P0564
DTC P0564 CRUISE CONTROL MULTI-FUNCTION INPUT "A" CIRCUITGENERAL 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 ECM. When a signal from the control switch is input to the ECM while the vehicle is in state, the cruise control actuator is activated to operate the system. 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
ECM sets DTC P0564 if the ECM detects signal from switch exceeds threshold value.
DTC Detecting Condition:
MONITOR DTC STATUS
1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
2. Press F4 (DTAL) to select DTC information from the DTCs menu.
3. Confirm that "DTC Readiness Flag" indicates "Complete". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
4. Read "DTC Status" parameter.
5. Is parameter displayed "History (Not Present) fault"?
NOTE:
- History (Not Present) fault : DTC occurred but has been cleared.
- Present fault : DTC is occurring at present time.
YES - Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for loose or poor connections, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure
NO - Go to next step as below
POWER CIRCUIT INSPECTION
1. Ignition "OFF".
2. Disconnect multi-function switch connector.
3. Ignition "ON" & Engine "OFF".
4. Measure voltage between terminal 6 of the multi-function switch harness connector and chassis ground.
Specification : Approx. B+
5. Is voltage within the specification?
YES - Go to "Ground Circuit Inspection" procedure
NO - Check for an open or short to ground in the power circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
GROUND CIRCUIT INSPECTION
1. Ignition "OFF".
2. Reconnect multi-function switch harness connector.
3. Disconnect ECM harness connector.
4. Measure resistance between terminal 59 of the ECM harness connector and chassis ground.
Specification : Approx. 0 ohm
5. Is resistance within the specification?
YES - Go to "Control Circuit Inspection" procedure
NO - Check for an open or short to ground in the power circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
CONTROL CIRCUIT INSPECTION
1. Ignition "ON".
Specification:
2. Measure the voltage between terminal 58 of the ECM harness connector and chassis ground. "Refer to specification as below."
3. Is voltage within the specification?
YES - Go to next step as below
NO - Possibility of control circuit or component malfunction. Check open or short in the control circuit. Repair as necessary and go to "Verification of Vehicle Repair" procedure. If OK, go to next step as below.
TERMINAL AND CONNECTOR INSPECTION
1. Many malfunctions in the electrical system are caused by poor harness(es) 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
NO - Go to next step as below.
COMPONENT INSPECTION
1. Ignition "OFF".
Specification:
2. Measure cruise remocon switch resistance as follows. (Component side).
3. Is resistance within the specification?
YES - Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO - Substitute with a known-good cruise remote control switch and check for proper operation. If the problem is corrected, replace cruise remote control switch and then go to "Verification of Vehicle Repair" procedure.
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.