Mazda CX-7 2007 Workshop Manual page 1376

DTC B1566[BCM]
DTC B1566 Door ajar circuit short to ground
DETECTION Short to GND in wiring harness between BCM and door switches
CONDITION
• Short to GND in wiring harness between BCM terminal 5S and rear door switch (LH) terminal A
• Short to GND in wiring harness between BCM terminal 5T and rear door switch (RH) terminal A
POSSIBLE
• Rear door switch malfunction
CAUSE
• BCM malfunction
REAR DOOR SWITCH (LH)
REAR DOOR SWITCH (RH)
REAR DOOR SWITCH
HARNESS-SIDE CONNECTOR
Diagnostic procedure
STEP
1 INSPECT REAR DOOR SWITCH
CONNECTOR
• Turn the ignition switch off.
• Disconnect the rear door switch connector.
• Inspect the rear door 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 SLIDING DOOR SWITCH SIGNAL
CIRCUIT FOR SHORT TO GND
• Inspect for continuity between BCM terminal
5S, 5T (wiring harness-side) body GND.
• Is there continuity?
4 INSPECT REAR DOOR SWITCH
• Inspect the rear door switch.
(See 09-18-27 DOOR 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?
09-02F–14
ON-BOARD DIAGNOSTIC [BCM]
A
A
A
INSPECTION
BCM
5S
5T
BCM WIRING HARNESS-SIDE
CONNECTOR
5AB 5Y 5V 5S 5P 5M
5AC 5Z 5W 5T 5Q 5N
5AD 5AA 5X 5U 5R 5O
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 Repair or replace the wiring harness for a possible open
circuit, then go to Step 5.
No Go to the next step.
Yes Replace the rear door switch, then go to the next step.
(See 09-18-26 DOOR SWITCH REMOVAL/
INSTALLATION)
No Go to the next step.
Yes Replace the BCM.
(See 09-40-1 BODY CONTROL MODULE (BCM)
REMOVAL/INSTALLATION.)
No DTC troubleshooting completed.
id0902f5838200
5J 5G 5D 5A
5K 5H 5E 5B
5L 5I 5F 5C
ACTION