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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Automatic Transmission - 5ET50 (MKE)) >> Diagnostic Information and Procedures >> DTC P0711-P0713: Transmission Fluid Temperature Sensor >> Circuit/System Testing

Circuit/System Testing

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  1. Vehicle OFF, disable the high voltage at the T6 Power Inverter Module. Refer to High Voltage Disabling .
    WARNING:

    Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

    The High Voltage Disabling procedure includes the following steps:

    • Identify how to disable high voltage.
    • Identify how to test for the presence of high voltage.
    • Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

    Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:

    • Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors.
    • Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
      • Visually and functionally inspect the gloves before use.
      • Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not.

    Failure to follow the procedures may result in serious injury or death.

  2. Remove the Control Valve Body Cover. Refer to Control Valve Body Cover Removal .
  3. Vehicle Off and all vehicle systems Off. Disconnect the X1 harness connector at the Q8 Control Solenoid Valve. It may take up to 2 min. for all vehicle systems to power down.
  4. Test for less than 10 Ω between the low reference circuit terminal 4 on the X1 harness connector and ground.
    • If 10 Ω or greater 
    1. Vehicle Off, disconnect the Automatic Transmission Wiring Harness (Control Solenoid Valve) harness connector at the T6 Power Inverter Module.
    2. Test for less than 2 Ω in the low reference circuit end to end.
      • If 2 Ω or greater, replace the Automatic Transmission Wiring Harness (Control Solenoid Valve).
      • If less than 2 Ω
    3. Replace the T6 Power Inverter Module.
    • If less than 10 Ω 
  5. Vehicle in Service Mode.
  6. Test for 4.8 - 5.2 V between the signal circuit terminal 3 and ground.
    • If not between 4.8 - 5.2 V 
    1. Ignition Off, disconnect the Automatic Transmission Wiring Harness (Control Solenoid Valve) harness connector at the T6 Power Inverter Module.
    2. Test for infinite resistance between the signal circuit terminal 3 and ground.
      • If less than infinite resistance, replace the Automatic Transmission Wiring Harness (Control Solenoid Valve).
      • If infinite resistance
    3. Test for less than 1 Ω in the signal circuit end to end.
      • If 1 Ω or greater, replace the Automatic Transmission Wiring Harness (Control Solenoid Valve).
      • If less than 1 Ω, replace the T6 Power Inverter Module.
    • If between 4.8 - 5.2 V 
  7. Replace the Q8 Control Solenoid Valve.
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