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Home >> Chevrolet >> 2022 >> Camaro LS, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 30 (Engine Controls And Fuel - 6.2L (LT1/LT4) - Diagnostic Information And Procedures (3 Of 3)) >> Diagnostic Information and Procedures >> Charge Air Cooler Coolant Pump Diagnosis >> 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 component:
    • {LT4, LT5} M10A Charge Air Cooler Coolant Pump 1
    • {LT5} M10B Charge Air Cooler Coolant Pump 2
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 4 & Ground
    • If 10 ohms or greater 
    1. Disconnect the appropriate ground connection:
      • {LT4, LT5} M10A Charge Air Cooler Coolant Pump 1G102
      • {LT5} M10B Charge Air Cooler Coolant Pump 2G101
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 4 & The other end of the circuit@Terminal G101, G102
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Ignition - On/Vehicle - In Service Mode
  5. Connect a test lamp between the test points:
    • Control circuit terminal 1 & Ground circuit terminal 4
    • Control circuit terminal 5 & Ground circuit terminal 4

      Verify the test lamp does not turn On.

    • If the test lamp turns On 
    1. Ignition/Vehicle - Off
    2. Disconnect the appropriate electrical connector: X50A Fuse Block - Underhood
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points:
      • Control circuit terminal 1@Component harness & Ground
      • Control circuit terminal 5@Component harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • If less than 1 VTest or replace the component: X50A Fuse Block - Underhood
    • Go to next step: If the test lamp does not turn On 
  6. Verify the fuse is not open:
    • {LT4, LT5} F38UA - M10A
    • {LT5} F86UA - M10B
    • If the fuse is open 
    1. Ignition/Vehicle - Off
    2. Replace the appropriate component: Fuse
    3. Ignition - On/Vehicle - In Service Mode
    4. Perform the scan tool control function: Charge Air Cooler Coolant Pump - ON

      Verify the fuse does not open.

      • If the fuse opens

        Repair the short to ground on the circuit.

      • If the fuse does not open

        Test or replace the component: M10 Charge Air Cooler Coolant Pump

    • Go to next step: If the fuse is not open 
  7. Perform the scan tool control function: Charge Air Cooler Coolant Pump - On and Off

    Verify the test lamp turns On and Off.

    • If the test lamp does not turn On and Off 
    1. Ignition/Vehicle - Off
    2. Disconnect the appropriate electrical connector: X50A Fuse Block - Underhood
    3. Test for less than 2 ohms between the test points:
      • Control circuit terminal 1@Component harness & The other end of the circuit@Fuse/Junction Block Harness
      • Control circuit terminal 5@Component harness & The other end of the circuit@Fuse/Junction Block Harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Test or replace the component: X50A Fuse Block - Underhood
    • Go to next step: If the component turns On and Off 
  8. Replace the appropriate component: M10 Charge Air Cooler Coolant Pump
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