Mazda MX-6 1998, Workshop Manual

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TROUBLESHOOTING [SEAT BELT]
3 Seat belt warning light illuminates but warning buzzer does not sound
TROUBLESHOOTING HINTS
Malfunction in seat belt warning buzzer input signal circuit
© Seat belt warning buzzer does not sound
• CPU malfunction
• Malfunction in wiring harness between CPU and buckle switch
Malfunction in CPU power supply/ground circuit
(?) Seat belt warning buzzer does not sound
• Malfunction in wiring harness between METER 10 A fuse and CPU
• Malfunction in wiring harness between ROOM 15 A fuse and CPU
• Malfunction in wiring harness between CPU and ground
• ROOM 15 A fuse malfunction
STEP INSPECTION ACTION
Is ROOM 15 A fuse okay? Yes Go to next step.
No Replace fuse after repairing wiring harness.
Has seat belt warning buzzer sounded for 4 to
8
seconds since turning ignition switch to
ON?
Yes Seat belt warning system is okay.
No Go to next step.
Disconnect negative battery cable.
Remove driver’s side front scuff plate.
Remove driver’s side front side trim.
Remove nuts fixed in joint box and remove
CPU from joint box.
Connect negative battery cable.
Turn ignition switch to ON.
Measure voltage at terminal 1M at joint box of
wiring harness.
Is voltage B+?
Yes Go to next step.
No
Repair wiring harness between METER 10 A fuse and
CPU.
Measure voltage at terminal 1J at joint box of
wiring harness.
Is voltage B+?
Yes Go to next step.
No Repair wiring harness between ROOM 15 A fuse and joint
box.
0 8 -0 1 B -3