Dodge ZB 2005 Service Manual page 1338

Verification Tests —
POWERTRAIN VERIFICATION TEST VER - 4
1. Inspect the vehicle to ensure that all engine components are properly installed and
connected. Reassemble and reconnect components as necessary.
2. With the DRBIII , erase DTCs.
3. If the PCM was not replaced, skip steps 4 through 6, then continue with the verification.
4. If the PCM was replaced, the correct VIN and mileage must be programmed or a DTC will
set in the ABS and Air Bag modules.
5. In addition, start the vehicle 20 times after the module is replaced. After 20 starts, the new
PCM is in the proper in-field mode and will kill the fuel if it doesn't receive the VTA Status
J1850 message from the BCM.
6. For ABS and Air Bag systems: Enter correct VIN and Mileage in PCM. Erase codes in ABS
and Air Bag modules.
7. Turn the speed control ON (if equipped, cruise light will be on).
8. Depress and release the SET Switch when the vehicle speed is greater than 35MPH. The
speed control should engage and hold the selected speed.
9. Depress and hold the RESUME/ACCEL Switch. The vehicle speed should increase by at least
2 mph.
10. Press and hold the COAST switch. The vehicle speed should decrease.
11. Using caution, depress and release the brake pedal. The speed control should disengage.
12. Bring the vehicle speed back up to 35 MPH.
13. Depress the RESUME/ACCEL switch. The speed control should resume the previously set
speed.
14. Hold down the SET switch. The vehicle should decelerate.
15. Ensure vehicle speed is greater than 35 mph and release the SET Switch. The vehicle
should adjust and set a new vehicle speed.
16. Depress and release the CANCEL switch. The speed control should disengage.
17. Bring the vehicle speed back up above 35 mph and engage speed control.
18. Depress the OFF switch to turn OFF, (Cruise light will be off). The speed control should
disengage.
19. NOTE: OVERSHOOT/UNDERSHOOT FOLLOWING SPEED CONTROL SET.
20. 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 (8 km/h).
21. It may also decelerate to less than the desired set speed, before finally achieving the desired
set speed.
22. The Speed Control System has an adaptive strategy that compensates for vehicle-to-vehicle
variations in speed control cable lengths.
23. 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.
24. If the lift foot sets are continually used, a speed control overshoot/undershoot condition
will develop.
25. 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).
26. Then turning the cruise control switch to the OFF position (or press the CANCEL button if
equipped) after waiting 10 seconds.
27. This procedure must be performed approximately 10-15 times to completely unlearn the
overshoot/undershoot condition.
Did the Speed Control pass the above test?
Yes → Repair is complete.
→ Check for any related Technical Service Bulletins and/or refer to the
No
appropriate Symptom list (Diagnostic Procedure).
Continued
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VERIFICATION TESTS
APPLICABILITY
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