Powertrain Verification Test VER-4

NOTE: If replacing Powertrain Control Module (PCM), the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into PCM to prevent Diagnostic Trouble Codes (DTC) from being stored in Controller Anti-Lock Brake (CAB) module and Air Bag Control Module (ACM).

Inspect vehicle to ensure all engine components are properly installed and connected. Reassemble and reconnect components as necessary. Go to next step.
Connect DRBIII® scan tool to Data Link Connector (DLC), if not previously done. Erase all DTCs. Go to next step.
If repair procedure included replacing PCM, go to next step. If repair procedure did not include replacing PCM, go to step 7.
If Powertrain Control Module (PCM) was replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into PCM to prevent Diagnostic Trouble Codes (DTC) from being stored in Controller Anti-Lock Brake (CAB) module and Air Bag Control Module (ACM). If vehicle is equipped with a Sentry Key Immobilizer Module (SKIM), secret key data must be updated to enable start.
For ABS and air bag systems, enter correct vehicle mileage and Vehicle Identification Number (VIN). Erase any DTC in ABS and air bag modules. Go to next step.
For SKIM theft alarm, using DRBIII®, select THEFT ALARM, SKIM, then MISC. Place SKIM in secured access mode by using appropriate PIN code for this vehicle. Select UPDATE SECRET KEY DATA. Data will be transferred from SKIM to PCM. Go to next step.
Turn speed control on (if equipped, CRUISE light will be on). Go to next step.
Road test vehicle at a speed greater than 35 MPH and depress and release SET switch. Verify speed control engages and holds set speed.
Depress and hold RESUME/ACCEL switch. Vehicle speed should increase by at least 2 MPH.
Depress and hold COAST switch. Vehicle speed should decrease.
Using caution, depress and release brake pedal. Speed control should disengage.
Bring vehicle speed back to greater than 35 MPH.
Depress and release RESUME/ACCEL switch. Vehicle should resume previously set speed.
Depress and hold SET switch. Vehicle should decelerate.
Release SET switch with vehicle speed greater than 35 MPH. Vehicle should adjust and set a new vehicle speed.
Depress and release CANCEL switch. Speed control should disengage.
Bring vehicle speed back to greater than 35 MPH and engage speed control.
Depress OFF switch to OFF. Cruise light will turn off. Speed control should disengage.
Following steps are for overshooting or undershooting of actual set speed, following a speed control set.
If vehicle operator repeatedly presses and releases the SET button with their foot off the accelerator (referred to as lift foot set), vehicle may accelerate and exceed desired set speed by up to 5 MPH.
Vehicle may also decelerate to less than desired set speed before finally achieving desired set speed.
Speed control system has an adaptive strategy that compensates for vehicle-to-vehicle variations in speed control cable lengths.
When speed control is set with operator's 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 speed control undershoot/overshoot condition will develop.
To "unlearn" the undershoot/overshoot condition, vehicle operator has to press and release the SET button while maintaining the desired set speed using the accelerator pedal (not decelerating or accelerating).
Next, set speed control switch to OFF position (or pressing CANCEL button if equipped) after waiting 10 seconds.
Procedure must be performed approximately 10-15 times to completely unlearn the undershoot/overshoot condition. If speed control passes all tests, test is complete. If speed control does not pass all tests, check for Technical Service Bulletins (TSB) that apply to symptom. Go to appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT for diagnosis by symptom.