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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls And Fuel - 2.0L (LUZ) Diesel - DTC P0016 To DTC P0406) >> Diagnostic Information and Procedures >> DTC P0106: Manifold Absolute Pressure (MAP) Sensor >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
NOTE:
  • You must perform the Circuit/System Verification  before proceeding with the Circuit/System Testing.
  • You must perform the Diagnostic Repair Verification after completing the Circuit/System Testing.
  1. Verify the integrity of the entire air induction system by verifying that none of the following conditions exist:
    • A MAP Sensor seal that is leaking, missing or damaged
    • An intake manifold resonator with a leaking seal or a cracked or broken housing
    • A dirty or deteriorating air filter element
    • A leaking, loose, disconnected or cracked positive crankcase ventilation (PCV) valve, pipe or seal
    • Improper operation of the PCV system
    • A restricted or collapsed air intake duct
    • A misaligned or damaged air intake duct
    • Any objects blocking the air inlet probe of the mass air flow/intake air temperature sensor
    • Any contamination or debris on the sensing elements in the probe of the mass air flow/intake air temperature sensor
    • A cracked or damaged mass air flow sensor housing
    • Any water intrusion in the induction system
    • Any snow or ice build-up at the air cleaner, mass air flow or manifold absolute pressure sensors in cold climates
    • An intake manifold leak
    • If a condition exists 

      Repair as necessary.

    • If no condition exists 
  2. Ignition OFF and all vehicle systems OFF. It may take up to 2 min for all vehicle systems to power down. Disconnect the B74 Manifold Absolute Pressure Sensor.
  3. Test for less than 2 Ω between the low reference circuit terminal 1 and ground.
    • If 2 Ω or greater 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for less than 2 Ω in the low reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K20 Engine Control Module.
    • If less than 2 Ω 
  4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground.
    • If less than 4.8 V 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for infinite resistance between the 5 V reference circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the 5 V reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K20 Engine Control Module.
    NOTE: If the signal circuit is shorted to a voltage the ECM or the MAP Sensor may be damaged.
    • If greater than 5.2 V 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
    2. Ignition ON, test for less than 1 V between the 5 V reference circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K20 Engine Control Module.
    • If between 4.8-5.2 V 
  5. Verify the scan tool MAP Sensor voltage parameter is less than 0.2 V.
    • If 0.2 V or greater 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
    2. Ignition ON, test for less than 1 V between the signal circuit terminal 4 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K20 Engine Control Module.
    • If less than 0.2 V 
  6. Install a 3 A fused jumper wire between the signal circuit terminal 4 and the 5 V reference circuit terminal 3.
  7. Verify the scan tool MAP Sensor voltage parameter is greater than 4.5 V.
    • If 4.5 V or less 
    1. Ignition OFF, disconnect the harness connector at the K20 Engine Control Module.
    2. Test for infinite resistance between the signal circuit terminal 4 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open or high resistance in the circuit.
      • If less than 2 Ω, replace the K20 Engine Control Module.
    • If greater than 4.5 V 
  8. Test or replace the B74 Manifold Absolute Pressure Sensor.
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