P0566

DTC P0566 Cruise Control Cancel Switch Signal




Circuit Description
The cruise control keeps the vehicle running at a fixed speed until a signal canceling this fixed speed is received.

When the main switch is turned on with the vehicle in the running mode, the battery voltage is applied to engine control module (ECM). When a signal from the control switch is input to ECM while the vehicle is in this state, the cruise control system is activated. Also, while the ECM is operating, the "CRUISE MAIN" indicator light in the meter assembly lights up.

When the cancel switch is "ON", cruise system is "OFF".

Conditions for Setting The DTC
Cruise main SW continuous ON time is more than 40 s.
- Engine speed is more than 500 rpm.
- Ignition voltage is more than 9.04 V.

Action Taken When the DTC Sets
- The ECM will not illuminate the malfunction indicator lamp (MIL).
- The ECM will store conditions which were present when the DTC was set in the Failure Records data only.

IMPORTANT: DTC is stored in memory as an historical data entry. If there is no freeze frame data, inspection is required. If no problems are discovered during inspection, clear the DTC data from memory.

Conditions for Clearing The MIL/DTC
DTC P0566 can be cleared using the Tech 2 "Clear Info" function or by disconnecting the ECM battery feed.

Diagnostic Aids
An intermittent may be caused by the following:
- Poor connections.
- Mis routed harness.
- Rubbed through wire insulation.
- Broken wire inside the insulation.

Check for the following conditions:
- Poor connection at ECM - Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.
- Damaged harness - Inspect the wiring harness for damage. If the harness appears to be OK, observe the cruise cancel switch display on the Tech 2 while moving connectors and wiring harnesses related to the sensor.

If it is determined that the DTC occurs intermittently, performing the DTC P0566 Diagnostic Chart may isolate the cause of the fault.

Step 1:

Steps 2 - 7:

Steps 8 - 9: