Jeep Liberty KJ. Manual — part 118
Theory of Operation
The scan tool will display the door state NOT the switch state. It will display as True/False. True states that the door
is ajar (open). False states that the door is NOT ajar (closed).
Possible Causes
(G80) FLIP-UP GLASS AJAR SWITCH SENSE CIRCUIT SHORT TO GROUND
FLIP-UP GLASS AJAR SWITCH
BODY CONTROL MODULE
1.
CHECK FOR SHORTED FLIP-UP GLASS AJAR SWITCH
With the scan tool in Data Display, read the FLIP-UP AJAR SW state.
Disconnect the Tailgate Flip-Up Glass Ajar Switch connector.
Does the scan tool display FLIP-UP AJAR SW: FALSE?
Yes
>> Replace the Flip-up Glass Ajar Switch.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
No
>> Go To 2
2.
CHECK FOR (G80) FLIP-UP GLASS AJAR SWITCH SENSE CIRCUIT SHORT TO GROUND
Disconnect the Body Control Module C1 harness connector.
Using a 12–volt test light connected to 12–volts, test the (G80) Flip-Up
Glass Ajar Switch Sense circuit for a short to ground.
Does the test light illuminate brightly?
No
>> Replace the Body Control Module in accordance with ser-
vice information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
Yes
>> Repair the (G80) Flip-up Glass Ajar Switch Sense circuit for
a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
8L - 130
LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS
KJ
*HOOD AJAR CIRCUIT OPEN – EXPORT ONLY
For a complete wiring diagram Refer to Section 8W.
KJ
LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS
8L - 131
Theory of Operation
The scan tool will display the door state NOT the switch state. It will display as True/False. True states that the door
is ajar (open). False states that the door is NOT ajar (closed).
Possible Causes
HOOD AJAR SWITCH GROUND CIRCUIT OPEN
(G70) HOOD AJAR SWITCH SENSE CIRCUIT OPEN
FLIP-UP GLASS AJAR SWITCH
BODY CONTROL MODULE
Diagnostic Test
1.
FLIP-UP GLASS AJAR FUNCTIONAL TEST
Open the Hood.
With the scan tool in Data Display, read the FLIP-UP AJAR SW state.
Does the scan tool display TRUE?
Yes
>> The condition that caused this symptom is currently not present. Inspect the related wiring harness for
a possible intermittent condition. Look for any chafed, pierced, pinched or partially broken wires.
No
>> Go To 2
2.
OPEN HOOD AJAR SWITCH GROUND CIRCUIT
Disconnect the Hood Ajar switch connector.
Using a 12-volt Test Light connected to 12-volts, test the Ground circuit.
Does the test light illuminate brightly?
Yes
>> Go To 3
No
>> Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
8L - 132
LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS
KJ
3.
CHECK FOR OPEN HOOD AJAR SWITCH
With the scan tool in Data Display, read the HOOD AJAR SW state.
Connect a jumper wire between the Sense circuit and the Ground circuit
in the Hood Ajar Switch connector.
Does the scan tool display HOOD AJAR SW: TRUE?
Yes
>> Replace the Hood Ajar Switch.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
No
>> Go To 4
4.
CHECK FOR OPEN (G70) HOOD AJAR SWITCH SENSE CIRCUIT
Turn the ignition off.
Leave the jumper wire from the previous step connected.
Disconnect the Body Control Module C1 harness connector.
Measure the resistance between ground and the (G70) Hood Ajar
Switch Sense circuit in the BCM C1 connector.
Is the resistance below 5.0 ohms?
Yes
>> Replace the Body Control Module in accordance with ser-
vice information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
No
>> Repair the (G70) Hood Ajar Switch Sense circuit for an
open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
KJ
LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS
8L - 133
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