4WD Control Unit

Remove "B" pillar trim panel behind driver's seat, and locate control unit and connector. Turn ignition on. Measure pin voltages at control unit connector. See Fig 1 and Fig 2 . If voltage is not as specified, check system wiring circuits. If wiring circuits are okay, replace faulty component or control unit with a known-good unit.

Fig 1: Terminal Identification & Checking 4WD Control Unit Pin Voltages (1 Of 2)

Courtesy of MAZDA MOTORS CORP.

Fig 2: Checking 4WD Control Unit Pin Voltages (2 Of 2)

Courtesy of MAZDA MOTORS CORP.