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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (Automatic Transmission - 4T80-E - DTC P0218 To DTC P2534) >> DTC P182A, P182C-P182F, or P1915 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the transmission 20-way harness connector.
  2. Ignition OFF, test the TCM side of the transmission 20-way harness connector for less than 5 ohms of resistance between the low reference circuit terminal K and ground.
    • If greater than the specified range test the low reference circuit for an open/high resistance.
  3. Ignition ON, verify that the affected IMS A/B/C/P parameter is HI.
    • If LOW test the TCM side of the 20-way harness connector signal circuit for a short to ground. If the circuit tests normal, replace the TCM.
  4. Install a 3-amp fused jumper wire between the signal circuit and the low reference circuit on the TCM side of the transmission 20-way harness connector. Verify the affected IMS A/B/C/P parameter is LOW.
    • Terminals F and K for IMS A.
    • Terminals G and K for IMS B.
    • Terminals H and K for IMS C.
    • Terminals J and K for IMS P.
    • If HI test the signal circuit of the affected IMS for a short to voltage or an open/high resistance. If the circuit tests normal, replace the TCM.
  5. If all circuits test normal, test or replace the internal transmission wiring harness or the internal mode switch.
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