Mazda CX-9 Grand Touring. Manual — part 533

DIAGNOSTIC PROCEDURE

DTC B1311 - DIAGNOSTIC PROCEDURE

POSSIBLE CAUSE

door latch and lock actuator (passenger-side) terminal 2A



Open circuit in wiring harness between PLG control module terminal 3C and front
door latch and lock actuator (passenger-side) terminal 2B



Open circuit in wiring harness between front door latch and lock actuator
(passenger-side) terminal 2B and body GND



Door lock-link switch front door latch and lock actuator (passenger-side)
malfunction



PLG control module malfunction

STEP

INSPECTION

ACTION

1

INSPECT DOOR LOCK-LINK SWITCH



Disconnect the door lock-link switch
(Passenger side) connector.



Inspect the door lock-link switch
(Passenger side).

Yes Go to the next step.

No

Replace the front door latch and lock actuator.

(See FRONT DOOR LATCH AND LOCK

ACTUATOR

2008 Mazda CX-9 Grand Touring

2008 BODY & ACCESSORIES On-Board Diagnostic (Power Liftgate (PLG) System) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:46:08 AM

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© 2005 Mitchell Repair Information Company, LLC.

DTC B1318 [POWER LIFTGATE (PLG) SYSTEM]

DTC B1318 - DETECTION CONDITION POSSIBLE CAUSE CHART

(See FRONT DOOR LATCH AND
LOCK ACTUATOR INSPECTION .)



Is the door lock-link switch normal?

REMOVAL/INSTALLATION .)

Go to Step 3.

2

INSPECT THE FOLLOWING WIRING
HARNESSES



Disconnect the PLG control module
connector.



Disconnect the door lock-link switch
(Passenger side) connector.



Inspect the wiring harness between PLG
control module terminal 3N and front
door latch and lock actuator terminal 2A
for an open circuit.



Inspect the wiring harness between PLG
control module terminal 3C and front
door latch and lock actuator terminal 2B
for an open circuit.



Inspect the wiring harness between front
door latch and lock actuator terminal 2E
and body ground for an open circuit.



Are the wiring harnesses normal?

Yes Go to the next step.

No

Repair or replace the wiring harness.

Go to the next step.

3

VERIFY CORRECTION COMPLETED



Reconnect the disconnected connector.



Clear the DTC.



Is DTC B1311 displayed after 10 s or
more have elapsed.

Yes

Replace the PLG control module.
(See POWER LIFTGATE (PLG)
CONTROL MODULE
REMOVAL/INSTALLATION .)

No

DTC troubleshooting completed.

DTC B1318

Power supply voltage decreases

DETECTION

CONDITION

Input voltage from the battery is excessively low (below 10.5 V)

POSSIBLE CAUSE



PLG 20 A fuse malfunction



Open or short circuit in wiring harness between PLG control module terminal
1C and battery



Battery malfunction



Generator malfunction



PLG control module malfunction

2008 Mazda CX-9 Grand Touring

2008 BODY & ACCESSORIES On-Board Diagnostic (Power Liftgate (PLG) System) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:46:08 AM

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© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC B1318 - DIAGNOSTIC PROCEDURE

STEP

INSPECTION

ACTION

1

INSPECT BATTERY VOLTAGE



Inspect the battery voltage.

(See BATTERY INSPECTION [MZI-
3.7] .)



Is the battery voltage normal?

Yes Go to the next step.

No

Recharge or replace the battery.

Go to Step 4.

2

INSPECT FOR PCM DTCs



Connect the M-MDS to the DLC-2.



Are any DTCs for the PCM displayed?

Yes

Perform troubleshooting according to the
corresponding DTC inspection.
Go to Step 4.

No

Go to the next step.

INSPECT THE FOLLOWING WIRING
HARNESSES

2008 Mazda CX-9 Grand Touring

2008 BODY & ACCESSORIES On-Board Diagnostic (Power Liftgate (PLG) System) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:46:08 AM

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© 2005 Mitchell Repair Information Company, LLC.

DTC B1342 [POWER LIFTGATE (PLG) SYSTEM]

DTC B1342 - DETECTION CONDITION POSSIBLE CAUSE CHART

DIAGNOSTIC PROCEDURE

DTC B1342 - DIAGNOSTIC PROCEDURE

DTC B241A [POWER LIFTGATE (PLG) SYSTEM]

DTC B241A - DETECTION CONDITION POSSIBLE CAUSE CHART

3



Disconnect the negative battery cable.



Disconnect the positive battery cable.



Disconnect the PLG control module
connector.



Inspect the wiring harness between PLG
control module terminal 1C (wiring
harness-side) and positive battery terminal
(wiring harness-side) for an open
circuit/short circuit to ground system.



Is the wiring harness normal?

Yes

Repair or replace the wiring harness.
Go to the next step.

No

Go to the next step.

4

VERIFY CORRECTION COMPLETED



Reconnect the disconnected connector.



Clear the DTC.



Operate the PLG system.



Is DTC B1318 stored?

Yes

Replace the PLG control module.
(See POWER LIFTGATE (PLG)
CONTROL MODULE
REMOVAL/INSTALLATION .)

No

DTC troubleshooting completed.

DTC B1342

PLG control module internal malfunction

DETECTION CONDITION Malfunction in the PLG control module internal circuit

POSSIBLE CAUSE



Malfunction in the PLG control module internal circuit

STEP

INSPECTION

ACTION

1

VERIFY DTC



Clear the DTC.



Operate the PLG
system.



Is DTC B1342
stored?

Yes

Replace the PLG control module.
(See POWER LIFTGATE (PLG) CONTROL MODULE
REMOVAL/INSTALLATION .)

No

DTC troubleshooting completed.

DTC B241A

Touch sensor circuit malfunction

DETECTION

A short circuit to ground in the PLG touch sensor (RH/LH) continues for 5 min or

2008 Mazda CX-9 Grand Touring

2008 BODY & ACCESSORIES On-Board Diagnostic (Power Liftgate (PLG) System) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:46:08 AM

Page 11

© 2005 Mitchell Repair Information Company, LLC.