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Home >> Dodge and Ram >> 2002 >> Durango Base, 5.9 Z, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - NGC >> Verification Tests >> Powertrain Verification Test VER-4
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Powertrain Verification Test VER-4

NOTE: After completing this Powertrain Verification Test, perform TRANSMISSION VERIFICATION TEST VER-1 (45RFE/545REF)  . If replacing the PCM, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into PCM to prevent DTCs from being stored in Controller Anti-Lock Brake (CAB) and Supplemental Restraint System (SRS) Air Bag Control Module (ACM). See POWERTRAIN CONTROL MODULE  under PROGRAMMING. If replacing PCM and vehicle is equipped with a Sentry Key Immobilizer Module (SKIM), secret key data must also be updated to enable engine starting. See SENTRY KEY IMMOBILIZER MODULE  under PROGRAMMING.
  1. Turn ignition off. Inspect vehicle to ensure all components related to the repair are properly connected. Turn the ignition on, with the engine off. With the DRBIII(R), clear DTCs.
    2. NOTE: If the vehicle operator repeatedly presses and releases the SET button with their foot off of the accelerator (referred to as "lift foot set"), the vehicle may accelerate and exceed the desired set speed by up to 5 mph It may also decelerate to less than the desired set speed, before finally achieving the desired set speed. The S/C System has an adaptive strategy that compensates for vehicle-to-vehicle variations in S/C cable lengths. When the speed control is set with the vehicles operators foot off of the accelerator pedal, the speed control thinks there is excessive speed control cable slack and adapts accordingly. If the "lift foot sets" are continually used, a S/C overshoot/undershoot condition will develop. To unlearn the overshoot/undershoot condition, the vehicle operator has to press and release the set button while maintaining the desired set speed using the accelerator pedal (not decelerating or accelerating). Then turning the cruise control switch to the OFF position (or pressing the CANCEL button) after waiting 10 seconds. This procedure must be performed approximately 10-15 times to completely unlearn the overshoot/undershoot condition.
  2. Turn Speed Control (S/C) On (CRUISE light should illuminate). Road test the vehicle. Depress and release the SET Switch when the vehicle speed is more than 35 MPH. The S/C should engage and hold the selected speed.
  3. Press and hold the RESUME/ACCEL Switch. The vehicle speed should increase by at least 2 MPH.
  4. Press and hold the COAST switch. The vehicle speed should decrease.
  5. Using caution, press and release the brake pedal. The speed control should disengage.
  6. Bring the vehicle speed back up to 35 MPH. Press the RESUME/ACCEL switch. The S/C should resume the previously set speed.
  7. Hold down the SET switch. The vehicle should decelerate. Ensure vehicle speed is more than 35 mph and release the SET Switch. The vehicle should adjust and set a new vehicle speed.
  8. Press and release the CANCEL switch. The speed control should disengage.
  9. Bring the vehicle speed back up more 35 mph and engage the S/C. Turn the S/C Off (CRUISE light will be off). The S/C should disengage.
  10. If operator repeatedly presses and releases the SET switch with their foot off the accelerator, vehicle may accelerate and exceed the desired set speed by up to 5 mph. It may also decelerate to less than the desired set speed before finally achieving the desired set speed. Speed control system has an adaptive strategy that compensates for variations in speed control cable lengths. When speed control is set with operator's foot off the gas, speed control thinks there is excessive cable slack and adapts accordingly. If operator repeatedly sets speed control with their foot off the accelerator, a speed control overshoot/undershoot condition will develope.
  11. To unlearn the overshoot/undershoot condition, press and release the SET button while maintaining the desired set speed with the accelerator pedal. Turn cruise control switch off (or press the CANCEL button if equipped) after waiting for 10 seconds. This procedure must be performed 10-15 times to completely unlearn the overshoot/undershoot condition.
  12. Did the Speed Control pass the above test? If yes, repair is complete. If no, with the DRBIII(R), read DTCs. Are any DTCs or symptoms remaining? If yes, check for any related Technical Service Bulletin (TSB) and/or perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  table under DIAGNOSTIC TROUBLE CODE DEFINITIONS.
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