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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T70 - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P0716 or P0717: Input Speed Sensor >> Circuit/System Testing

Circuit/System Testing

    NOTE:

    You must perform the Circuit/System Verification first.

  1. Ignition OFF, remove the control valve body cover.
  2. Connect the vehicle wire harness electrical connector to the Q8 Control Solenoid Valve Assembly electrical connector.
  3. Disconnect the B14C Transmission Input Shaft Speed Sensor wiring harness connector from the Q8 Control Solenoid Valve Assembly.
  4. Ignition ON.
  5. Test for 8.3-9.3V between the ISS sensor supply voltage circuit terminal A at the Q8 Control Solenoid Valve Assembly, and ground at the transmission case.
    • If not between 8.3-9.3V 
    1. Ignition OFF, disconnect the B14A Transmission Output Shaft Speed Sensor wiring harness connector from the Q8 Control Solenoid Valve Assembly. Ignition ON.
    2. Test for 8.3-9.3V between the OSS sensor supply voltage circuit terminal AX3 at the Q8 Control Solenoid Valve Assembly, and ground at the transmission case.
      • If not between 8.3-9.3V, replace the Q8 Control Solenoid Valve Assembly.
      • If between 8.3-9.3V, replace the B14A Transmission Output Shaft Speed Sensor.
    • If between 8.3-9.3V 
  6. Verify the scan tool Transmission ISS parameter is between 495-505 RPM when performing the input shaft speed test. Refer to Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test .
    • If not between 495-505 RPM 

      Replace the Q8 Control Solenoid Valve Assembly.

    • If between 495-505 RPM 
  7. Verify there is no damage to the reluctor, which is attached to the 4-5-6 clutch and 3-5-R clutch housing assembly, or misalignment between the B14C Transmission Input Shaft Speed Sensor and reluctor.
    • If the reluctor is damaged or misaligned 

      Repair or replace as necessary.

    • If the reluctor is not damaged or misaligned 
  8. Replace the B14C Transmission Input Shaft Speed Sensor.
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