Test K
PINPOINT TEST K: DTC C1799: EPB HALL EFFECT FAILURETests K1 - K4:
Tests K4 (continued) - K6:
Normal Operation
The EPB actuator contains a Hall-effect sensor, which the EPB module uses to determine how long the EPB motor is required to run during an application or release of the parking brake. The Hall-effect sensor receives power (approximately 2 volts below the battery voltage) from the EPB module through circuit 7-CG20 (YE/VT). Circuit 8-CG20 (WH/VT) provides a signal to the EPB module and this signal will vary between 0 and 4.4 volts when the EPB motor is rotating. The voltage varies due to the presence of a magnetic field, which is being detected by the Hall-effect sensor. Ground to the Hall-effect sensor is supplied by circuit 9-CG20 (BN/VT).
Possible Causes
^ circuit 7-CG20 (YE/VT) short to power, short to ground, open
^ circuit 8-CG20 (WH/VT) short to power, short to ground, open
^ circuit 9-CG20 (BN/VT) short to power, short to ground, open
^ EPB actuator
^ EPB module
CAUTION: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multimeter probes.