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Home >> Chevrolet >> 2011 >> Corvette ZR-1 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Automatic Transmission - 6L80-E - DTC P0562 Through DTC P0990) >> DTC P0850-P0852 >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF, disconnect the T12 automatic transmission assembly X1 connector.
  2. Install the DT-47825-10:  jumper harness to the X1 vehicle wire harness connector.
  3. Ignition OFF, test for less than 5 ohms between terminal 5 at the DT-47825-10:  jumper harness and ground at the transmission case.
    • If greater than the specified value, test the ground circuit for an open/high resistance.
  4. Ignition ON, test for 11-13 volts on terminal 3 at the DT-47825-10:  jumper harness and ground at the transmission case.
    • If not within the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
  5. Ignition OFF, disconnect the DT-47825-10:  jumper harness from the X1 vehicle harness connector.
  6. Connect the X1 vehicle harness connector to the Q8 control solenoid valve assembly.
  7. Remove the transmission fluid pan. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement .
  8. Disconnect the B15 automatic transmission internal mode switch electrical connector from the K71 TCM.
  9. Ignition ON, test for 11-13 volts between terminal F on the K71 TCM and ground at the transmission case.
    • If not within the specified range, replace the Q8 control solenoid valve assembly.
  10. If all circuits test normal, replace the B15 automatic transmission internal mode switch.
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