LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 2008 >> Acadia SLT, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel - 3.6L - DTC P0335 To DTC P2138 >> DTC P0335 >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

  1. Disconnect the CKP sensor connector.
  2. Test for less than 1 ohm of resistance between low reference circuit and ground.
    • If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit and ground.
    • If less than the specified range, test the 5-volt reference circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the ECM.
    • If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  4. Ignition ON, test for 4.8-5.2 volts between the signal circuit and ground.
    • If less than the specified range, test the signal circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the ECM.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  5. Ignition ON, using a jumper wire connected to ground, momentarily touch the CKP sensor signal circuit repeatedly. The CKP Active Counter parameter should increment
    • If the CKP Active Counter parameter does not increment, replace the ECM.
scientia non olet · About LEMON Manuals