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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1370 (Automatic Transmission - 4L60-E - DTC P0218 To DTC P2771) >> DTC P182A, P182C-P182F, or P1915 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using the scan tool, does the IMS A/B/C/P parameter display HI/HI/HI/HI for each range selected.
    • If the IMS A/B/C/P parameter displays HI/HI/HI/HI for each range selected, repair the open in the IMS ground circuit.
  2. Turn OFF the ignition. Disconnect the automatic transmission inline 20-way connector. Additional DTCs may set. Turn ON the ignition, with the engine OFF. Observe the IMS A/B/C/P parameter on the scan tool. The parameter should display HI/HI.
    • If the IMS A/B/C/P parameter does not display HI/HI/HI/HI, repair the short to ground in the TR signal circuit that displayed LOW between the TCM and the automatic transmission 20-way inline connector.
  3. Turn OFF the ignition. Install the J 44152  jumper harness (20 pins), on the engine side of the automatic transmission inline 20-way connector. See Special Tools . Turn ON the ignition, with the engine OFF. Using the DMM and the J 35616  GM terminal test kit, measure the voltage at each of the TR signal circuits at the J 44152  . See Special Tools .
    • If the voltage is less than battery voltage, test the affected TR signal for an open between the TCM and the automatic transmission 20-way inline connector.
  4. Turn OFF the ignition. Install the J 44152  on the transmission side of the automatic transmission inline 20-way connector. See Special Tools . Measure the resistance for each TR signal circuit between the J 44152  circuit and the transmission case. See Special Tools . The resistance should be greater than 10 ohms.
    • If the resistance is less than 10 ohms, test the affected TR signal for a short to ground between the automatic transmission 20-way inline connector and the IMS switch.
  5. Connect the automatic transmission 20-way inline connector. Turn ON the ignition, with the engine OFF. Place the range selector in D3. Observe the IMS A/B/C/P parameter on the scan tool. The IMS A/B/C/P parameter should display LOW/LOW/LOW/LOW.
    • If any of the TR signal circuits do not display LOW when the range selector is placed in D3, test the affected TR signal for an open or high resistance between the automatic transmission 20-way inline connector and the IMS switch.
  6. If all circuits and connections test normal, test or replace the IMS switch.
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