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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 354 (Engine Controls And Fuel - 3.6L (LGX) - DTC P0010 To DTC P0459) >> Diagnostic Information and Procedures >> DTC P0335 or P0336: Crankshaft Position Sensor >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems » Off
  2. Disconnect the electrical connector: B26 Crankshaft Position Sensor
  3. Test for less than 10 Ω between the test points: Low Reference circuit terminal 2 & Ground
    • If 10 Ω or greater 
    1. Disconnect the appropriate electrical connector: K20 Engine Control Module
    2. Test for less than 2 Ω between the test points: Low Reference circuit terminal 2 @Component harness & The other end of the circuit @Control module harness
      • If 2 Ω or greater » Repair the open/high resistance in the circuit.
      • If less than 2 Ω » Replace the component:K20 Engine Control Module
    • If less than 10 Ω 
  4. Ignition » On / Vehicle » In Service Mode
  5. Test for 4.8 to 5.2 V between the test points: 5 V Reference circuit terminal 1 & Ground
    • If less than 4.8 V 
    1. Ignition/Vehicle » Off
    2. Disconnect the appropriate electrical connector:K20 Engine Control Module
    3. Test for infinite resistance between the test points: 5 V Reference circuit terminal 1 @ Component harness & Ground
      • If less than infinite resistance » Repair the short to ground on the circuit.
      • If infinite resistance
    4. Test for less than 2 Ω between the test points: 5 V Reference circuit terminal 1 @ Component harness & The other end of the circuit @Control module harness
      • If 2 Ω or greater » Repair the open/high resistance in the circuit.
      • If less than 2 Ω » Replace the component:K20 Engine Control Module
    • If greater than 5.2 V 
    1. Ignition/Vehicle » Off
    2. Disconnect the appropriate electrical connector:K20 Engine Control Module
    3. Ignition » On / Vehicle » In Service Mode
    4. Test for less than 1 V between the test points:5V Reference circuit terminal 1 @Component harness & Ground
      • If 1 V or greater » Repair the short to voltage on the circuit.
      • If less than 1 V » Replace the component:K20 Engine Control Module
    • If between 4.8 and 5.2 V 
  6. Rapidly tap a 3 A fused jumper wire between the test points:Signal circuit terminal 1 & Ground

    Verify the scan tool parameter:Crankshaft Position Active Counter =Increments

    • If the parameter value does not increment 
    1. Ignition/Vehicle » Off
    2. Disconnect the appropriate electrical connector:K20 Engine Control Module
    3. Ignition » On / Vehicle » In Service Mode
    4. Test for less than 1 V between the test points:Signal circuit terminal 3 @Component harness & Ground
      • If 1 V or greater » Repair the short to voltage on the circuit.
      • If less than 1 V
    1. Ignition/Vehicle » Off
    2. Test for infinite resistance between the test points: Signal circuit terminal 3 @ Component harness & Ground
      • If less than infinite resistance » Repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω between the test points: Signal circuit terminal 3 @ Component harness & The other end of the circuit @Control module harness
      • If 2 Ω or greater » Repair the open/high resistance in the circuit.
      • If less than 2 Ω » Replace the component:K20 Engine Control Module
    • If the parameter value increments 
  7. Verify DTC P0336 is not set.
    • If the DTC is set 

      Verify the following conditions do not exist:

    • B26?Crankshaft Position Sensor Ring-Excessive play/Foreign material passing between the components/Incorrect air gap /Incorrect installation/Loose/Visual Damage
    • Camshaft Sprocket-Visual Damage /Worn
    • Camshaft Sprocket-Visual Damage /Worn
    • Engine Oil-Contaminated/Dirty
    • Timing ChainorTiming Belt-Visual Damage /Worn
    • Timing Chain TensionerorTiming Belt Tensioner-Visual Damage /Worn
      • If a condition exists » Repair or replace as necessary
      • If no condition exists»Test or replace the component:B26 Crankshaft Position Sensor
    • If the DTC is not set 
  8. Test or replace the component:B26 Crankshaft Position Sensor
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