Page 844 of 4284

Symptom:
IOD WAKE UP OPEN - PLG
When Monitored and Set Condition:
IOD WAKE UP OPEN - PLG
When Monitored: Anytime the Body Control Module is awake.
Set Condition: If the BCM does not sense a signal circuit from the Liftgate Module this
code will set.
POSSIBLE CAUSES
DTC PRESENT
BODY CONTROL MODULE - IOD WAKE UP OPEN
LIFTGATE MODULE WAKE UP SIGNAL WIRE OPEN
LIFTGATE MODULE WAKE UP SIGNAL WIRE SHORT TO GROUND
POWER LIFTGATE MODULE
TEST ACTION APPLICABILITY
1 With the DRBIIIt, record and erase DTC's.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Wait 10 seconds.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay IOD WAKE UP OPEN?All
Ye s®Go To 2
No®Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.
2 Disconnect the BCM C2 connector.
Measure the voltage between the Liftgate Module Wake Up Signal circuit and
ground.
Is the voltage above 10.0 volts?All
Ye s®Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
3 Disconnect the Body Control Module C2 connector.
Disconnect the Power Liftgate Module C2 connector.
Measure the resistance of the Liftgate Module Wake Up Signal circuit between the
BCM C2 connector and the Power Liftgate Module C2 connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 4
No®Repair the Liftgate Module Wake Up Signal wire for an open.
Perform BODY VERIFICATION TEST - VER 1.
815
POWER DOORS - LIFTGATE
Page 846 of 4284
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 DRBIIIt, 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 DRBIIIt, read ACTIVE DTCs.
Does the DRBIIItdisplay LOOPBACK TEST FAILURE?All
Ye s®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.
817
POWER DOORS - LIFTGATE
Page 853 of 4284

Symptom:
OVERHEAD LIFTGATE SWITCH INPUT STUCK
When Monitored and Set Condition:
OVERHEAD LIFTGATE SWITCH INPUT STUCK
When Monitored: Whenever the BCM is awake.
Set Condition: When the BCM senses a overhead liftgate switch input for over 10
seconds, this code will set.
POSSIBLE CAUSES
DTC PRESENT
OVERHEAD LIFTGATE SWITCH SHORTED
LIFTGATE SWITCH MUX WIRE SHORT TO GROUND
BODY CONTROL MODULE - OVERHEAD LIFTGATE SWITCH MUX SHORTED
TEST ACTION APPLICABILITY
1 With the DRBIIIt, record and erase DTC's.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the Liftgate from the Overhead Console Switch.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay OVERHEAD LIFTGATE SWITCH INPUT STUCK?All
Ye s®Go To 2
No®Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.
2 With the DRBIIIt, erase DTCs.
Disconnect the Overhead Console Switch connector.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Wait 10 seconds.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay OVERHEAD LIFTGATE SWITCH INPUT STUCK?All
No®Replace the Power Sliding Door Button Module.
Perform BODY VERIFICATION TEST - VER 1.
Ye s®Go To 3
3 Disconnect the Body Control Module C2 connector.
Disconnect the Overhead Console Switch connector.
Measure the resistance of the Liftgate Switch Mux circuit to ground.
Is the resistance below 4000.0 ohms?All
Ye s®Repair the Liftgate Switch Mux wire for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
824
POWER DOORS - LIFTGATE
Page 854 of 4284

Symptom:
OVERHEAD LIFTGATE/LOCKOUT SWITCHES OPEN
When Monitored and Set Condition:
OVERHEAD LIFTGATE/LOCKOUT SWITCHES OPEN
When Monitored: Whenever the BCM is awake.
Set Condition: When the BCM senses a overhead liftgate switch input that is greater
than 4.8 volts for over 10 seconds, this code will set.
POSSIBLE CAUSES
DTC PRESENT
SLIDING DOORS OVERHEAD SWITCH MUX CIRCUIT SHORT TO VOLTAGE
LIFTGATE SWITCH MUX WIRE OPEN
BODY CONTROL MODULE - OVERHEAD SWITCH OPEN
OVERHEAD SWITCH OPEN
TEST ACTION APPLICABILITY
1 With the DRBIIIt, record and erase DTC's.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the power sliding door from the Overhead Console Switch.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay OVERHEAD LIFTGATE/LOCKOUT SWITCHES OPEN?All
Ye s®Go To 2
No®Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.
2 Disconnect the Body Control Module C3 connector.
Measure the voltage of the Sliding Doors Overhead Switch Mux circuit to ground.
Is there any voltage present?All
Ye s®Repair the Sliding Doors Overhead Switch Mux circuit for a short
to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
3 Disconnect the Body Control Module C2 connector.
Measure the resistance between ground and the Liftgate Switch Mux circuit.
Is the resistance below 25000.0 ohms?All
Ye s®Go To 4
No®Go To 5
4 If there are no possible causes remaining, view repair. All
Repair
Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
825
POWER DOORS - LIFTGATE
Page 856 of 4284

Symptom:
OVERHEAD LIFTGATE/LOCKOUT SWITCHES SHORT
When Monitored and Set Condition:
OVERHEAD LIFTGATE/LOCKOUT SWITCHES SHORT
When Monitored: Whenever the BCM is awake.
Set Condition: When the BCM senses a overhead liftgate switch input that drops to below
0.24 volts for over 10 seconds, this code will set.
POSSIBLE CAUSES
DTC PRESENT
OVERHEAD LIFTGATE SWITCH SHORTED
LIFTGATE SWITCH MUX WIRE SHORT TO GROUND
BODY CONTROL MODULE - OVERHEAD LIFTGATE SWITCH MUX SHORTED
TEST ACTION APPLICABILITY
1 With the DRBIIIt, record and erase DTC's.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the Liftgate from the Overhead Console Switch.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay OVERHEAD SWITCH #1 SHORT?All
Ye s®Go To 2
No®Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.
2 With the DRBIIIt, erase DTCs.
Disconnect the Overhead Console Switch connector.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Wait 10 seconds.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay OVERHEAD SWITCH #1 SHORT?All
No®Replace the Power Sliding Door Button Module.
Perform BODY VERIFICATION TEST - VER 1.
Ye s®Go To 3
3 Disconnect the Body Control Module C2 connector.
Disconnect the Overhead Console Switch connector.
Measure the resistance of the Liftgate Switch Mux circuit to ground.
Is the resistance below 500.0 ohms?All
Ye s®Repair the Liftgate Switch Mux wire for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No®Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
827
POWER DOORS - LIFTGATE
Page 857 of 4284

Symptom:
PINCH SENSOR CIRCUIT OPEN
When Monitored and Set Condition:
PINCH SENSOR CIRCUIT OPEN
When Monitored: Whenever the Power Liftgate is operating.
Set Condition: The power liftgate module has detected the pinch sensor circuit voltage is
above 4.6 volts.
POSSIBLE CAUSES
DTC PRESENT
POWER LIFTGATE MODULE - PINCH SENSOR OPEN
RIGHT PINCH SENSOR SIGNAL WIRE OPEN
PINCH SENSOR GROUND OPEN
RIGHT PINCH SENSOR OPEN
LEFT PINCH SENSOR OPEN
RIGHT PINCH SENSOR SIGNAL WIRE OPEN
TEST ACTION APPLICABILITY
1 With the DRBIIIt, record and erase DTC's.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the liftgate several times.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay PINCH SENSOR CIRCUIT OPEN?All
Ye s®Go To 2
No®Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.
2 Disconnect the Power Liftgate Module C2 connector.
Measure the resistance of the Pinch Sensor Signal circuit between the Pinch Sensor
Signal and the Ground circuit (cavity 20) in the C2 connector.
Is the resistance below 22000.0 ohms?All
No®Go To 3
Ye s®Replace the Power Liftgate Module.
Perform BODY VERIFICATION TEST - VER 1.
828
POWER DOORS - LIFTGATE
Page 860 of 4284

Symptom:
PINCH SENSOR SIGNAL CIRCUIT SHORT TO GROUND
When Monitored and Set Condition:
PINCH SENSOR SIGNAL CIRCUIT SHORT TO GROUND
When Monitored: Whenever the Power Liftgate is operating.
Set Condition: The power liftgate module has detected the pinch sensor circuit voltage is
shorted to ground.
POSSIBLE CAUSES
DTC PRESENT
PINCH SENSOR SIGNAL CIRCUIT SHORT TO GROUND CIRCUIT
POWER LIFTGATE MODULE - SHORT TO GROUND
RIGHT PINCH SENSOR - SHORT TO GROUND
RIGHT PINCH SENSOR SIGNAL WIRE - SHORT TO GROUND
LEFT PINCH SENSOR - SHORT TO GROUND
RIGHT PINCH SENSOR SIGNAL WIRE SHORT TO GROUND
TEST ACTION APPLICABILITY
1 With the DRBIIIt, record and erase DTC's.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the liftgate several times.
With the DRBIIIt, read DTCs.
Does the DRBIIItdisplay PINCH SENSOR CIRCUIT SHORT TO GROUND?All
Ye s®Go To 2
No®Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.
2 Disconnect the Power Liftgate Module C2 connector.
Measure the resistance of the Pinch Sensor Signal circuit between the Pinch Sensor
Signal and the Ground circuits in the C2 connector.
Is the resistance below 20.0 ohms?All
Ye s®Repair the Pinch Sensor Signal circuit for a short to the Ground
circuit.
Perform BODY VERIFICATION TEST - VER 1.
No®Go To 3
3 Disconnect the Power Liftgate Module C2 connector.
Measure the resistance between ground and the Pinch Sensor Signal circuit.
Is the resistance below 100.0 ohms?All
Ye s®Go To 4
No®Replace the Power Liftgate Module.
Perform BODY VERIFICATION TEST - VER 1.
831
POWER DOORS - LIFTGATE
Page 862 of 4284

Symptom:
*POWER LIFTGATE INOPERATIVE
POSSIBLE CAUSES
DTC'S PRESENT
MODULE RESPONSE
INTERMITTENT PROBLEM
SYSTEM TESTS
TEST ACTION APPLICABILITY
1 With the DRBIIItcheck for response from the Body Computer and the Power
Liftgate Modules
Is there response from both modules?All
Ye s®Go To 2
No®Refer to symptom list for problems related to COMMUNICA-
TION.
2 With the DRBIIIt, read DTCs in POWER LIFTGATE and BODY COMPUTER.
Are any Power Liftgate related codes present?All
Ye s®Refer to symptom list for problems related to POWER LIFT-
GATE.
No®Go To 3
3 This test will determine what inhibited the Power Liftgate from operating properly.
With the DRBIIIt, select POWER LIFTGATE, MISCELLANEOUS, LAST INHIBIT
MONITOR.
Does the DRBIIItdisplay any INHIBIT REASONS?All
Ye s®Check for any binding conditions or other restrictions that may
prevent proper operation. Using the wiring diagram/schematic as
a guide, inspect the wiring and connectors.
No®Go To 4
4 Ensure Liftgate is fully closed before proceeding.
With the DRBIIItselect SYSTEM TEST.
Perform the Open, Close, Latch Cinch, Latch Release and Relay tests.
Did any test fail?All
Ye s®Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors.
No®Test Complete.
833
POWER DOORS - LIFTGATE