Speed Control: Other Dodge Durango II

3/7L/4.7L Engine

The speed control system is operated by the use of a cable and a vacuum controlled servo. Electronic control of the speed control system is integrated into the Powertrain Control Module (PCM). The controls consist of two steering wheel mounted switches. The switches are labeled: ON/OFF, RES/ACCEL, SET, COAST, and CANCEL.

The system is designed to operate at speeds above 30 mph (50 km/h).

5.7L V-8 Engine

The speed control system is fully and electronically controlled by the Powertrain Control Module (PCM). A cable and a vacuum controlled servo are not used. This is a servo-less system. The controls consist of two steering wheel mounted switches. The switches are labeled: ON/OFF, RES/ACCEL, SET, COAST, and CANCEL.

The system is designed to operate at speeds above 30 mph (50 km/h).

3.7L / 4.7L Engines

Actual engine vacuum, a vacuum reservoir (1) equipped with a one-way check valve, and vacuum lines (3) and (4) are used to supply vacuum to the speed control servo.

Scheme 13

1. Remove rubber air tube between throttle body and air filter housing to gain access to speed control servo.
2. Disconnect vacuum hose at speed control servo and install a vacuum gauge into the disconnected hose.
3. Start engine and observe gauge at idle. Vacuum gauge should read at least ten inches of mercury.
4. If vacuum is less than ten inches of mercury, determine source of leak. Check vacuum line to engine (4) for leaks. Also check actual engine intake manifold vacuum. If manifold vacuum does not meet this requirement, check for poor engine performance and repair as necessary.
5. If vacuum line to engine is not leaking, check for leak at vacuum reservoir. Disconnect vacuum line at reservoir and connect a hand-operated vacuum pump to reservoir fitting. Apply vacuum. Reservoir vacuum should not bleed off. If vacuum is being lost, replace reservoir.
6. The reservoir (1) is equipped with an integral one-way check valve to retain a certain amount of vacuum within the reservoir. Verify operation of one-way check valve and check it for leaks.

5/7 Engine

Vacuum is not used for any part of the speed control system if equipped with a 5.7L V-8 engine.

1. Install end of cable to speed control servo. Refer to «SERVO-SPEED CONTROL»(ref-212802-S30226065132005122700000) .
2. Slide speed control cable plastic mount into throttle body bracket.
3. Install speed control cable connector onto throttle body bellcrank pin (push rearward to snap into location).
4. Slide throttle (accelerator) cable plastic mount into throttle body bracket. Continue sliding until cable release tab is aligned to hole in throttle body mounting bracket.
5. While holding throttle to wide open position, place throttle cable pin into throttle body bellcrank.
6. Install air intake tube to top of throttle body.
7. Connect negative battery cable at battery.
8. Before starting engine, operate accelerator pedal to check for any binding.