Mazda CX-7 2007 Workshop Manual page 1372

DTC B1506[BCM]
DTC B1506 Turn signal right circuit short to ground
DETECTION Short to GND in wiring harness between BCM and turn switch
CONDITION
• Short to GND in wiring harness between BCM terminal 3N and light switch terminal E
POSSIBLE
• Light switch malfunction
CAUSE
• BCM malfunction
LIGHT SWITCH WIRING
HARNESS-SIDE CONNECTOR
M
Q O
R P N
Diagnostic procedure
STEP
1 INSPECT LIGHT SWITCH CONNECTOR
• Disconnect the light switch connector.
• Inspect the light 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 LIGHT SWITCH SIGNAL CIRCUIT
FOR SHORT TO GND
• Inspect for continuity between following
terminals:
— BCM terminal 3N (wiring harness-side) —
body GND
• Is there continuity?
4 INSPECT LIGHT SWITCH
• Inspect the light switch.
• 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?
End Of Sie
09-02F–10
ON-BOARD DIAGNOSTIC [BCM]
LIGHT SWITCH
A
C
E
E C
K I A
L J H D B
F
INSPECTION
BCM
3L
3N
BCM WIRING HARNESS-SIDE
CONNECTOR
3W 3U 3S 3Q 3O 3M 3K
3X 3V 3T 3R 3P 3N 3L
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 short to
GND, then go to Step 5.
No Go to the next step.
Yes Replace the light switch, then go to the next step.
(See 09-18-14 LIGHT SWITCH INSPECTION.)
No Go to the next step.
Yes Replace the BCM.
(See 09-40-1 BODY CONTROL MODULE (BCM)
REMOVAL/INSTALLATION.)
No DTC troubleshooting completed.
id0902f5831600
3I 3G 3E 3C 3A
3J 3H 3F 3D 3B
ACTION