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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Hybrid/EV System Heating And Cooling) >> Diagnostic Information and Procedures >> DTC P3064: Exhaust Heat Exchanger Exhaust Bypass Valve Position Sensor >> Circuit/System Testing

Circuit/System Testing

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  1. Vehicle OFF, disconnect the harness connector at the Q35 Exhaust Heat Exchanger Exhaust Bypass Valve.
  2. Test for less than 5 Ω between the ground circuit terminal 3 and ground.
    • If 5 Ω or greater 

      Repair the open/high resistance on the ground circuit.

    • If less than 5 Ω 
  3. Vehicle in Service Mode.
  4. Test for B+ between the B+ circuit terminal 1 and the ground circuit terminal 3.
    • If less than B+ 
    1. Vehicle OFF, test for infinite resistance between the B+ circuit terminal 1 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    2. Test for less than 2 Ω in the B+ circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω and the fuse is blown, replace the Q35 Exhaust Heat Exchanger Exhaust Bypass Valve.
    • If B+ 
  5. Test for 2 - 12V between the LIN serial data circuit terminal 2 and the ground circuit terminal 3.
    • If less than 2V 
    1. Ignition OFF, disconnect the X2 harness connector at the K114B Hybrid/EV Powertrain Control Module 2.
    2. Test for infinite resistance between the LIN serial data 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 LIN serial data circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the Hybrid/EV Powertrain Control Module 2.
    • If Greater than 12 V 
    1. Ignition OFF, disconnect the harness connector at the K114B Hybrid/EV Powertrain Control Module 2.
    2. Test for less than 1V between the LIN serial data circuit and ground.
      • If 1V or greater, repair the short to voltage on the circuit.
      • If less than 1V, replace the Hybrid/EV Powertrain Control Module 2.
    • If between 2 - 12 V 
  6. Replace the Q35 Exhaust Heat Exchanger Exhaust Bypass Valve.
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