Faulty "G" Sensor
- Position vehicle on a flat surface. Disconnect ABS control unit harness connector. See Figure
. Using ohmmeter, measure resistance between ABS control unit connector terminals No. 1 and 16. See Figure
. If resistance is 550-670 ohms, check ABS control unit input power supply at harness connector terminal No. 2 and 16 for battery voltage. If battery voltage exists, replace ABS control unit and retest.
- If reading is not 550-670 ohms, unplug "G" sensor connector. "G" sensor is located in engine compartment, below right shock tower, on frame rail. See Figure
. Measure resistance between "G" sensor terminals. Ensure "G" sensor is mounted horizontally and vehicle is horizontal. If reading is not 550-670 ohms, replace "G" sensor.
- If reading is 550-670 ohms between "G" sensor terminals, check wiring between "G" sensor and ABS control unit. Connect "G" sensor harness connector. Turn ignition on. Using voltmeter, backprobe "G" sensor connector terminal No. 2 (Blue) and ground. Note reading. Using voltmeter, backprobe ABS control unit connector terminal No. 16 (Yellow/Black) to ground. Note reading.
- Both readings should be 10-12 volts. If readings are not as specified, repair wiring as required. If both readings are 10-12 volts, replace ABS control unit. Drive vehicle and retest system for any other trouble codes.
Courtesy of SUBARU OF AMERICA, INC.