Kia Forte: Trouble Symptom Charts
Trouble symptom
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Probable cause
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Remedy
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The set vehicle speed varies greatly upward or downward
"Surging" (repeated alternating acceleration and deceleration) occurs
after setting
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Malfunction of the vehicle speed sensor circuit
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Repair the vehicle speed sensor system, or replace the part
|
Malfunction of ECM
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Check input and output signals at ECM
|
Trouble symptom
|
Probable cause
|
Remedy
|
The CC system is not canceled when the brake pedal is depressed
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Damaged or disconnected wiring of the brake pedal switch
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Repair the harness or replace the brake pedal switch
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Malfunction of the ECM signals
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Check input and output signals at ECM
|
Trouble symptom
|
Probable cause
|
Remedy
|
The CC system is not canceled when the shift lever is moved
to the "N" position (It is canceled, however, when the brake pedal is depressed)
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Damaged or disconnected wiring of inhibitor switch input circuit
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Repair the harness or repair or replace the inhibitor switch
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Improper adjustment of inhibitor switch
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Malfunction of the ECM signals
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Check input and output signals at ECM
|
Trouble symptom
|
Probable cause
|
Remedy
|
Cannot decelerate (coast) by using the "SET/–" switch
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Temporary damaged or disconnected wiring of "SET/–" switch input
circuit
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Repair the harness or replace the "SET/–" switch
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Malfunction of the ECM signals
|
Check input and output signals at ECM
|
Trouble symptom
|
Probable cause
|
Remedy
|
Cannot accelerate or resume speed by using the "RES/+" switch
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Damaged or disconnected wiring, or short circuit, or "RES/+"
switch input circuit
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Repair the harness or replace the "RES/+" switch
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Malfunction of the ECM signals
|
Check input and output signals at ECM
|
Trouble symptom
|
Probable cause
|
Remedy
|
CC system can be set while driving at a vehicle speed of less
than 40km/h (25mph), or there is no automatic cancellation at that speed
|
Malfunction of the vehicle-speed sensor circuit
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Repair the vehicle speed sensor system, or replace the part
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Malfunction of the ECM signals
|
Check input and output signals at ECM
|
Trouble symptom
|
Probable cause
|
Remedy
|
The cruise main switch indicator lamp does not illuminate (But
CC system is normal)
|
Damaged or disconnected bulb of cruise main switch indicator
lamp
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Repair the harness or replace the part.
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Harness damaged or disconnected
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Component Parts And Function Outline
Component part
Function
Vehicle-speed sensor
Converts vehicle speed to pulse.
ECM
Receives signals fr ...
1. Remote control switch(LH)
2. Remote control switch(RH)
3. Bluetooth hands free switch
4. Trip switch
...
System Block Diagram
Cruise Control Switch Component Location