Mazda CX-9 Grand Touring 2009 Manual page 2159

2008 BODY & ACCESSORIES On-Board Diagnostic (Power Liftgate (PLG) System) - Mazda CX-9
DIAGNOSTIC PROCEDURE
DTC B2936 - DIAGNOSTIC PROCEDURE
STEP INSPECTION
INSPECT WIRING HARNESS
BETWEEN PLG CONTROL MODULE
AND PLG DRIVE UNIT
Disconnect the PLG control module
connector.
Disconnect the PLG drive unit
1
connector.
Inspect PLG control module
terminals 1E and 1F, and PLG drive
unit terminals A and B for an open
circuit.
Is the wiring harness normal?
VERIFY CORRECTION
COMPLETED
Reconnect the disconnected
2
connector.
Clear the DTC.
Operate the PLG system.
Is DTC B2936 stored?
DTC B2937 [POWER LIFTGATE (PLG) SYSTEM]
DTC B2937 - DETECTION CONDITION POSSIBLE CAUSE CHART
DTC B2937
DETECTION
CONDITION
POSSIBLE CAUSE
2008 Mazda CX-9 Grand Touring
PLG motor circuit malfunction
PLG motor current is excessively low. (less than 1A)
Open circuit in wiring harness between PLG control module terminal 1E and
PLG motor terminal A (PLG drive unit)
Open circuit in wiring harness between PLG control module terminal 1F and
PLG motor terminal B (PLG drive unit)
PLG motor malfunction
PLG control module malfunction
Replace the PLG drive unit.
(See POWER LIFTGATE (PLG) DRIVE
Yes
UNIT REMOVAL/INSTALLATION .)
Go to the next step.
Repair or replace the wiring harness.
No
Go to the next step.
Replace the PLG control module.
Yes (See POWER LIFTGATE (PLG) CONTROL
MODULE REMOVAL/INSTALLATION .)
No DTC troubleshooting completed.
ACTION