Power Tail
Gate(hereinafter PTG) is the system which moves tail gate of vehicle by
electronic motor so that user can open or close door with less force than
required on manual operation. PTG consists of drive unit, handle, switch,
warning buzzer, anti pinch(right/left) and cinch/latch(2 switch each).
Latch assembly is adapted to control open/close tail gate, Latch assembly
consists of latch motor and cinch motor and is located at tail gate. latch
switch controls lock/unlock of door It consists of latch/cinch motor When
power gate open signal is recieved, PTG ECU unlatch the switch and starts
operation. On the contrary, When power gate close signal is recieved, PTG
ECU close the door unltil latch and striker is in primary full latch
position.
The ECM sets DTC B2451
if there's short in unlach motor power harness.
Item
|
Detecting
Condition
|
Possible Cause
|
DTC
Strategy
|
|
|
Enable
Conditions
|
| •
|
IGN "ON" & ENG "OFF" & PTG
"ON" | |
Threshold
value
|
|
Detecting
time
|
|
FAIL
SAFE
|
| •
|
Inhibit powerdoor
operation | |
| 1. |
Connect scantool to Data Link
Connector(DLC). |
| 2. |
Ignition "ON" & engine "OFF" & PTG
"ON" & Latch switch "ON" |
| 3. |
Monitor the "Unlatch Return Feedback" and
"Unlatch Feedback" Parameter on the Scantool.
|
| 4. |
Is the measured current data within
specifications?
|
|
▶ Fault is
intermittent caused by poor contact in the sensor's and/or
ECM's connector or was repaired and ECM memory was not
cleared. Thoroughly check connectors for looseness, poor
connection, bending, corrosion, contamination, deterioration,
or damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair" procedure.
|
|
|
▶ Go to
"Inspection & Repair"
procedure.
|
|
| Terminal And Connector
Inspection |
| 1. |
Many malfunctions in the electrical system are
caused by poor harness and terminals.
Faults can also be caused by interference from
other electrical systems, and mechanical or chemical
damage. |
| 2. |
Thoroughly check connectors for looseness,
poor connection, bending, corrosion, contamination, deterioration,
or damage. |
| 3. |
Has a problem been found?
|
|
▶ Repair as
necessary and go to "Verification Vehicle Repair"
procedure.
|
|
|
▶ Go to
"W/Harness Inspection"
procedure.
|
|
| 1. |
Check for short in harness
| (1) |
Ignition "OFF" & engine
"OFF" |
| (2) |
isconnect "LATCH & CINCH #2" and
"PTG module. |
| (3) |
Measure resistance between power
terminal for unlatch motor of PTG module and unlatch
motor.
Specification : Approx. ∞ Ω
| |
| (4) |
Is the measured resistance within
specifications?
|
|
▶ Go
to "Ground circuit Inspection"
procedure.
|
|
|
▶
Check for short in power harness. Repair as necessary
and go to "Verification of Vehicle Repair"
procedure.
|
| |
| 2. |
Check for short in harness
| (1) |
Ignition "OFF" & engine
"OFF" |
| (2) |
Disconnect "LATCH & CINCH #2" and
"PTG module. |
| (3) |
Measure resistance between return
terminal for unlatch motor of PTG module and unlatch
motor.
Specification :
Approx. ∞ Ω
| |
| (4) |
Is the measured resistance within
specifications?
|
|
▶ Go
to "Component Inspection" procedure.
|
|
|
▶
Check for short in harness. Repair as necessary and go
to "Verification of Vehicle Repair"
procedure.
|
| |
| 1. |
Check latch switch
| (1) |
Ignition "OFF" & engine
"OFF" |
| (2) |
Disconnect latch
switch |
| (3) |
Connect (+) terminal of battery to
terminal 1 of latch switch and (-) terminal to terminal 2 of
latch switch |
| (4) |
Connect (+) terminal of battery to
terminal 2 of latch switch and (-) terminal to terminal 1 of
latch switch
Specification :
Approx. "ON" → 500Ω, "OFF" →
6.2kΩ±5%
| |
| (5) |
Dose the latch motor work
properly?
|
|
▶
Check connectors for looseness, poor connection,
bending, corrosion, contamination, deterioration, or
damage. Repair or replace as necessary and then go to
"PTG module inspection" procedure.
|
|
|
▶
Substitute with a known-good drive unit and check for
proper operation.
If the
problem is corrected, replace latch switch and then go
to "Verification of Vehicle Repair"
procedure.
|
| |
| 2. |
Check the "PTG module"
| (1) |
Ignition "ON" & engine
"OFF" |
| (2) |
Disconnect LATCH & CINCH #2
connector. |
| (3) |
Measure the voltage between power
terminal for UNLATCH MOTOR of PTG module and chassis
ground.
Specification :
Approx.9~16V
| |
| (4) |
Is the measured voltage within
specifications?
|
|
▶
Check connectors for looseness, poor connection,
bending, corrosion, contamination, deterioration, or
damage. Repair or replace as necessary and then go to
"Verification of Vehicle Repair"
procedure.
|
|
|
▶
Substitute with a known-good "PTG module" and check for
proper operation.
If the
problem is corrected, replace "PTG module" and then go
to "Verification of Vehicle Repair"
procedure.
|
| |
| Verification Of Vehicle
Repair |
After a repair, it is
essential to verify that the fault has been corrected.
| 1. |
Connect scantool and selet "Diagnostic Trouble
Codes(DTCs)" mode and then clear
DTC. |
| 2. |
Operate the vehicle and monitor the DTC on the
scantool. |
| 3. |
Are any DTCs present ?
|
|
▶ Go to the
applicable troubleshooting procedure.
|
|
|
▶ System is
performing to specification at this
time.
|
|
