Disconnected battery trying to reset module - did not change. try to operate makes a clicking/grinding sound for about 3 seconds. what to check to decide what is bad
You have to pull the inside door panel off an check it out , only way !
Normal Operation
The smart junction box (SJB) does not release the liftgate unless the doors have been unlocked electronically or the request is initiated from a remote keyless entry (RKE) transmitter.
The SJB sends a voltage signal to the liftgate release switch (part of the liftgate release handle) through circuit CPL45 (BN). When the switch is activated (the handle is pulled), the signal is routed to ground through circuit GD150 (BK/WH). When the SJB detects a request from the liftgate release switch, the SJB provides voltage through circuit CPL10 (BN/BU) to the liftgate latch release motor (integral to the liftgate latch) (vehicles with a manual liftgate) or the power liftgate module (vehicles equipped with a power liftgate). For vehicles with a manual liftgate, ground for the liftgate latch is provided through circuit GD150 (BK/WH).
DTC B2666 - is an on-demand DTC that sets when the SJB detects a short to ground from the liftgate release switch input circuit.
DTC B273A - is an on-demand DTC that sets when the SJB detects a short to ground from the liftgate latch release output circuit.
DTC B273B - is an on-demand DTC that sets when the SJB detects an open or short to voltage from the liftgate latch release output circuit.
Possible Causes
Your best bet is to take it to the dealer !
NOTE:If the power liftgate system is turned OFF in the message center, the system cannot be activated with any switches or with the liftgate handle. The system will need to be turned ON for any power operation to occur.
NOTE:The power liftgate may not operate under the following conditions:
Power Liftgate Module Diagnostic Trouble Code (DTC) Index
Power Liftgate Module Diagnostic Trouble Code (DTC) Index
DTC
Description
Source
Action
B1342
ECU Is Defective
Power Liftgate Module
INSTALL a new power liftgate module. REFER to Power Liftgate Modulein this section.
B2477
Module Configuration Failure
Power Liftgate Module
REFER to Section 418-01.
B2522
Vbatt1 Circuit Failure
Power Liftgate Module
GO to Pinpoint Test B.
B2552
Vbatt2 Circuit Open
Power Liftgate Module
GO to Pinpoint Test B.
B2698
Vbatt2 Circuit Failure
Power Liftgate Module
GO to Pinpoint Test B.
B2699
Left Pinch Strip Open Or Short To Battery
Power Liftgate Module
GO to Pinpoint Test B.
B2700
Right Pinch Strip Open Or Short To Battery
Power Liftgate Module
GO to Pinpoint Test B.
B2701
Left Pinch Strip Stuck Active
Power Liftgate Module
GO to Pinpoint Test B.
B2702
Right Pinch Strip Stuck Active
Power Liftgate Module
GO to Pinpoint Test B.
B2703
Open/Close Switch Stuck Active
Power Liftgate Module
GO to Pinpoint Test B.
B2704
Optical Sensor Power Short To Ground
Power Liftgate Module
GO to Pinpoint Test B.
B2705
Optical Sensor 1 Input Not Active During Powered Gate Movement
Power Liftgate Module
GO to Pinpoint Test B.
B2706
Optical Sensor 2 Input Not Active During Powered Gate Movement
Power Liftgate Module
GO to Pinpoint Test B.
B2709
Gate Open Output Short To Battery
Power Liftgate Module
GO to Pinpoint Test B.
B2710
Gate Close Output Short To Battery
Power Liftgate Module
GO to Pinpoint Test B.
B2711
Gate Open Output Short To Ground Or Open
Power Liftgate Module
GO to Pinpoint Test B.
B2712
Gate Close Output Short To Ground Or Open
Power Liftgate Module
GO to Pinpoint Test B.
B2713
Unlatch Output Short To Ground Or Open
Power Liftgate Module
GO to Pinpoint Test B.
B2714
Uncinch Output Short To Ground Or Open
Power Liftgate Module
GO to Pinpoint Test B.
B2715
Cinch Output Short To Ground Or Open
Power Liftgate Module
GO to Pinpoint Test B.
B2718
Gate Ajar Output Short To Battery
Power Liftgate Module
GO to Pinpoint Test B.
B2721
Gate Ajar Output Short To Ground Or Open
Power Liftgate Module
GO to Pinpoint Test B.
B2722
Open/Close Switch Active During Self-Test
Power Liftgate Module
GO to Pinpoint Test B.
B2723
Glass Position Switch Active During Self-Test
Power Liftgate Module
GO to Pinpoint Test B.
B2724
Forkbolt Switch Invalid During Self-Test
Power Liftgate Module
GO to Pinpoint Test B.
B2725
Detent Switch Invalid During Self-Test
Power Liftgate Module
GO to Pinpoint Test B.
B2726
Home Switch Invalid During Self-Test
Power Liftgate Module
GO to Pinpoint Test B.
B2819
Gate Motor Circuit Short To Battery
Power Liftgate Module
GO to Pinpoint Test B.
B2820
Gate Motor Circuit Short To Ground Or Open
Power Liftgate Module
GO to Pinpoint Test B.
B2821
Cincher Motor/Unlatch Actuator Short To Ground Or Open
Power Liftgate Module
GO to Pinpoint Test B.
B2822
Cincher Motor/Unlatch Actuator Short To Battery
Power Liftgate Module
GO to Pinpoint Test B.
B2825
Movement Ceased Due To Excess Speed Deviation
Power Liftgate Module
GO to Pinpoint Test B.
B2903
Chime Output Circuit Short To Battery
Power Liftgate Module/ Liftgate Chime Module
GO to Pinpoint Test C.
C1935
Chime Circuit Failure
Power Liftgate Module/ Liftgate Chime Module
GO to Pinpoint Test C.
U1950
UBP Communication BUS Fault
UBP Communi cation
REFER to Section 418-00.
U2338
Invalid ACM Message Data
Power Liftgate Module
To open the lift gate manually, use the door unlock switch located
on the drivers door. This should unlock the lift gate as well. Go to the lift
gate and lift the handle to open the rear gate.
Your power lift gate is computer controlled. Sometimes there will
be a faulty input sensor or part that will show the incorrect data to the computer,
therefore the computer will not go through its normal functions.
In most cases its the problem of lift gate latch assembly.
To get it tested and confirmed there is a troubleshoot guide
provided by the service center. To perform this troubleshooting guide you will
require a scan tool to diagnose the exact problem.
the troubleshooting procedure is as follows:---
Please use the following information below when diagnosing an inoperative
lift gate. Disconnect the connector at the lift
gate latch assembly. With the lift gate latch connector disconnected, the 3
signals for the ratchet, pawl, and the sector should be inactive on the scan
tool.
Install a 3A fused jumper wire between each signal circuit
terminal (for the pawl, sector, and ratchet) and the ground circuit terminal 2.
Monitor the scan tool as each individual circuit is jumped to ground, the scan
tool should read "active".
If either tests above fails, check the wiring for the signal
circuits, low reference circuit, or try a power lift gate control module from a known good vehicle. If both tests above pass, monitor the internal switch inputs in
the lift gate latch assembly for proper operation.
3. A) with the lift gate in the open position, the ratchet and the
pawl should read "active" and the sector should read
"inactive"
B) With the lift gate in the secondary latched position, the pawl
should read "Inactive" and the ratchet and sector should read
"active"
C) With the lift gate fully closed, the pawl, ratchet, and the
sector should all read "inactive".
4.If one of the internal lift gate latch assembly switch inputs
are not reading correctly in one of the positions above and the vehicles passes
test 1 and 2 above. Replace the lift gate latch assembly.
Please follow this diagnostic or repair process thoroughly and
complete each step. If the condition exhibited is resolved without completing
every step, the remaining steps do not need to be performed.
This should help you.Thanks.Helpmech.
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