FixVault

Keyless Unit

Remove keyless unit from bracket behind glove box. SeeFigure . Leave keyless unit connector attached. Using DVOM, measure voltage at specified terminals of keyless unit connector (backprobe connector). SeeFig 1 . See KEYLESS UNIT CONNECTOR PIN VOLTAGES  . Disconnect keyless unit connector and check continuity at terminal "C" (ground). If voltage measurements or continuity are not as specified, check related components and wiring harnesses. If related components amd wiring harnesses are okay, but system is still not functioning properly, replace keyless unit.

Fig 1: Identifying Keyless Unit Connector Terminals
G97G11011Courtesy of MAZDA MOTORS CORP.
KEYLESS UNIT CONNECTOR PIN VOLTAGES

Terminal Desired Condition
"A" (15-Amp ROOM Fuse)
Constant 12V
"B" (CPU)
Harness Connector Disconnected 4.5-5.5
Harness Connector Reconnected (1)
"C" (Ground)
Constant Continuity
(1) From one volt to less than minimum voltage with harness connector disconnected.