E064

TEST CONDITIONS
1. Cruise control enabled;
2. Cruise control engaged.

FAILURE CONDITIONS
Vehicle speed increases more than 4 MPH in 1/4 second.

ACTION TAKEN
1. Disengage cruise control.

DESCRIPTION
Code EO64 is designed to set when the vehicle speed is increasing at an extremely rapid rate (wheelspin). It is a protective measure so that the wheels will not be under cruise control when on ice.

Notes on Intermittents
If code EO64 is stored as an intermittent code and the customer complains of frequent loss of cruise control, drive the car while observing ECM data ED12, vehicle speed. If the speed displayed is erratic, check the operation and integrity of the speed sensor circuit.

ECM CODE EO64 ACCELERATION TOO HIGH CRUISE ENGAGED
^ Code E64 sets when vehicle speed increases greater than 5 mph in one second with the cruise engaged.
^ IF Code E64 is set. cruise will disengaged and Code E64 will store in memory - no telltales are illuminated.
^ Most occurrences of code E64 are caused by wheelspin due to icy or wet conditions.
^ If Code E64 is found and no other cruise control faults exists, clear codes and road test. If Code E64 sets without wheelspin occurring. see "ECM REPLACEMENT CHECK", Chart C-1. Chart C-1 Vehicle Will Not Enter Diagnostics

WHEN ALL DIAGNOSIS AND REPAIRS ARE COMPLETED. CLEAR CODES AND VERIFY OPERATION