Chrysler Town, Dodge Caravan. Manual — part 902
TEST
ACTION
APPLICABILITY
4
Disconnect the Body Control Module C2 connector.
Disconnect the Power Liftgate Module C2 connector.
Measure the resistance between the Liftgate Module Wake Up Signal circuit and
ground.
Is the resistance below 100.0 ohms?
All
Yes
→ Repair the Liftgate Module Wake Up Signal wire for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 5
5
If there are no possible causes remaining, view repair.
All
Repair
Replace the Power Liftgate Module.
Perform BODY VERIFICATION TEST - VER 1.
844
POWER DOORS - LIFTGATE
IOD WAKE UP OPEN - PLG —
Continued
Symptom:
LOOPBACK TEST FAILURE
When Monitored and Set Condition:
LOOPBACK TEST FAILURE
When Monitored:
Anytime the Power Liftgate Module is awake.
Set Condition:
The Power Liftgate Module did not receive its own transmitted message
on the PCI bus back (loopback) for longer than 1 second.
POSSIBLE CAUSES
DTC PRESENT
POWER LIFTGATE MODULE
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 LOOPBACK TEST FAILURE?
All
Yes
→ Replace the Power Liftgate Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition. Operate the
door several times and check for any binding conditions.
Perform BODY VERIFICATION TEST - VER 1.
845
POWER DOORS - LIFTGATE
Symptom:
LOSS OF BCM MESSAGES
When Monitored and Set Condition:
LOSS OF BCM MESSAGES
When Monitored:
Whenever the ignition is on.
Set Condition:
If the PLG Module losses communication with the BCM for over 5 seconds,
this code will set.
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE BODY CONTROL MODULE
POWER LIFTGATE MODULE - LOSS OF BCM MESSAGES
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, enter Body then Body Computer.
Was the DRBIII
t able to I/D or communicate with the BCM?
All
Yes
→ Go To 2
No
→ Refer to the Communication category for the related symptom(s).
2
With the DRBIII
t, erase DTC’s.
Cycle the ignition switch from off to on and wait approximately 1 minute.
With the DRBIII
t, read DTC’s.
Did this DTC reset?
All
Yes
→ Replace the Power Liftgate Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
846
POWER DOORS - LIFTGATE
Symptom:
LOSS OF EATX MESSAGES
When Monitored and Set Condition:
LOSS OF EATX MESSAGES
When Monitored:
Whenever the ignition is in the UNLOCK or RUN position.
Set Condition:
If the PLG Module does not receive a PRNDL message for over 5 seconds,
this code will set.
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE TRANSMISSION CONTROL MODULE
POWER LIFTGATE MODULE - LOSS OF EATX MESSAGES
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t select Transmission.
Was the DRBIII
t able to I/D or communicate with the Transmission?
All
Yes
→ Go To 2
No
→ Refer to the Communication category for the related symptom(S).
2
With the DRBIII
t, erase DTC’s.
Cycle the ignition switch from off to on and wait approximately 1 minute.
With the DRBIII
t, read DTC’s.
Did this DTC reset?
All
Yes
→ Replace the Power Liftgate Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
847
POWER DOORS - LIFTGATE
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