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Old 06-17-2005, 18:01   #1 (permalink)
JDK2005
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Cruise Control

My cruise control is not working in my 99 Explorer XLT. The dashboard
lights show that I set it, but then when I move my foot off the
accelerator, it starts losing speed.

Any ideas what could be wrong?

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Old 06-17-2005, 21:01   #2 (permalink)
ross via CarKB.com
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Re: Cruise Control

JDK2005 wrote:
>My cruise control is not working in my 99 Explorer XLT. The dashboard
>lights show that I set it, but then when I move my foot off the
>accelerator, it starts losing speed.
>
>Any ideas what could be wrong?


Here is the diagnostic routine for a 1999: Should be enough to fix it unless
you have a more involved problem


Extracting and Clearing Codes (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.



Enter Self-Test Diagnostics by depressing the speed control OFF switch while
turning the ignition key ON, ensuring engine does not start and is not
running. The speed control indicator lamp on the instrument panel will flash
once to indicate that the speed control module entered the diagnostic mode.
NOTE: Five additional flashes at this point indicate a defective speed
control servo.



Release the OFF switch.
Press the remaining switches in this sequence: ON, RSM (resume), CST (coast),
and SET/ACCEL. The speed control indicator lamp will flash as each switch is
pressed. Press each switch in the sequence immediately after the light goes
out for the previous switch.
NOTE: If the ON switch is not pressed within 5 seconds after entering the
diagnostic mode, the module times out and the procedure must be started over.



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 - Brake Pedal Position (BPP) switch is defective, circuit is
defective, or brake pedal is applied; Clutch Pedal Position (CPP) switch is
defective, circuit is defective, or clutch pedal is applied.
3 flashes - Brake deactivation switch is open or circuit is defective.
4 flashes - Vehicle speed signal is out of range or circuit is defective.
Immediately after the static test has passed, the speed servo will then
perform a dynamic test automatically by actuating the throttle lever from 1
mm to 10 mm of travel from the idle position. During the dynamic throttle
pull, observe the throttle movement to witness any binding or sticking of
actuator cable, proper connection of actuator cable to throttle lever, and
ensure throttle returns back to idle position. If improper connection and/or
binding or sticking of actuator is observed, go to Symptom Chart. See:
Symptom Chart
Return ignition switch to the OFF position and proceed to Symptom Chart. See:
Symptom Chart


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