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Home >> GMC >> 2011 >> Yukon Base, 5.3 3 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Hybrid/EV Control System) >> Diagnostic Information and Procedures >> DTC P181C-P181F, P183A-P183E, P184A, or P184B >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF. Disconnect the X176 24-way harness connector at the transmission.
  2. Install the DT-48493  jumper harness to the transmission side only.
  3. Disconnect the X1 16-way harness connector at the transmission.
  4. Install the DT-47825-10  jumper harness to the transmission side only.
  5. Transmission in PARK, test for less than 10 Ω between the low reference circuit terminal 5 at the transmission and each signal circuit terminal listed below at the transmission:
    • Terminal D2 X176
    • Terminal R2 X176
    • Terminal S X16
    • If not within the specified range, test the transmission internal extension harness signal circuit for an open/high resistance, if the circuit tests normal replace the automatic transmission internal B15 mode switch.
  6. Test for infinite resistance between the low reference circuit terminal 5 at the transmission and each signal circuit terminal listed below at the transmission:
    • Terminal D1 X176
    • Terminal R1 X176
    • If not the specified value, test the transmission internal extension harness signal circuit for a short to ground, if the circuit tests normal replace the automatic transmission B15 internal mode switch.
  7. Parking brake applied with the transmission in NEUTRAL, test for less than 10 Ω between the low reference circuit terminal 5 at the transmission and each signal circuit terminal listed below at the transmission:
    • Terminal D1 X176
    • Terminal R1 X176
    • If not within the specified range, test the transmission internal extension harness signal circuit for an open/high resistance, if the circuit tests normal replace the automatic transmission B15 internal mode switch.
  8. Test for infinite resistance between the low reference circuit terminal 5 at the transmission and each signal circuit terminals listed below at the transmission:
    • Terminal D2 X176
    • Terminal R2 X176
    • If not the specified value, test the transmission internal extension harness signal circuit for a short to ground, if the circuit tests normal replace the automatic transmission B15 internal mode switch.
  9. Transmission in REVERSE, test for infinite resistance between the low reference circuit terminal 5 at the transmission and the signal circuit terminal 3 X1 at the transmission.
    • If not the specified value, test the transmission internal extension harness signal circuit for an open/high resistance, if the circuit tests normal replace the automatic transmission B15 internal mode switch.