C0245

C0245-WHEEL SPEED SENSOR FREQUENCY ERROR





The wheel speed sensor produces an AC voltage whose amplitude and frequency vary, depending upon the velocity of the wheel. The Electronic Brake And Traction Control Module (EBTCM) uses this voltage signal to calculate wheel speed. DTC C0245 will set when the EBTCM cannot specifically identify which wheel speed sensor is causing the malfunction. DTC C0245 will be in history and the DTC associated with the malfunctioning sensor will be set along with DTC C0245.

DTC PARAMETERS
DTC C0245 will set if:
^ The EBTCM detects a deviation between left and right rear wheel speeds greater than 6 km/h (3.75 mph) at a vehicle speed of less than 100 km/h (62 mph).
^ The EBTCM detects a deviation between left and right front wheel speeds greater than 10 km/h (6.25 mph) at a vehicle speed of less than 100 km/h (62 mph).
^ The EBTCM detects a deviation between left and right rear wheel speeds greater than 6% of vehicle speed at greater than 100 km/h (62 mph).
^ The EBTCM detects a deviation between left and right front wheel speeds of greater than 4 km/h plus 6% of vehicle speed at greater than 100 km/h (62 mph).

When DTC sets:
^ The ABS telltale will be On.
^ The EBTCM will disable ABS, Traction Control and Dynamic Rear Proportioning

DIAGNOSTIC AIDS
Inspect wiring, components and connectors for the following conditions:
^ Proper connection.
^ Backed-out terminals.
^ Broken connector locks.
^ Corrosion in connectors/terminals.
^ Damaged wire insulation.
^ Loose components.

Possible causes for DTC C0245:
^ The inline connectors at wheel speed sensors are the most likely areas for opens and shorts.
^ Damaged or missing teeth on the wheel speed sensor ring.
^ Large grooves or gouges, or build-LIP of foreign material in the gaps between the wheel speed sensor ring teeth.
^ A worn front hub bearing assembly or worn inner axle bearing which will allow for an excessive air gap.

When diagnosing intermittent conditions, use the Scan tool to observe parameters while test driving or wiggling a wire harness. Compare parameters with those on a known good system.