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Electronic cruise control

When on cruise control mode the speed drops by 8 kms before the cruise control kicks in, especially when starting up an incline. Kind regards, Syrus.

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  • sudwadia Nov 22, 2013

    When on cruise control mode the speed drops by 8 kms before the cruise control kicks in, especially when starting up an incline. There is no error code coming up when the car is hooked up to the service computer.Kind regards, Syrus.

  • sudwadia Nov 22, 2013

    There is no error code coming up when the car is hooked up to the service computer.Kind regards, Syrus. Nov 22, 2013

  • sudwadia Nov 23, 2013

    when the car is travelling on cruise control mode on a flat road all is well, but then as soon as there is an incline & the cruise control is still active, the speed drops by 8km & then the cruise control kicks in again. This problem started after the transmission software was updated by the service engineers. For the first year all was well, but this issue happened after the second year service. I do know how to use the cruise control mode. Thanks.

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Sounds like you are letting your foot off the gas before
the cruise is complete try holding your foot on the gas until you know for sure the cruise has taken over.

Posted on Nov 23, 2013

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Posted on Jan 02, 2017

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SOURCE: My 2010 Chrysler Sebring convertible - after using the car for 18 months only, on a flat road the cruise control works very well. But even the slighteset uphill gradient, the speed drops by 8 kms &

If the cruise control actuator is vacuum controled I would be looking at a problem with the rubber hose.--cracxked , broken or hard and not sealing.. Cruise controls normally work with a less then 150rpm variation and respond when that setting is reached. Check that the cable is correctly adjusted of if cpu controlled that there is not a fault code reading

Posted on Feb 27, 2013

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cruise 2-hvxehrcewwphuchbcyrcpopp-5-2.jpg

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It's probably a problem with cruise control module , located under the hood in engine compartment . Or a bad connection somewhere . Do you know how to do electrical testing ? Is the air bag light lit on the instrument cluster ?

Could have DTC'S - diagnostic trouble code's stored .
DTC P1554
The powertrain control module (PCM) inhibits cruise control operation when certain conditions are not appropriate for cruise control operation. The PCM removes the ground from the cruise control inhibit signal circuit in order to disengage cruise control operation.
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Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions. However, steep grades may cause variations in the selected speeds. The electronic cruise control system has the capability to CRUISE, COAST, RESUME SPEED, ACCELERATE, and TAP-UP or TAP-DOWN.
The main parts of the cruise control system are:
• The cruise control module assembly
• The function control switches
• The cruise control release switch
• The clutch pedal position switch (CPP), if equipped
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The cruise control system uses the cruise control module assembly to maintain the desired vehicle cruise speed and operation. The cruise control module assembly has an electronic controller and an electric stepper motor to vary the throttle in each different cruise control mode. The electric controller monitors vehicle speed and operates the electric stepper motor. The stepper motor operates in response to the electronic controller, to maintain the desired cruise speed. The electric stepper motor moves a strap that is attached to the cruise control cable which moves the throttle linkage. The cruise control module assembly contains a low speed limit which will prevent system engagement below a minimum speed of 40 km/h (25 mph). The module assembly is not serviceable.

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My 2010 Chrysler Sebring convertible - after using the car for 18 months only, on a flat road the cruise control works very well. But even the slighteset uphill gradient, the speed drops by 8 kms &...


If the cruise control actuator is vacuum controled I would be looking at a problem with the rubber hose.--cracxked , broken or hard and not sealing.. Cruise controls normally work with a less then 150rpm variation and respond when that setting is reached. Check that the cable is correctly adjusted of if cpu controlled that there is not a fault code reading

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Did you have the recall done ?
recall 05S28. Description: Speed Control Deactivation Switch.

Try the self test for the Cruise Control :


With the key off depress and hold the cruise control off button while turning the ignition to the run position,don't start the truck, the cruise light will flash once to let you know it is in self test.
Five additional flashes indicate a bad cruise control servo

Release the cruise off switch and within 5 seconds depress the other switches in sequence:
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The speed control light will flash as each switch is depressed.

If the last one does not flash it may then flash a code

After this the cruise will move the throttle to test the actuator and the cable.
Make sure the throttle returns to idle and turn the key off.
----------------------

Self-Test Diagnostics

WARNING:
This test is a key on engine off (KOEO) test only that is conducted in park only with emergency brake fully engaged.

1. Enter self-test diagnostics by depressing the speed control OFF switch while turning the ignition key ON, making sure the engine does not start and is not running. The speed control indicator on the instrument panel will flash once to indicate that speed control module entered the diagnostic mode. Five additional flashes at this point indicate a defective speed control servo. Release the OFF switch.

2. Press the remaining switches in this sequence: ON, RESUME, COAST and SET/ACCEL.

If the ON switch is not depressed within five seconds after entering the diagnostics mode, the module times out and the procedure must be started over.

The speed control indicator lamp will flash as each switch is depressed. Press each switch in the sequence immediately after the indicator light goes out for the previous switch.

Note:
There will be a slight delay when the last button is pressed and the lamp flashes.

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If the lamp does not flash with the last button, and additional flashes occur, follow the chart below for trouble codes:

- 2 flashes - BPP defective, circuit is defective, brake applied, CPP switch or jumper (if equipped).

- 3 flashes - deactivator switch is open or circuit defective.

- 4 flashes - vehicle speed signal is out of range or circuit is defective

4. Immediately (.25 second delay) after the static test, the speed control servo does a dynamic test by automatically actuating the throttle lever from 8 mm (0.315 in) to 12 mm (0.472 in) of travel from the idle position. During the dynamic throttle pull, observe throttle movement to witness any binding or sticking of the speed control cable and correct connection of speed control cable to throttle lever. Make sure the throttle returns to the idle position.

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Did you have the recall for the cruise control done ?
recall 05S28. Description: Speed Control Deactivation Switch.

It could be the fuse in the recall harness is blown.

Try the Cruise Control Self test :
----------------------------------
Self-Test Diagnostics

WARNING:
This test is a key on engine off (KOEO) test only that is conducted in park only with emergency brake fully engaged.

1. Enter self-test diagnostics by depressing the speed control OFF switch while turning the ignition key ON, making sure the engine does not start and is not running. The speed control indicator on the instrument panel will flash once to indicate that speed control module entered the diagnostic mode. Five additional flashes at this point indicate a defective speed control servo. Release the OFF switch.

2. Press the remaining switches in this sequence: ON, RESUME, COAST and SET/ACCEL.

If the ON switch is not depressed within five seconds after entering the diagnostics mode, the module times out and the procedure must be started over.

The speed control indicator lamp will flash as each switch is depressed. Press each switch in the sequence immediately after the indicator light goes out for the previous switch.

Note:
There will be a slight delay when the last button is pressed and the lamp flashes.

3. A lamp flash with the last button (SET/ACCEL) indicates that the static test passed. If the lamp does not flash with the last button and there are no additional flashes of the lamp, the switch is defective.

If the lamp does not flash with the last button, and additional flashes occur, follow the chart below for trouble codes:

— 2 flashes - BPP defective, circuit is defective, brake applied, CPP switch or jumper (if equipped).

— 3 flashes - deactivator switch is open or circuit defective.

— 4 flashes - vehicle speed signal is out of range or circuit is defective

4. Immediately (.25 second delay) after the static test, the speed control servo does a dynamic test by automatically actuating the throttle lever from 8 mm (0.315 in) to 12 mm (0.472 in) of travel from the idle position. During the dynamic throttle pull, observe throttle movement to witness any binding or sticking of the speed control cable and correct connection of speed control cable to throttle lever. Make sure the throttle returns to the idle position.

5. Return the ignition switch to the OFF position and proceed to the Symptom Chart.
----------------------------

If the Cruise Control does not enter self test, the fuse in the recall harness ( if done ) is most likely blown and needs to be replaced.

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It sounds like you need the control unit under the hood

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The cruise control on my 1993 Honda Accord LX, automatic 4 cylinder works sometimes and sometimes not. It worked three days ago. It wouldn't work the next day. The following day it would. Now it won't...


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here are two switches that are the usual causes of the cruise kicking out. they are both under the dash. One is the switch for the brake lamps (stop light switch). the other is for the clutch if you have a manual transmission.

if you follow the brake pedal up under the dash you'll find two switches at the top of the pedal. (it may be one switch but I think its two). the top one would be for the cruise control. if the switch is loose it will cause the cruise control to think you're stepping on the brake and that will disengage the cruise control

same with the clutch pedal if you have a manual transmission; if the switch is loose it will indicate you are pushing the clutch pedal in and cause the cruise to kick out

other than that you'll have to check all of the connectors. If it does engage then the fuses and actuators should be good and it would be a loose connector or switch that's kicking it out

also, i assume your speedometer works; if its not then that's your problem as the cruise won't engage under 30 mph

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