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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 781 (Automatic Transaxle - 4T45-E - DTC P0218 To DTC P2764) >> DTC P1810, P1816, or P1818 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the automatic transmission (AT) 20-way connector at the transmission.
  2. Install the J 44152  on the transmission side of the AT 20-way connector. See Special Tools .
  3. Test the signal B circuit terminal R for less than 10 ohms of resistance with the transmission in park and infinite resistance with transmission in Drive.
    • If not the specified value, test the signal circuit for a short to ground, a short to voltage, or open/high resistance. If a circuit is shorted or open, replace the internal transmission wiring harness assembly, if the circuits test normal, replace the TFP switch.
  4. Test the signal C circuit terminal P for less than 10 ohms of resistance with the transmission in Drive and infinite resistance with transmission in Park.
    • If not the specified value, test the signal circuit for a short to ground, a short to voltage, or open/high resistance. If a circuit is shorted or open, replace the internal transmission wiring harness assembly, if the circuits test normal, replace the TFP switch.
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