P0568

DTC P0568 Cruise Control SET Signal

Component Location:

General Description
The cruise control system keeps the vehicle running at a fixed speed until a signal canceling this fixed speed is received. When the main switch "AUTO CRUISE" is turned on with vehicle in the running mode, the battery voltage is applied to the PCM. When a signal from the control switch is input to the PCM while the vehicle is in state, the cruise control actuator is activated to operate the system the PCM controls the ETS motor to make a car go at a steady speed you want. Also, while the system is operating, "AUTO CRUISE" indicator lamp in the meter assembly lights up. In case of the cruise control system failure, the symptoms such as acceleration failure and vehicle speed setting failure will occur.

DTC Description
If the SET switch signal is switching too frequently or stuck for too long, PCM sets P0568.

DTC Detecting Conditions:

Specification:

Schematic Diagram:

Monitor DTC Status
1. Check DTC Status
(1) Connect scantool to Data Link Connector (DLC).
(2) IG "ON".
(3) Select "Diagnostic Trouble Codes (DTCs)" mode, and then Press F4 (DTAL) to check DTC's information from the DTC menu.





(4) Read "DTC Status" parameter.
(5) Is parameter displayed "Present fault"?

YES
1) Go to "Terminal and Connector inspection" procedure.

NO
1) Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, ending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure below.


Terminal and Connector Inspection
1. 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.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?

YES
- Repair as necessary and go to "Verification of Vehicle Repair" procedure below.

NO
- Go to " Component Inspection" procedure.

Component Inspection
1. Check auto cruise switch
(1) IG "OFF" and disconnect auto cruise switch connector.





(2) Measure resistance between terminals 6 and 7 of auto cruise switch connector with "SET" switch depressed (Component side).

A. Specification:

(3) Is the measured resistance within specification ?

YES
- 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 below.

NO
- 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 below.

NOTE: 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.

Verification of Vehicle Repair
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
2. Press F4 (DTAL) and confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
3. Read "DTC Status" parameter.
4. Is parameter displayed "History (Not Present) fault"?

YES
- System performing to specification at this time. Clear the DTC.

NO
- Go to the applicable troubleshooting procedure.