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Home >> Chevrolet >> 2021 >> Blazer RS, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls And Fuel - 2.5L (LCV) - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC P0010-P0014 or P2088-P2091 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
    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 appropriate electrical connector: Q6 Camshaft Position Actuator Solenoid Valve
  3. Test for less than 10 ohms between the test points: Low Reference circuit terminal 2/B & Ground
    • If 10 ohms or greater 
    1. Disconnect the appropriate electrical connector: K20 Engine Control Module
    2. Test for less than 2 ohms between the test points: Low Reference circuit terminal 2/B @ 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 
  4. Ignition - On / Vehicle - In Service Mode
  5. Perform the scan tool control function:
    • Exhaust Camshaft Position Actuator Solenoid Valve - Off
    • Intake Camshaft Position Actuator Solenoid Valve - Off

      Verify a test lamp does not turn On between the test points: Control circuit terminal 1/A & Ground

    • If the test lamp turns On 
    1. Ignition/Vehicle - Off & Remove - Test lamp
    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: Control circuit terminal 1/A @ 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 the test lamp does not turn On 
  6. Remove - Test Lamp
  7. Perform the scan tool control function:
    • Exhaust Camshaft Position Actuator Solenoid Valve - On
    • Intake Camshaft Position Actuator Solenoid Valve - On
    • Verify the scan tool parameter:
    • Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status = OK or Not Run
    • Intake Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status = OK or Not Run
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the appropriate electrical connector: K20 Engine Control Module
    3. Test for infinite resistance between the test points: Control circuit terminal 1/A @ Component harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: K20 Engine Control Module
    • Go to next step: If the specified state 
  8. Connect a 3 A fused jumper wire between the test points: Control circuit terminal 1/A & Ground
  9. Perform the scan tool control function:
    • Exhaust Camshaft Position Actuator Solenoid Valve - On
    • Intake Camshaft Position Actuator Solenoid Valve - On
    • Verify the scan tool parameter:
    • Exhaust Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status = Malfunction
    • Intake Camshaft Position Actuator Solenoid Valve Control Circuit Low Voltage Test Status = Malfunction
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the appropriate electrical connector: K20 Engine Control Module
    3. Test for less than 2 ohms between the test points: Control circuit terminal 1/A @ 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 specified state 
  10. Verify DTC P0011, P0014 is not set.
    • If the DTC is set 
    1. Ignition/Vehicle - Off
    2. Remove the component: Q6 Camshaft Position Actuator Solenoid Valve
    3. Verify a condition does not exist with the component: Q6 Camshaft Position Actuator Solenoid Valve
      • Engine Oil - Leaking @ Harness Connector
      • Screen - Misaligned/Missing/Restricted/Torn
      • Valve - Scored/Visible Damage
      • If a condition exists - Replace the component: Q6 Camshaft Position Actuator Solenoid Valve
      • Go to next step: If no condition exists
      4. NOTE:

      It may be necessary to use jumper wires if the connector indexing is different between the connectors.

    4. Swap the two components:
      • Q6E Camshaft Position Actuator Solenoid Valve - Exhaust
      • Q6F Camshaft Position Actuator Solenoid Valve - Intake
    5. Engine - Running
      6. NOTE:
      • This step is testing the mechanical camshaft position actuator for the camshaft that set the DTC.
      • Perform this test at the original location that set the DTC.
    6. Perform the scan tool control function:
      • Exhaust Camshaft Position Actuator - From 0 to 20° and back to 0°
      • Intake Camshaft Position Actuator - From 0 to 20° and back to 0°
      • Verify the scan tool parameter:
      • Exhaust Camshaft Position Variance = Less than 2° - During each of the commanded states
      • Intake Camshaft Position Variance = Less than 2° - During each of the commanded states
      • If 2° or greater - Replace the component: Camshaft Position Actuator
      • If less than 2° - Replace the component: Q6 Camshaft Position Actuator Solenoid Valve - The original component that set the DTC
    • Go to next step: If the DTC is not set 
  11. Test or replace the component: Q6 Camshaft Position Actuator Solenoid Valve
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