Power
Tailgate(hereinafter PTG) is the system which moves tailgate 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).
Drive unit is located at left D pillar (quater panel). It is core part of
PTG that drives leg which is connected with push rod by force of motor to
move tailgate. Beside that Drive unit consists of PTG ECU, motor,push rod,
channel, clutch and two optical sensor. When power gate open signal is
recieved, PTG ECU drives motor of drive unit by operating clutch and
pinion gear transmits drive force of motor into an up-and-down motion of
leg. according to motion of leg, push rod move vertically to move gate.
Optical sensor monitors these system operation and delivers it to PTG
ECU.
The ECM sets DTC B2423
if there's open or short to battery in door clutch power
harness.
Item
|
Detecting
Condition
|
Possible Cause
|
DTC
Strategy
|
|
| •
|
Short to battery in power
harness |
|
Enable
Conditions
|
| •
|
IGN "ON" & ENG "OFF"
PTG "ON" & clutch
"OFF" | |
Threshold
value
|
|
Detecting
time
|
|
FAIL
SAFE
|
| •
|
Inhibit powerdoor
operation | |
| 1. |
Connect scantool to Data Link
Connector(DLC). |
| 2. |
Ignition "ON" & engine "OFF" & PTG
"ON" & Door clutch "OFF" |
| 3. |
Monitor the "clutch Feedback" Parameter on the
Scantool.
Specification
: 3.25V or less
|
|
| 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 open in harness
| (1) |
Ignition "OFF" & engine
"OFF" |
| (2) |
Disconnect "PTG MOTOR" and "PTG module"
connector. |
| (3) |
Measure resistance between door clutch
terminal of PTG module and door clutch terminal of PTG
MOTOR.
Specification :
Approx. 0 Ω
| |
| (4) |
Is the measured resistance within
specifications?
|
|
▶ Go
to "Check for short in harness"
procedure.
|
|
|
▶
Check for open 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 "PTG module"
connector. |
| (3) |
Measure resistance between ground
terminal for clutch of PTG module and chassis
ground.
Specification :
Approx. ∞ Ω
| |
| (4) |
Is the measured resistance within
specifications?
|
|
▶ Go
to "Component Inspection" procedure.
|
|
|
▶
Check for short in power harness. Repair as necessary
and go to "Verification of Vehicle Repair"
procedure.
|
| |
| 1. |
Check door clutch
| (1) |
Ignition "OFF" & engine
"OFF" |
| (2) |
Disconnect door
clutch |
| (3) |
Connect (+) terminal of battery to
sensing terminal of door clutch and (-) terminal to ground
terminal of door clutch |
| (4) |
Dose the door clutch work
properly?
|
|
▶ Go
to "PTG module" procedure.
|
|
|
▶
Substitute with a known-good drive unit and check for
proper operation.
If the
problem is corrected, replace drive unit and then go to
"Verification of Vehicle Repair"
procedure.
※ It is impossible
to change door clutch separately. So it is changed by
drive unit when change is
necessary.
|
| |
| 2. |
Check PTG module
| (1) |
Ignition "ON" & engine
"OFF" |
| (2) |
Operate the door clutch "ON"
status. |
| (3) |
Measure the voltage between power
terminal for door clutch of PTG module and chassis
ground.
Specification :
Approx. : above 0.5V
| |
| (4) |
Dose the door clutch work
properly?
|
|
▶
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.
|
|
