LEMON Manuals: Even more car manuals for everyone
Home >> Oldsmobile >> 2001 >> Intrigue GL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0530: A/C Pressure Sensor >> Diagnostic Procedures

Diagnostic Procedures

  1. If air conditioning diagnostic system check has already been performed, go to next step. If powertrain diagnostic system check has not been performed, go to AIR CONDITIONING DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC SYSTEM CHECKS.
  2. Turn ignition off. Verify A/C compressor has free rotation. Start engine. Turn A/C system off. If A/C compressor clutch is engaged, diagnose A/C compressor clutch. See A/C COMPRESSOR CLUTCH CONTROLS article in AIR CONDITIONING & HEATING. If A/C clutch is not engaged, turn ignition off and go to next step.
  3. Turn ignition on. Using scan tool, select PCM data list and observe A/C high side pressure voltage parameter. If voltage is 0.1-4.9 volts, no problem is indicated at this time. See DIAGNOSTIC AIDS . If voltage is not 0.1-4.9 volts, go to next step.
  4. Turn ignition off. Disconnect A/C pressure sensor. Sensor is located in discharge hose of A/C compressor. Turn ignition on. Using scan tool, observe A/C high side pressure voltage parameter. If voltage is less than .1 volt, go to next step. If voltage is .1 volt or more, go to step  11.
  5. Turn ignition off. Connect a 3-amp fused jumper wire between terminals "B" (Gray wire) and "C" (Red/Black wire) at A/C pressure sensor harness connector. Turn ignition on. Using scan tool, observe A/C high side pressure voltage parameter. If voltage is more than 4.9 volts, go to next step. If voltage is 4.9 volts or less, go to step  9.
  6. Disconnect jumper wire. Measure voltage between terminals "A" (Black wire) and "B" (Gray wire) at A/C pressure sensor harness connector. If voltage is less than 5 volts, go to next step. If voltage is 5 volts or more, go to step  8.
  7. Turn ignition off. Disconnect negative battery cable. Measure resistance between ground and terminal "A" (Black wire) of A/C pressure sensor harness connector. If resistance is less than 5 ohms, go to step  13. If resistance is 5 ohms or more, go to step  12.
  8. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment, inside air filter housing. Measure voltage between ground and terminal "B" (Gray wire) of A/C pressure sensor harness connector. If any voltage is indicated, repair short to voltage in Gray wire between A/C pressure sensor and PCM. After repairs, go to step  17. If no voltage is indicated, go to step  14.
  9. Turn ignition off. Disconnect PCM connectors. PCM is located in left front corner of engine compartment, inside air filter housing. Check A/C pressure sensor 5-volt reference circuit (Gray wire) for an open or short to ground between terminal "B" at A/C pressure sensor harness connector and terminal No. 34 at PCM C1 harness connector. See Figure. If any problems are found, repair wiring as necessary. After repairs, go to step  17. If no problems are found, go to next step.
  10. Check A/C refrigerant pressure sensor signal circuit (Red/Black wire) for an open or short to ground between terminal "C" at A/C pressure sensor harness connector and terminal No. 27 at PCM C2 harness connector. If any problems are found, repair wiring as necessary. After repairs, go to step  17. If no problems are found, go to step  14.
  11. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment, inside air filter housing. Measure voltage between ground and terminal "C" (Red/Black wire) of A/C pressure sensor harness connector. If any voltage is indicated, repair short to voltage in Red/Black wire between A/C pressure sensor and PCM. After repairs, go to step  17. If no voltage is indicated, go to step  14.
  12. Turn ignition off. Disconnect PCM connectors. PCM is located in engine compartment, inside air filter housing. Check continuity of Black wire between terminal "A" at A/C pressure sensor harness connector and terminal No. 28 at PCM C1 harness connector. See Figure. If continuity does not exist, repair open in Black wire. After repairs, go to step  17. If continuity exists, go to step  14.
  13. Check for poor connections at A/C pressure sensor connector. Repair connector as necessary. After repairs, go to step  17. If connector is okay, go to step  15.
  14. Check for poor connections at PCM connectors. Repair connectors as necessary. After repairs, go to step  17. If connectors are okay, go to step  16.
  15. Replace A/C pressure sensor. After repairs, go to step  17.
  16. Replace PCM. Program replacement PCM. See PROGRAMMING . After repairs, go to next step.
  17. Turn ignition off. Reconnect all disconnected connectors. Turn ignition on. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine. Operate vehicle within conditions for running the DTC as specified in code enable criteria. If DTC runs and passes, go to next step. If DTC resets, go to step  2.
  18. Using scan tool, check for any other DTCs that are set. If no other DTCs are set, test is complete. If any other DTCs are set, repair DTCs as necessary. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
scientia non olet · About LEMON Manuals