP SENSOR 2. If both readings are both less than 0.2 volt, 5-volt reference 2 may be shorted to ground. See DTC P1639: 5-VOLT REFERENCE 2 CIRCUIT  . If both readings are not less than 0.2 volt, check Dark Blue wire for open between ECM and APP sensor. If wire is okay, replace ECM.
  6. Disconnect APP sensor. If reading is less than 0.13 volt, go to step  8 . If reading is not less than 0.13 volt, go to next step.
  7. Using DVOM, measure voltage at APP sensor connector terminal "E" (Dark Blue wire). If 4-6 volts are present, repair short between Dark Blue wire and White/Black wire or Purple wire. If 4-6 volts are not present, repair short to voltage in Dark Blue wire.
  8. Using DVOM, measure voltage between APP sensor connector terminals "D" (White/Black wire) and "K" (Brown wire). If 4-6 volts are present, replace APP sensor. If 4-6 volts are not present, go to next step.
  9. If voltage is more than 6 volts, 5-volt reference 2 is shorted to voltage. See DTC P1639: 5-VOLT REFERENCE 2 CIRCUIT  . If voltage is not more than 6 volts, check Brown wire for open between ECM and APP sensor. If wire is okay, replace ECM.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.