Chrysler Town, Dodge Caravan. Manual — part 900
TEST
ACTION
APPLICABILITY
7
Disconnect the Power Liftgate Motor connector.
Disconnect the Power Liftgate Module C2 connector.
Measure the resistance between the Ground circuit (cavity 20) and the Liftgate Hall
Effect Supply circuit.
Is the resistance below 1000.0 ohms?
All
Yes
→ Repair the Door Motor Hall Effect Supply wire for a short to the
Ground circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 8
8
Disconnect the Power Liftgate Motor connector.
Disconnect the Power Liftgate Module C2 connector.
Measure the resistance of the Power Liftgate Hall Effect Signal circuit between the
Power Liftgate Motor connector and the Power Liftgate Module C2 connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 9
No
→ Repair the Liftgate Hall Effect Signal wire for an open.
Perform BODY VERIFICATION TEST - VER 1.
9
Disconnect the Power Liftgate Motor connector.
Disconnect the Power Liftgate Control Module C2 connector.
Measure the resistance between ground and the Liftgate Hall Effect Signal circuit.
Is the resistance below 100.0 ohms?
All
Yes
→ Repair the Liftgate Hall Effect Signal wire for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 10
10
Disconnect the Power Liftgate Motor connector.
Disconnect the Power Liftgate Control Module C2 connector.
Measure the resistance between the Ground circuit (cavity 20) and the Liftgate Hall
Effect Signal circuit.
Is the resistance below 1000.0 ohms?
All
Yes
→ Repair the Liftgate Hall Effect Signal wire for a short to the
Ground circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 11
11
If there are no possible causes remaining, view repair.
All
Repair
Replace the Power Liftgate Motor assembly (hall effect sensor).
Perform BODY VERIFICATION TEST - VER 1.
836
POWER DOORS - LIFTGATE
INCOMPLETE POWER OPEN - HALL EFFECT SIGNAL MISSING —
Continued
Symptom:
INCOMPLETE POWER OPEN - OVERCURRENT
When Monitored and Set Condition:
INCOMPLETE POWER OPEN - OVERCURRENT
When Monitored:
Anytime the Power Liftgate is in a power open operation.
Set Condition:
The drive motor stall current of over 24 amps has been detected for over
500 ms. or during the initial gear engagement the drive transistor is shorted, during a
power opening operation.
POSSIBLE CAUSES
DTC PRESENT
BINDING LIFTGATE
GROUND CIRCUIT OPEN
LIFTGATE LATCH CINCH DRIVER CIRCUIT SHORT TO GROUND
LIFTGATE LATCH CINCH DRIVER CIRCUIT SHORT TO HARNESS GROUND
LIFTGATE GEAR ENGAGE DRIVER CIRCUIT SHORT TO GROUND
LIFTGATE OPEN DRIVER CIRCUIT SHORT TO GROUND
LIFTGATE GEAR ENGAGE DRIVER CIRCUIT SHORT TO HARNESS GROUND
LIFTGATE MODULE
POWER LIFTGATE MOTOR
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 DTCs.
Does the DRBIII
t display INCOMPLETE POWER OPEN - OVERCURRENT?
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.
837
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 liftgate of a known good vehicle and notice the
effort needed.
Compare the effort needed on the disabled vehicle.
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
Turn the ignition off.
Disconnect the Power Liftgate Control Module C1 connector.
Using a 12-volt test light connected to 12-volts, check the Ground circuit.
Wiggle the harness and check for an intermittent open condition.
Does the test light illuminate brightly?
All
Yes
→ Go To 4
No
→ Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4
Turn the ignition off.
Disconnect the Power Liftgate Module C2 connector.
Measure the resistance between ground and the Liftgate Latch Cinch Driver circuit.
Wiggle the harness and check for an intermittent shorted condition.
Is the resistance below 100.0 ohms?
All
Yes
→ Repair the Liftgate Latch Cinch Driver circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 5
5
Turn the ignition off.
Disconnect the Power Liftgate Module C2 connector.
Measure the resistance between the Ground circuit and the Liftgate Latch Cinch
Driver circuit.
Wiggle the harness and check for an intermittent shorted condition.
Is the resistance below 100.0 ohms?
All
Yes
→ Repair the Liftgate Latch Cinch Driver circuit for a short to the
Ground circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 6
6
Turn the ignition off.
Disconnect the Power Liftgate Module C2 connector.
Measure the resistance between ground and the Liftgate Gear Engage Driver circuit.
Wiggle the harness and check for an intermittent short to ground condition.
Is the resistance below 100.0 ohms?
All
Yes
→ Repair the Liftgate Gear Engage Driver circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 7
838
POWER DOORS - LIFTGATE
INCOMPLETE POWER OPEN - OVERCURRENT —
Continued
TEST
ACTION
APPLICABILITY
7
Turn the ignition off.
Disconnect the Power Liftgate Module C1 connector.
Measure the resistance between ground and the Liftgate Open Driver circuit.
Wiggle the harness and check for an intermittent short circuit condition.
Is the resistance below 1000.0 ohms?
All
Yes
→ Repair the Liftgate Open Driver circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 8
8
Turn the ignition off.
Disconnect the Power Liftgate Module C2 connector.
Measure the resistance between the Ground circuit and the Liftgate Gear Engage
Driver circuit.
Wiggle the harness and check for an intermittent short to ground condition.
Is the resistance below 100.0 ohms?
All
Yes
→ Repair the Liftgate Gear Engage Driver circuit for a short to the
Ground circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 9
9
Ensure all connections to the module and liftgate motor are connected at this time.
Operate the Power Liftgate in both directions if possible.
Does the motor start to lift the liftgate but is very slow and labors extensively?
All
Yes
→ Replace the Power Liftgate Motor assembly.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Power Liftgate Module
Perform BODY VERIFICATION TEST - VER 1.
839
POWER DOORS - LIFTGATE
INCOMPLETE POWER OPEN - OVERCURRENT —
Continued
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