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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 152 (Automatic Transmission - 4T80-E - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0961 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Key OFF. Using the Main Wiring Harness Connector Remover J 44257 , disconnect the automatic transmission (AT) inline 20-way connector.
  2. Install the jumper harness J 44152 (20 pins) on the engine side of the harness.
  3. Key ON, engine OFF.
  4. Using the BN probe J 35616-6, test for a diagnostic B+ (+0.0/-1.0 V) between the PC Solenoid Valve High Control circuit, jumper harness pin C and a good ground.
    • If the voltage tests less than the specified value, test the PC Solenoid Valve High Control circuit for an open/high resistance or a short to ground. If all circuits and connections test normal, test the TCM for proper operation.
  5. Using the BN probe J 35616-6, test for a diagnostic B+ (+0.0/-1.0 V) between the PC Solenoid Valve High Control circuit, jumper harness pin C and the PC Solenoid Valve Low Control circuit, jumper harness pin D.
    • If the voltage tests less than the specified value, test the PC Solenoid Valve Low Control circuit for an open/high resistance, short to ground or short to voltage. If all circuits and connections test normal, test the TCM for proper operation.
  6. Using the BN probe J 35616-6, connect a test light between the PC Solenoid Valve High Control circuit, jumper harness pin C and a good ground. The test light should NOT illuminate or illuminate dully.
    • If the test light illuminates brightly, test the PC Solenoid Valve High Control circuit for a short to voltage. If all circuits and connections test normal, test the TCM for proper operation.
  7. Using the BN probe J 35616-6, connect a test light between the PC Solenoid Valve Low Control circuit, jumper harness pin D and the Ignition Voltage circuit, jumper harness pin E. The test light should NOT illuminate.
    • If the test light illuminates brightly, test the PC Solenoid Valve Low Control circuit for a short to ground. If all circuits and connections test normal, test the TCM for proper operation.
  8. Remove the jumper harness J 44152 (20 pins) from the engine side of the harness and install it on the transmission 20-way pass-thru connector.
  9. Using the BN probes J 35616-6, test for 2-8 Ω between PC Solenoid Valve High Control circuit, jumper harness pin C and the PC Solenoid Valve Low Control circuit, jumper harness pin D.
    • If the resistance is greater than the specified range, test the affected circuits for an open/high resistance. If all circuits and connections test normal, test the PC Solenoid Valve for proper operation.
    • If the resistance is less than the specified range, test the affected circuit for a short together condition. If all circuits and connections test normal, test the PC solenoid Valve for proper operation.
  10. Using the BN probes J 35616-6, test for greater than 250K Ω between PC Solenoid Valve High Control circuit, jumper harness pin C and all other pins of the jumper harness except the PC Solenoid Valve Low Control circuit, jumper harness pin D.
    • If the resistance is less than the specified value, test the affected circuits for a shorted together condition. If all circuits and connections test normal, test the PC Solenoid Valve for proper operation.
  11. Using the BN probes J 35616-6, test for greater than 250K Ω between PC Solenoid Valve High Control circuit, jumper harness pin C and the transmission case.
    • If the resistance is less than the specified value, test the affected circuit for a short to the transmission case. If all circuits and connections test normal, test the PC Solenoid Valve for proper operation.
  12. Using the BN probes J 35616-6, test for greater than 250K Ω between PC Solenoid Valve Low Control circuit, jumper harness pin D and all other pins of the jumper harness except the PC Solenoid Valve High Control circuit, jumper harness pin C.
    • If the resistance is less than the specified value, test the affected circuits for a shorted together condition. If all circuits and connections test normal, test the PC Solenoid Valve for proper operation.
  13. Using the BN probes J 35616-6, test for greater than 250K Ω between PC Solenoid Valve Low Control circuit, jumper harness pin D and the transmission case.
    • If the resistance is less than the specified value, test the affected circuit for a short to the transmission case. If all circuits and connections test normal, test the PC Solenoid Valve for proper operation.
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