DIAGNOSTIC PROCEDURE
DTC B1484 DIAGNOSTIC PROCEDURE TABLE
STEP
INSPECTION
ACTION
1
INSPECT ABS HU/CM
TO BRAKE SWITCH
FOR OPEN CIRCUIT
Turn the ignition
switch off.
Disconnect the ABS
HU/CM and brake
switch connector.
Inspect for continuity
ABS HU/CM terminal
N and brake switch
terminal D.
Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for
open circuit between ABS HU/CM and
brake switch, then go to the next step.
2
INSPECT BRAKE
SWITCH
Inspect the brake
switch.
(See
BRAKE
SWITCH
INSPECTION
.)
Is the brake switch
normal?
Yes
Go to the next step.
No
Replace the brake switch, then go to
the next step.
(See
BRAKE PEDAL
REMOVAL/INSTALLATION
.)
3
VERIFY
TROUBLESHOOTING
COMPLETED
Yes
Replace the ABS HU/CM, then go to
the next step.
(See
ABS HU/CM
REMOVAL/INSTALLATION
.)
2007 Mazda MX-5 Miata Sport
2007 BRAKES On-Board Diagnostic (ABS) - MX-5 Miata
Microsoft
Thursday, July 09, 2009 3:17:55 PM
Page 14
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