DTC B2939 [POWER LIFTGATE (PLG) SYSTEM]
DTC B2939 - DETECTION CONDITION POSSIBLE CAUSE CHART
1
z
Disconnect the PLG control module
connector.
z
Disconnect the PLG drive unit
connector.
z
Inspect the wiring harness between
PLG control module terminals 1E and
1F, and PLG drive unit terminals A and
B for an open circuit.
z
Is the wiring harness normal?
Yes
(See
POWER LIFTGATE (PLG) DRIVE
UNIT REMOVAL/INSTALLATION
.)
Go to the next step.
No
Repair or replace the wiring harness.
Go to the next step.
2
VERIFY CORRECTION COMPLETED
z
Reconnect the disconnected connector.
z
Clear the DTC.
z
Operate the PLG system.
z
Is DTC B2937 stored?
Yes
Replace the PLG control module.
(See
POWER LIFTGATE (PLG)
CONTROL MODULE
REMOVAL/INSTALLATION
.)
No
DTC troubleshooting completed.
DTC B2939
Clutch circuit malfunction
DETECTION
CONDITION
The current flowing to the PLG motor is normal (1 A or more), however, the output
signal of rotation sensor A continues to not change while the PLG is operating.
POSSIBLE CAUSE
z
Open circuit in wiring harness between PLG control module terminal 21 and PLG
drive unit terminal M
z
Open circuit in wiring harness between PLG control module terminal 2G and PLG
drive unit terminal N
z
Clutch malfunction
z
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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