Chrysler Town, Dodge Caravan. Manual — part 898
Symptom:
INCOMPLETE POWER OPEN - FULL OPEN SWITCH FAILURE/
NON ENGAGEMENT
When Monitored and Set Condition:
INCOMPLETE POWER OPEN - FULL OPEN SWITCH FAILURE/NON ENGAGE-
MENT
When Monitored:
During the Power Liftgate open cycle.
Set Condition:
The Full Open Switch was detected as closed before 200 hall effect pulses
were counted since the start of the open operation. May be triggered by an intermittent full
open switch failure or a non gear engagement.
POSSIBLE CAUSES
DTC PRESENT
OBSTRUCTION OR STICKING FULL OPEN SWITCH
FULL OPEN SWITCH SHORT TO GROUND
POWER LIFTGATE MOTOR ASSEMBLY - FULL OPEN SWITCH
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, record and erase DTC’s.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the power liftgate several times if possible.
With the DRBIII
t, read ACTIVE DTCs.
Does the DRBIII
t display INCOMPLETE POWER OPEN - FULL OPEN SWITCH
FAILURE?
All
Yes
→ Go To 2
No
→ Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition. Operate the
liftgate several times and check for any binding or obstructions.
Perform BODY VERIFICATION TEST - VER 1.
2
Examine the liftgate for proper fit and alignment, foreign material in the drive unit
or anything that would cause an obstruction to proper operation of the Full Open
Switch.
With the DRBIII
t in Inputs/Outputs, read the FULL OPEN SWITCH state.
Manually operate the liftgate while monitoring the DRBIII
t.
Does the switch status change smoothly as the liftgate is pulled down from the full
open position.
All
Yes
→ Go To 3
No
→ Refer to Service information for the related symptom(S).
Perform BODY VERIFICATION TEST - VER 1.
828
POWER DOORS - LIFTGATE
TEST
ACTION
APPLICABILITY
3
With the DRBIII
t in Inputs/Outputs, read the FULL OPEN SWITCH state.
Open the liftgate to mid position.
While monitoring the DRBIII
t, wiggle the wiring harness from the Power Liftgate
Module to the Full Open Switch on the Power Liftgate Motor assembly.
Did the switch status ever change?
All
Yes
→ Repair the Full Open Switch Sense circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
If there are no possible causes remaining, view repair.
All
Repair
Replace the Power Liftgate Motor assembly.
Perform BODY VERIFICATION TEST - VER 1.
829
POWER DOORS - LIFTGATE
INCOMPLETE POWER OPEN - FULL OPEN SWITCH FAILURE/NON
ENGAGEMENT —
Continued
Symptom:
INCOMPLETE POWER OPEN - EXCESSIVE H.E. COUNTS/NON
ENGAGEMENT
When Monitored and Set Condition:
INCOMPLETE POWER OPEN - EXCESSIVE H.E. COUNTS/NON ENGAGEMENT
When Monitored:
During Power Liftgate opening cycle.
Set Condition:
If the PLG Module detects that the Power Liftgate Motor has generated
more than 700 hall effect pulses during a full power cycle, this code will set.
POSSIBLE CAUSES
DTC PRESENT
POWER LIFTGATE MODULE - HALL EFFECT OPEN
BINDING LIFTGATE
LIFTGATE GEAR ENGAGE DRIVER WIRE OPEN
LIFTGATE GEAR ENGAGE DRIVER WIRE SHORT TO GROUND
LIFTGATE GEAR ENGAGE DRIVER WIRE SHORT TO THE LIFTGATE GEAR DISENGAGE WIRE.
LIFTGATE GEAR DISENGAGE DRIVER WIRE OPEN
LIFTGATE GEAR DISENGAGE DRIVER WIRE SHORT TO GROUND
POWER LIFTGATE MODULE - GEAR ENGAGE CIRCUIT OPEN
POWER LIFTGATE MOTOR
POWER LIFTGATE MOTOR - GEAR ENGAGE OPEN
POWER LIFTGATE MOTOR - GEAR ENGAGE SHORT TO GROUND
POWER LIFTGATE MOTOR - GEAR ENGAGE SHORTED
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, record and erase DTC’s.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the Power Liftgate several times from stop to stop if possible.
With the DRBIII
t, read ACTIVE DTCs.
Does the DRBIII
t display INCOMPLETE POWER OPEN - EXCESSIVE H.E.
COUNTS/NON ENGAGEMENT?
All
Yes
→ Go To 2
No
→ Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition. Operate the
liftgate several times and check for any binding conditions.
Perform BODY VERIFICATION TEST - VER 1.
830
POWER DOORS - LIFTGATE
TEST
ACTION
APPLICABILITY
2
Examine the liftgate for proper alignment, worn or binding hinges, weak liftgate prop
assembly, loose/ hard weatherstrip, and gear teeth on the Power Liftgate Motor
assembly for wear or anything that would cause an obstruction to proper operation.
If necessary manually operate the power liftgate on a known good vehicle and notice
the effort needed to open and close for comparison.
Especially notice the effort needed to unlatch and close the liftgate.
Were there any mechanical problems found?
All
Yes
→ Refer to Service information for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Operate the liftgate from the full closed position and put an obstacle in it’s path to
make it reverse.
Did the door reverse back to the closed position?
All
Yes
→ Go To 4
No
→ Replace the Power Liftgate Module.
Perform BODY VERIFICATION TEST - VER 1.
4
Disconnect the Power Liftgate Module C2 connector.
Measure the resistance between the Liftgate Gear Engage Driver circuit and the
Liftgate Gear Disengage Driver circuit in the PLG Module connector.
Select the resistance found.
All
Below 5.0 ohms.
Between 5.1 and 8.0 ohms.
Above 8.1 ohms
5
Disconnect the Power Liftgate Motor connector.
Disconnect the Power Liftgate Control Module C2 connector.
Measure the resistance between the Liftgate Gear Engage Driver circuit and the
Liftgate Gear Disengage Driver circuit in the PLG Module connector.
Is the resistance below 10000.0 ohms?
All
Yes
→ Repair the Liftgate Gear Engage Driver wire for a short to the
Liftgate Gear Disengage Driver wire.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 6
6
If there are no possible causes remaining, view repair.
All
Repair
Replace the Power Liftgate Motor Assembly.
Perform BODY VERIFICATION TEST - VER 1.
7
Disconnect the Power Liftgate Module C2 connector.
Measure the resistance between Ground and the Liftgate Gear Engage Driver circuit.
Is the resistance below 10000.0 ohms?
All
Yes
→ Go To 8
No
→ Go To 11
831
POWER DOORS - LIFTGATE
INCOMPLETE POWER OPEN - EXCESSIVE H.E. COUNTS/NON ENGAGE-
MENT —
Continued
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