Mazda CX-7 2007 Workshop Manual page 1370

Diagnostic procedure
STEP
1 INSPECT FRONT DOOR SWITCH
(PASSENGER-SIDE) CONNECTOR
• Turn the ignition switch off.
• Disconnect the front door switch (passenger-
side) connector.
• Inspect the front door switch (passenger-
side) 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 FRONT DOOR SWITCH
(PASSENGER-SIDE) SIGNAL CIRCUIT FOR
SHORT TO GND
• Inspect for continuity between BCM terminal
5V (wiring harness-side) and body GND.
• Is there continuity?
4 INSPECT FRONT DOOR LATCH AND LOCK
ACTUATOR (PASSENGER-SIDE)
• Inspect the front door switch (passenger-
side).
(See 09-14-6 FRONT DOOR LATCH AND
LOCK ACTUATOR 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?
End Of Sie
DTC B1342[BCM]
DTC B1342 ECU is faulted
DETECTION BCM microcomputer malfunction
CONDITION
• BCM microcomputer malfunction
POSSIBLE
CAUSE
Diagnostic procedure
STEP
1 INSPECT DTC
• Clear the DTC from the BCM memory using
the M-MDS.
• Start the engine.
• Is the same DTC present?
End Of Sie
09-02F–8
ON-BOARD DIAGNOSTIC [BCM]
INSPECTION
INSPECTION
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 front door switch (passenger-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.
Yes Replace the BCM.
(See 09-40-1 BODY CONTROL MODULE (BCM)
REMOVAL/INSTALLATION.)
No DTC troubleshooting completed.
Yes Replace the BCM.
(See 09-40-1 BODY CONTROL MODULE (BCM)
REMOVAL/INSTALLATION.)
No DTC troubleshooting completed.
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