Mazda CX-7 2007 Workshop Manual page 1383

DTC B2982[BCM]
DTC B2982 Park brake switch circuit open
DETECTION Open circuit in wiring harness between BCM and parking brake switch
CONDITION
• Open circuit in wiring harness between BCM terminal 1C and parking brake switch terminal A
POSSIBLE
• Parking brake switch malfunction
CAUSE
• BCM malfunction
PARKING BRAKE SWITCH WIRING
HARNESS-SIDE CONNECTOR
Diagnostic procedure
STEP
1 INSPECT PARKING BRAKE SWITCH
CONNECTOR
• Turn the ignition switch off.
• Disconnect the parking brake switch
connector.
• Inspect the parking brake switch connector
terminals for poor connection (such as
damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
2 INSPECT BCM CONNECTOR
• Disconnect the BCM connector.
• Inspect the BCM connector terminals for
poor connection (such as damaged/pulled-
out pins, and corrosion).
• Is there any malfunction?
3 INSPECT PARKING BRAKE SWITCH SIGNAL
CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between BCM terminal
1C (wiring harness-side) and parking brake
switch terminal A (wiring harness-side).
• Is there continuity?
4 INSPECT PARKING BRAKE SWITCH
• Inspect the parking brake switch.
(See 04-12-13 PARKING BRAKE SWITCH
INSPECTION.)
• Is there any malfunction?
5 VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the BCM memory using
the M-MDS.
• Perform the self-test.
(See 09-02F-26 BCM SELF-TEST[BCM].)
• Is the same DTC present?
ON-BOARD DIAGNOSTIC [BCM]
PARKING BRAKE SWITCH
A
A
INSPECTION
BCM
1C
BCM WIRING HARNESS-SIDE
CONNECTOR
5AB 5Y 5V 5S 5P 5M 5J
5AC 5Z 5W 5T 5Q 5N 5K
5AD 5AA 5X 5U 5R 5O 5L
Yes Repair or replace the terminal, then go to Step 5.
No Go to the next step.
Yes Repair or replace the terminal, then go to Step 5.
No Go to the next step.
Yes Go to the next step.
No Repair or replace the wiring harness for a possible open
circuit, then go to Step 5.
Yes Replace the parking brake switch, then go to the next step.
No Go to the next step.
Yes Replace the BCM.
(See 09-40-1 BODY CONTROL MODULE (BCM)
REMOVAL/INSTALLATION.)
No DTC troubleshooting completed.
id0902f5838300
5G 5D 5A
5H 5E 5B
5I 5F 5C
ACTION
09-02F–21
09-02F