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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Hybrid/EV Control System) >> Diagnostic Information and Procedures >> DTC P0335 or P0336: Crankshaft Position Sensor >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Vehicle OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down.
  2. Disconnect the X2 harness connector at the K20 ECM.
  3. Using the EL 35616  terminal test kit, connect the EL 38522  variable signal generator red lead to the Crankshaft 60X Sensor Signal circuit terminal 42 at the harness. Connect the EL 38522  variable signal generator black lead to ground.
  4. Set the EL 38522  variable signal generator SIGNAL to 12v, FREQUENCY to 30 Hz and DUTY CYCLE to NORMAL, 50 percent. Plug power cord in to vehicle being tested or another power source.
  5. Vehicle ON.
  6. Verify with a scan tool the hybrid/EV powertrain control module Crankshaft Position Resync Counter parameter displays a constantly changing value.
    NOTE: With the variable signal generator set at 30 Hz, the Crankshaft Position Resync Counter should cycle from 0 - 255 in 8.5 seconds.
    • If parameter does not display a constantly changing value 
    1. Vehicle OFF, disconnect EL 38522  variable signal generator red and black leads, disconnect the X1 harness connector at the T6 power inverter module, vehicle ON.
    2. Test for less than 1 V between the signal circuit terminal 29 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    3. Vehicle OFF.
    4. Test for infinite resistance between the signal circuit terminal 29 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    5. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the T6 power inverter module.
    • If parameter displays a constantly changing value 
  7. Replace the K20 ECM.
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