Circuit/System Testing

• If 10 ohms or greater 

1. Disconnect the electrical connector: K20 Engine Control Module
2. Test for less than 2 ohms between the test points: Low Reference circuit terminal 2 @ Component harness & The other end of the circuit @ Control module harness
   • If 2 ohms or greater - Repair the open/high resistance in the circuit.
   • If less than 2 ohms - Replace the component: K20 Engine Control Module

• Go to next step: If less than 10 ohms 

• If less than 4.8 V 

1. Ignition/Vehicle - Off
2. Disconnect the 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.
   • Go to next step: If infinite resistance
4. Test for less than 2 ohms between the test points: 5 V Reference circuit terminal 1 @ Component harness & The other end of the circuit @ Control module harness
   • If 2 ohms or greater - Repair the open/high resistance in the circuit.
   • If less than 2 ohms - Replace the component: K20 Engine Control Module

• If greater than 5.2 V 

1. Ignition/Vehicle - Off
2. Disconnect the electrical connector: K20 Engine Control Module
3. Ignition - On/Vehicle - In Service Mode
4. Test for less than 1 V between the test points: 5 V 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

• Go to next step: If between 4.8 and 5.2 V 

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

• If the parameter value does not increment 

1. Ignition/Vehicle - Off
2. Disconnect the 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.
   • Go to next step: 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.
   • Go to next step: If infinite resistance
3. Test for less than 2 ohms between the test points: Signal circuit terminal 3 @ Component harness & The other end of the circuit @ Control module harness
   • If 2 ohms or greater - Repair the open/high resistance in the circuit.
   • If less than 2 ohms - Replace the component: K20 Engine Control Module

• Go to next step: If the parameter value increments 

• If the DTC is set 

NOTE:

The crankshaft position reluctor ring is magnetic and may be functionally damaged if any magnetic object comes in contact with it. This type of damage is not visually detectable but will set the DTC.

1. Verify the following conditions do not exist:
   • B26 Crankshaft Position Sensor & Reluctor Ring - Excessive play/Foreign material passing between the components/Incorrect air gap/Incorrect installation/Loose/Visible Damage
   • Camshaft Sprocket - Visible Damage/Worn
   • Crankshaft Sprocket - Visible Damage/Worn
   • Engine Oil - Contaminated/Dirty
   • Timing Chain or Timing Belt - Visible Damage/Worn
   • Timing Chain Tensioner or Timing Belt Tensioner - Visible Damage/Worn
   • If a condition exists - Repair or replace as necessary
   • Go to next step: If no condition exists
2. Replace the component: B26 Crankshaft Position Sensor
3. Clear the DTCs.
4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

   Verify the DTC does not set.

   • If the DTC sets - Replace the component: Crankshaft Position Reluctor Ring
   • Go to next step: If the DTC is not set
5. All OK.

• Go to next step: If the DTC is not set