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Home >> Chevrolet >> 2011 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Engine Control System & Fuel System - 2.8L, 3.0L - DTC P1516 To DTC P2433) >> DTC P15A1 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
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.
  2. Ignition OFF, and all vehicle systems OFF, test for less than 5 Ω between ground circuit terminal 2 of the harness connector and ground.
    • If greater than the specified value, test the ground circuit for an open/high resistance and repair as necessary.
  3. 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.
    • If not the specified range, replace the S87 fuel economy mode switch.
  4. 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.
    • If not the specified range, replace the S87 fuel economy mode switch.
  5. 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.
    • If not the specified range, replace the S87 fuel economy mode switch.
  6. Disconnect the X2 harness connector at the ECM.
  7. 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.
    • If greater than the specified value, repair the 5 V reference voltage circuit as necessary.
  8. 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.
    • If greater than the specified value, repair the signal circuit as necessary.
  9. If all circuits test normal, replace the K20 ECM.
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