Key Interlock Unit Inspection

Turn the ignition switch to ON, and inspect terminal voltages, referring to the chart below.

If not as specified, repair the wiring harness and/or key interlock unit.

Fig 1: Identifying Key Interlock Harness Side Connector

Courtesy of MAZDA MOTORS CORP.

TERMINAL REFERENCE

Terminal	(-) terminal connected to	Condition	Correct measurement value (V)
A	G	For less than 2 seconds after ignition switch is turned to ACC or on with P position switch on.	Approx.0
A	G	Except above conditions	B+
C	G	P position switch is on, and ignition switch is turned to ACC or ON.	Approx.0
C	G	Except above condition	B+
G	Ground	Under any condition	Approx.0
K	G	P position switch is on.	Approx.0
K	G	P position switch is off.	B+
0	G	Ignition switch is at ON.	B+
0	G	Ignition switch is off.	Approx.0
P	G	Ignition switch is at ACC.	B+
P	G	Ignition switch is at position other than ACC.	Approx.0