3.
Has a problem been found?
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
▶ Go to " Component Inspection " procedure.
The cruise control system makes the vehicle drive at a fixed speed until a signal canceling this fixed speed is received. When the main switch is turned on, the battery voltage is applied to the PCM. When a signal from the control switch like Set or Resume switch while driving is input to the PCM, it controls the ETS motor to make a car go at a steady speed you want. Also, while the system is operating, "CRUISE" indicator lamp on cluster lights up.
If the SET swich signal is switching too frequently or stuck for too long, PCM sets P0568.
Item | Detecting Condition | Possible cause |
DTC Strategy | ● Monitors the switch is switching too frequently or stuck for too long. | ● Poor connection ● Faulty cruise switch ● Faulty PCM |
Enable Conditions | ● Engine is running ● Ignition voltage ≥ 9V ● Cruise control system type is learned | |
Threshold value | ● Input switch signal is switching too frequently or stuck | |
Diagnosis Time | ● Switching: more than 1 second failure for 300 seconds test ● Stuck: more than 75 seconds failure for 300 seconds test | |
MIL On Condition | ● NO MIL ON(DTC only) |
Item | Resistance(Ω) |
ON/OFF switch | 3.9 kΩ ± 5% |
SET switch | 220 Ω ± 5% |
RESUME switch | 910 Ω ± 5% |
CANCEL switch | 0 Ω ± 5% |
Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
▶ Go to " Component Inspection " procedure.
Check auto cruise switch
IG "OFF" and disconnect auto cruise switch connector.
Measure resistance between terminals 1 and 3 of auto cruise switch connector with "SET" switch depressed.(Component side)
Item | Resistance(Ω) | |||||
SET switch | 220 Ω ± 5% between terminals 1 and 3 | |||||
Is the measured resistance within specification?
▶ Substitute with a known - good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "Verification of Vehicle Repair" procedure.
▶ Substitute with a known - good auto cruise switch and check for proper operation. If the problem is corrected, replace auto cruise switch and go to "Verification of Vehicle Repair" procedure.
There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. After testing PCM on the vehicle, use this function to reuse the PCM on the others
After a repair, it is essential to verify that the fault has been corrected.
Monitor and record the Freeze Frame Data for the Diagnostic Trouble Code(DTC) which has been diagnosed.
Using a Scantool, Clear the DTCs.
Operate the vehicle within conditions noted in the freeze frame data or enable conditions.
Monitor that all rediness test have been verified as " Complete ".
Are any DTCs present ?
▶ Go to the applicable troubleshoooting procedure.
▶ System is performing to specification at this time.
