B671

Code B671 - Cruise - Servo Position Sensor Circuit:

Wiring Diagram for Codes B663, B667, B671, B672 & B673:

Circuit Description:

Code B671 will set, if the ignition is on, and the servo position sensor signal is below 3%. During the time the failure is present, the cruise control will be disengaged.



Test Description:

1. BCM data value BD70 displays servo position. The normal range is above 3%.

2. Checks to see if fault is due to short or open in the feedback circuits. Normal resistance across the feedback coil should be 15 to 30 ohms.

3. Checks to see if open circuit reading is due to servo or circuits.

4. Checks to see if problem is intermittent. BD70 will not go as low or high as BS05 because of its mechanical limits of travel; however, it should never go below 3%.


Note on Intermittents:

If an intermittent Code B671 is setting manipulate related wiring while observing BCM data BD70. If the failure is induced, the reading will jump from its normal value to a reading below 3%.