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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 55 (Automatic Transaxle Diagnosis - 4T65-E) >> Diagnostic Tests >> DTC P1814: Torque Converter Overstress >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Buick Regal, 2002 Buick Century, 2001 Buick Regal, and 2001 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you perform the diagnostic system check? If so, go to next step. If not, see DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Install a scan tool. Turn ignition on, engine off. Before clearing the DTCs, use the scan tool to record the failure records for reference. Using the CLEAR INFO function will erase the stored failure records from the PCM. Record the failure records. Observe the failure counter in the failure records. Clear the DTCs. Does DTC P1814 failure counter indicate more than "1"? If so, go to step  4 . If not, go to next step.
  3. Inspect the transmission fluid level and color. See appropriate AUTOMATIC article in TRANSMISSION SERVICING. Is the inspection complete? If so, go to step  5 .
  4. Replace the transmission fluid. See appropriate AUTOMATIC article in TRANSMISSION SERVICING. Did you complete the repair? If so, go to next step.
    5. NOTE: These conditions must persist for at least 5 seconds.
  5. Perform the following procedure to verify the repair:
    • Select DTC.
    • Select CLEAR INFO.
    • Drive the vehicle with the range selector in D4.
    • The TCC slip must be 1500 RPM or less.
    • The throttle angle must be 50 percent or less.
    • The vehicle speed must be 7 MPH or less.
    • These conditions must exist for at least 5 seconds.
    • Select SPECIFIC DTC.
    • Enter DTC P1814.

    Has the test run and passed? If so, system is okay. If not, go to step  1 .

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