Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Saab >> 2011 >> 9-4X 3.0i, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Management And Fuel System, V6 >> Fault diagnosis, fault codes >> DTC P15A1: Fuel Economy Mode Switch Performance >> Circuit/System Testing

Circuit/System Testing

NOTE: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.
  1. Ignition OFF, disconnect the harness connector at the S87 Fuel Economy Mode switch.
  2. NOTE: It may take up to 2 minutes for all vehicle systems to power down.

    Ignition OFF, and all vehicle systems OFF, test for less than 5 Ω between ground circuit terminal 2 of the harness connector and ground.

  3. If greater than the specified value, test the ground circuit for an open/high resistance and repair as necessary.
  4. Test for 266-294 Ω between 5 V reference voltage circuit terminal 9 and signal circuit terminal 10 of the S87 fuel economy mode switch.
  5. If not the specified range, replace the S87 fuel economy mode switch.
  6. Test for 1, 414-1, 562 Ω between 5 V reference voltage circuit terminal 9 and ground circuit terminal 2 of the S87 fuel economy mode switch.
  7. If not the specified range, replace the S87 fuel economy mode switch.
  8. With the fuel economy mode switch button depressed, test for 486-538 Ω between 5 V reference voltage circuit terminal 9 and ground circuit terminal 2 of the S87 fuel economy mode switch.
  9. If not the specified range, replace the S87 fuel economy mode switch.
  10. Disconnect the X2 harness connector at the ECM.
  11. Test for less than 5 Ω between 5 V reference voltage circuit terminal 14 of the ECM harness connector and 5 V reference voltage circuit terminal 9 of the fuel economy mode switch harness connector.
  12. If greater than the specified value, repair the 5 V reference voltage circuit as necessary.
  13. Test for less than 5 Ω between signal circuit terminal 29 of the ECM harness connector and signal circuit terminal 10 of the fuel economy mode switch harness connector.
  14. If greater than the specified value, repair the signal circuit as necessary.
  15. If all circuits test normal, replace the K20 ECM.
scientia non olet · About Mike's Workshop Manuals