Pinpoint Test F: The Adaptive Cruise Control Does Not Function In Rain Or Snow Conditions

Cruise Control

Pinpoint Test F: The Adaptive Cruise Control Does Not Function In Rain Or Snow Conditions

Normal Operation

The adaptive cruise control system is enabled when the vehicle speed is set and the Cruise-Control Module (C-CM), which is a radar sensor unit, determines the distance and relative speed of the vehicle that is in the path of travel. The adaptive cruise control system has limited performance in rain and snow conditions. The radar sensor unit can be blocked or obstructed due to these types of weather conditions.

- DTC C1A67:97 (Forward Looking Sensor: Component Or System Obstructed Or Blocked)- set by the C-CM (Cruise-Control Module) as a continuous memory and on-demand DTC if the C-CM (Cruise-Control Module) detects an obstruction or if the sensor is blocked. This DTC may also set when the C-CM (Cruise-Control Module) does not see a vehicle or object on the road for an extended period.

This pinpoint test is intended to diagnose the following:

- C-CM (Cruise-Control Module)

- Blockage or obstruction

- Front bumper cover

- C-CM (Cruise-Control Module) foam

PINPOINT TEST F : THE ADAPTIVE CRUISE CONTROL DOES NOT FUNCTION IN RAIN OR SNOW CONDITIONS

F1 INSPECT THE FRONT BUMPER COVER FOR DAMAGE

- With the vehicle in NEUTRAL, position it on a hoist.

- Remove the front lower air defector.

- Inspect for damage on the front and back of the front bumper cover and C-CM (Cruise-Control Module) foam.

Is the front bumper cover damaged?

Yes
REPAIR or REPLACE the front bumper cover as necessary. CLEAR the DTCs. TEST the system for normal operation.

No
GO to F2.

F2 INSPECT THE C-CM (Cruise-Control Module) AND FRONT BUMPER COVER FOR DEBRIS, MOISTURE, SNOW OR ICE

- Inspect for debris, moisture, snow or ice on the front and back of the front bumper cover, C-CM (Cruise-Control Module) foam and sensor.

Is the C-CM (Cruise-Control Module) obstructed or blocked?

Yes
CLEAN the front bumper cover, C-CM (Cruise-Control Module) foam and radar sensor portion as necessary. CLEAR the DTCs. TEST the system for normal operation.

No
The system is operating normally at this time. This condition may have been cause by previous snow or water build up or the blockage message may occur when the C-CM (Cruise-Control Module) radar sensor unit has not seen an object or vehicle on the road for an extended period of time (approximately 5 minutes). CLEAR the DTCs. TEST the system for normal operation.