Cruise Control System: Other Dodge Cab & Chassis Dakota

To Set Speed Control

Press on/off button to turn cruise control on. Accelerate to desired speed (at least 35 MPH), and depress set/decel or set/coast button. Vehicle speed will be maintained.

To Disengage Speed Control

Depress brake pedal or clutch pedal. The on/off button may also be used, but set speed will be erased from memory. If clutch pedal is used to disengage cruise control, engine speed will increase before cruise control cuts out.

To Resume Previous Speed

If set speed has not been erased from memory and vehicle speed is more than 30 MPH, press resume/accel button.

To Increase Speed

With cruise control system on, increase set speed by pressing and releasing resume/accel button within one second. Each press and release of button will cause an increase of 2 MPH. For example, 3 presses would result in a speed increase of 6 MPH. To increase speed gradually, hold resume/accel button down until desire speed is reached. When button is released, new set speed will be maintained.

To Decrease Speed

With cruise control system on, decrease set speed by pressing set/decel or set/coast button. Vehicle speed will gradually decrease. Releasing button will set a new set speed as long as vehicle speed is still more than 35 MPH.

Note. Speed control system will automatically disengage when vehicle speed decreases to less than 35 MPH or increases to more than 85 MPH.

SERVICE PRECAUTIONS

Before proceeding with diagnosis, follow these precautions

1. Vehicle must have a fully charged battery and functional charging system.
2. Probe SBEC 60-pin connector from pin side. DO NOT backprobe SBEC connector.
3. DO NOT cause short circuits when performing electrical tests. This will set additional fault codes, making diagnosis of original problem more difficult.
4. Always repair lowest fault code number (CHECK ENGINE light) or first fault displayed (DRB-II) first.
5. Always perform «TEST SP-VER»(ref-27781-S15131197682001010800000) under SELF-DIAGNOSTIC TESTS after repairs are made.

CLEARING FAULT CODES

Note. Fault codes can also be cleared in READ FAULTS option of DRB-II. To ensure that all faults are read, use READ FAULTS option to erase fault codes. See DRB-II DIAGNOSTIC MODE under ENTERING ON-BOARD DIAGNOSTICS .

1. If DRB-II is not available, go to step 3). If DRB-II is available, enter SPEED CONTROL MENU. See DRB-II TEST FUNCTIONS. At SPEED CONTROL menu, press "5" (ADJUSTMENTS) key. Press ENTER key. At ADJUSTMENTS menu, press "1" (ERASE FAULTS) key. Press ENTER key.
2. DRB-II will display ERASE FAULTS ARE YOU SURE? (ENTER TO ERASE). Press ENTER key. When DRB-II is finished erasing fault codes, screen will display FAULTS ERASED.
3. If DRB-II is not available, fault codes may be cleared by disconnecting negative battery cable for at least 15 seconds, allowing SBEC to clear fault codes.

FAULT CODES

Note. For additional information of abbreviations please see the COMMONLY USED ABBREVIATIONS article in the GENERAL INFORMATION section.

FAULT CODES

Speed Control Menu

1. To perform cruise control system tests using DRB-II, DRB-II must be in SPEED CONTROL MENU. At SPEED CONTROL MENU, fault codes and DRB-II test functions can be accessed.
2. To reach SPEED CONTROL MENU, turn ignition off and connect DRB-II to engine diagnostic connector. Connector is located in engine compartment, near SBEC. Turn ignition switch to RUN position. NOTE: DO NOT touch DRB-II keypad during DRB-II power-up sequence or an error message will result.
3. All DRB-II character positions will glow and copyright information will appear on screen for a few seconds. If DRB-II screen is blank or any error messages appear, refer to DRB-II PROBLEMS & ERROR MESSAGES under DRB-II TEST FUNCTIONS in appropriate G - TEST W/CODES article in the ENGINE PERFORMANCE Section.
4. After a few seconds DRB-II menu will appear. At DRB-II menu, press "4" (SELECT SYSTEM) key. Press ENTER key. At SELECT SYSTEM menu, press "1" (ENGINE) key. Press ENTER key. DRB-II menu will appear indicating engine year, size, type of transmission and SBEC part number.
5. After a few seconds AIR COND menu will appear. Press "1" (WITH A/C) or press "2" (WITHOUT A/C). DRB-II display will change to ENGINE SYSTEMS menu. At ENGINE SYSTEMS menu, press "3" (SPEED CONTROL) key. Press ENTER key.
6. Display will change to SPEED CONTROL. At SPEED CONTROL MENU, specific test functions programmed into DRB-II can be performed. Following DRB-II modes can be accessed: SYSTEM TEST, READ FAULTS, STATE DISPLAYS, ACTUATOR TEST and ADJUSTMENTS.

Note. For more information on DRB-II test functions, see DRB-II TEST FUNCTIONS in appropriate G - TEST W/CODES article in the ENGINE PERFORMANCE Section.

NO CRUISE CONTROL WHEN SET BUTTON IS PRESSED & RELEASED

Fuse blown. No vacuum at servo. Speed control cable is disconnected. Brakelight switch out of adjustment. Faulty electrical circuit. Faulty neutral safety switch input to SBEC. Defective servo. Faulty SBEC.

CRUISE CONTROL ENGAGES WITHOUT ACTUATING CRUISE SET BUTTON

Faulty electrical circuit or control switch. Defective servo.

CRUISE CONTROL ENGAGES WHEN ENGINE IS STARTED

Faulty electrical circuit. Defective servo.

ERRATIC SPEED OR ENGINE SHUTS OFF

Poor engine performance (surge). Defective distance (speed) sensor. Vacuum leak. Faulty servo. Faulty SBEC.

CRUISE CONTROL DISENGAGES ON ROUGH ROAD

Brakelight switch out of adjustment. Faulty electrical circuit.

ENGINE DOES NOT RETURN TO NORMAL IDLE

Kinked or damaged cruise control cable. Faulty throttle linkage.

NO RESUME WHEN RESUME BUTTON IS PRESSED

Defective switch. Faulty electrical circuit.

CRUISE CONTROL DOES NOT DISENGAGE WITH BRAKE PEDAL DEPRESSED

Defective or improperly adjusted brakelight switch. Speed control cable is kinked or damaged. Faulty electrical circuit.

Dakota, Pickup, Ramcharger, RAM Van/Wagon

Remove cruise control switch. Using an ohmmeter, check cruise control switch. If cruise control switch does not test as specified, replace switch. See CRUISE CONTROL SWITCH (DAKOTA, PICKUP, RAMCHARGER, RAM VAN/WAGON) .

CRUISE CONTROL SWITCH (DAKOTA, PICKUP, RAMCHARGER, RAM VAN/WAGON)

Caravan, Town & Country, Voyager

Remove cruise control switch. Using an ohmmeter, check cruise control switch. If cruise control switch does not test as specified, replace switch. See CRUISE CONTROL SWITCH (CARAVAN, TOWN & COUNTRY, VOYAGER) .

CRUISE CONTROL SWITCH (CARAVAN, TOWN & COUNTRY, VOYAGER)