Trouble Code No. 16: Faulty ABS ECU Or "G" Sensor (Legacy 4WD M/T)
- Position vehicle on a flat surface. Unplug ABS ECU connector. See ACCESSING ABS ECU CONNECTOR. Using an ohmmeter, measure resistance between ABS ECU connector terminals No. 1 (Blue wire) and No. 16 (Yellow/Black wire). If resistance is 550-670 ohms, check ABS ECU input power supply at connector terminal No. 1 (Blue) for battery voltage. If power supply is okay, replace ABS ECU and retest.
- If reading is not 550-670 ohms between ABS ECU connector terminals No. 1 (Blue wire) and No. 16 (Yellow/Black wire), unplug "G" sensor connector. "G" sensor is located in engine compartment, below right shock tower, on frame rail. See Fig 1
. 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.
Courtesy of SUBARU OF AMERICA, INC.
- If reading is 550-670 ohms between "G" sensor terminals, check wiring between "G" sensor and ABS ECU by plugging in "G" sensor connector and turning ignition on. Using voltmeter, backprobe "G" sensor connector terminal No. 2 (Blue) and ground. Note reading. Using voltmeter, backprobe ABS ECU 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 ECU. Drive vehicle and retest system for any other trouble codes.
- Check all wheel sensors for physical damage, corrosion, opens and shorts. See TROUBLES CODES NO. 1-4.