Mazda CX 7. Manual — part 346
ON-BOARD DIAGNOSTIC [BCM]
09-02F–19
09-02F
Diagnostic procedure
End Of Sie
STEP
INSPECTION
ACTION
1
INSPECT FRONT DOOR LATCH AND LOCK
ACTUATOR (DRIVER-SIDE) CONNECTOR
• Disconnect the front door latch and lock
actuator (driver-side) connector.
• Inspect the front door latch and lock actuator
(driver-side) connector terminals for poor
connection (such as damaged/pulled-out
pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
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?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
3
INSPECT FRONT DOOR LATCH AND LOCK
ACTUATOR (DRIVER-SIDE) SIGNAL CIRCUIT
FOR SHORT TO GND
• Inspect for continuity between BCM terminal
5G (wiring harness-side) and body GND.
• Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to
GND, then go to Step 5.
No
Go to the next step.
4
INSPECT FRONT DOOR LATCH AND LOCK
ACTUATOR (DRIVER-SIDE)
• Inspect the front door latch and lock actuator
(driver-side).
(See 09-14-6 FRONT DOOR LATCH AND
LOCK ACTUATOR INSPECTION.)
• Is there any malfunction?
Yes
Replace the front door latch and lock actuator (driver-side),
then go to the next step.
(See 09-14-5 FRONT DOOR LATCH AND LOCK
ACTUATOR REMOVAL/INSTALLATION.)
No
Go to the next step.
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?
Yes
Replace the BCM.
(See 09-40-1 BODY CONTROL MODULE (BCM)
REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.
1871-1U-06B(09-02F).fm 19 ページ 2006年3月15日 水曜日 午前11時41分
ON-BOARD DIAGNOSTIC [BCM]
09-02F–20
DTC B2721[BCM]
id0902f5833300
Diagnostic procedure
End Of Sie
DTC B2721
Liftgate ajar output short to ground
DETECTION
CONDITION
Short to GND in wiring harness between BCM and liftgate latch switch
POSSIBLE
CAUSE
• Short to GND in wiring harness between BCM terminal 5P and liftgate latch switch terminal B
• Liftgate latch switch malfunction
• BCM malfunction
STEP
INSPECTION
ACTION
1
INSPECT LIFTGATE LATCH SWITCH
CONNECTOR
• Disconnect the liftgate latch switch
connector.
• Inspect the liftgate latch switch connector
terminals for poor connection (such as
damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
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?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
3
INSPECT LIFTGATE LATCH SWITCH SIGNAL
CIRCUIT FOR SHORT TO GND
• Inspect for continuity between BCM terminal
5P (wiring harness-side) and body GND.
• Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to
GND, then go to Step 5.
No
Go to the next step.
4
INSPECT LIFTGATE LATCH SWITCH
• Inspect the liftgate latch switch.
(See 09-14-10 LIFTGATE LATCH SWITCH
INSPECTION.)
• Is there any malfunction?
Yes
Replace the liftgate latch switch, then go to the next step.
(See 09-14-10 LIFTGATE LATCH AND LOCK ACTUATOR
REMOVAL/INSTALLATION.)
No
Go to the next step.
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?
Yes
Replace the BCM.
(See 09-40-1 BODY CONTROL MODULE (BCM)
REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.
BCM
LIFTGATE LATCH
SWITCH
A
5P
B
LIFTGATE LATCH SWITCH WIRING
HARNESS-SIDE CONNECTOR
BCM WIRING HARNESS-SIDE
CONNECTOR
5Q
5K
5B
5E
5H
5AC
5N
5Z
5T
5W
5G
5D
5A
5O
5AA
5U
5X
5Y
5V
5S
5P
5M
5AD
5AB
5I
5F
5J
5C
5L
5R
1871-1U-06B(09-02F).fm 20 ページ 2006年3月15日 水曜日 午前11時41分
ON-BOARD DIAGNOSTIC [BCM]
09-02F–21
09-02F
DTC B2982[BCM]
id0902f5838300
Diagnostic procedure
DTC B2982
Park brake switch circuit open
DETECTION
CONDITION
Open circuit in wiring harness between BCM and parking brake switch
POSSIBLE
CAUSE
• Open circuit in wiring harness between BCM terminal 1C and parking brake switch terminal A
• Parking brake switch malfunction
• BCM malfunction
STEP
INSPECTION
ACTION
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?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
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?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
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?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open
circuit, then go to Step 5.
4
INSPECT PARKING BRAKE SWITCH
• Inspect the parking brake switch.
(See 04-12-13 PARKING BRAKE SWITCH
INSPECTION.)
• Is there any malfunction?
Yes
Replace the parking brake switch, then go to the next step.
No
Go to the next step.
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?
Yes
Replace the BCM.
(See 09-40-1 BODY CONTROL MODULE (BCM)
REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.
A
PARKING BRAKE SWITCH
BCM
1C
A
PARKING BRAKE SWITCH WIRING
HARNESS-SIDE CONNECTOR
BCM WIRING HARNESS-SIDE
CONNECTOR
5Q
5K
5B
5E
5H
5AC
5N
5Z
5T
5W
5G
5D
5A
5O
5AA
5U
5X
5Y
5V
5S
5P
5M
5AD
5AB
5I
5F
5J
5C
5L
5R
1871-1U-06B(09-02F).fm 21 ページ 2006年3月15日 水曜日 午前11時41分
ON-BOARD DIAGNOSTIC [BCM]
09-02F–22
End Of Sie
DTC C1189[BCM]
id0902f5836600
Diagnostic procedure
End Of Sie
DTC C1189
Brake fluid level sensor input short to ground
DETECTION
CONDITION
Short to GND in wiring harness between BCM and brake fluid level sensor
POSSIBLE
CAUSE
• Short to GND in wiring harness between BCM terminal 1E and brake fluid level sensor terminal A
• Brake fluid level sensor input malfunction
• BCM malfunction
STEP
INSPECTION
ACTION
1
INSPECT BRAKE FLUID LEVEL SENSOR
CONNECTOR
• Disconnect the brake fluid level sensor
connector.
• Inspect the brake fluid level sensor
connector terminals for poor connection
(such as damaged/pulled-out pins, and
corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
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?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
3
INSPECT BRAKE FLUID LEVEL SENSOR
SIGNAL CIRCUIT FOR SHORT TO GND
• Inspect for continuity between BCM terminal
1E (wiring harness-side) and body GND.
• Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to
GND, then go to Step 5.
No
Go to the next step.
4
INSPECT BRAKE FLUID LEVEL SENSOR
• Inspect the brake fluid level sensor.
(See 04-11-11 BRAKE FLUID LEVEL
SENSOR INSPECTION.)
• Is there any malfunction?
Yes
Replace the brake fluid level sensor, then go to the next
step.
No
Go to the next step.
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?
Yes
Replace the BCM.
(See 09-40-1 BODY CONTROL MODULE (BCM)
REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.
BCM
BRAKE FLUID
LEVEL SENSOR
A
1E
B
B
A
1E
1G
1I
1K
1M
1O
1A
1C
1N
1L
1P
1H
1D
1B
1F
1J
BRAKE FLUID LEVEL SENSOR WIRING
HARNESS-SIDE CONNECTOR
BCM WIRING HARNESS-SIDE
CONNECTOR
1871-1U-06B(09-02F).fm 22 ページ 2006年3月15日 水曜日 午前11時41分
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