Jeep Liberty KJ. Manual — part 68
*INSTRUMENT CLUSTER INOPERATIVE
For a complete wiring diagram Refer to Section 8W.
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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
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Possible Causes
(F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT SHORT TO GROUND
(F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
(Z18) INSTRUMENT CLUSTER GROUND CIRCUIT OPEN
INSTRUMENT CLUSTER
Diagnostic Test
1.
(F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT SHORT TO GROUND
Turn the ignition off.
Remove and inspect the #13 Fuse in the Junction Block.
If the fuse is open, replace with proper rated fuse.
Turn the ignition on for 1 minute.
Turn the ignition off.
Remove and inspect the #13 Fuse in the Junction Block.
Is the fuse open?
Yes
>> Repair the (F942) Fused Ignition Switch Output circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 2
2.
(F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Turn the ignition on.
Measure the voltage between (F942) Fused Ignition Switch Output cir-
cuit and ground.
Is the voltage above 10.5 volts?
Yes
>> Go To 3
No
>> Repair the (F942) Fused Ignition Switch Output circuit for
an open.
Perform BODY VERIFICATION TEST - VER 1.
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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
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3.
(Z18) INSTRUMENT CLUSTER GROUND CIRCUIT OPEN
Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Measure the resistance between ground and the (Z18) Instrument Clus-
ter Ground circuit.
Is the resistance below 5.0 ohms?
Yes
>> Replace and configure the Instrument Cluster in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Repair the (Z18) Instrument Cluster Ground circuit for an
open.
Perform BODY VERIFICATION TEST - VER 1.
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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
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*LOW COOLANT INDICATOR ALWAYS ON - DIESEL ONLY
For a complete wiring diagram Refer to Section 8W.
Possible Causes
LOW COOLANT LEVEL SWITCH
(G18) LOW COOLANT FLUID LEVEL SENSE CIRCUIT SHORT TO GROUND
INSTRUMENT CLUSTER
Diagnostic Test
1.
LOW COOLANT LEVEL SWITCH
NOTE: Ensure that the coolant is filled to the proper level before proceeding with this test.
Disconnect the Low Coolant Level Switch harness connector.
With the scan tool in Inputs/Outputs, read the Low Coolant Switch state.
Does the scan tool display: Closed?
Yes
>> Go To 2
No
>> Replace the Low Coolant Switch in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
2.
(G18) LOW COOLANT FLUID LEVEL SENSE CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the Low Coolant Level Switch harness connector.
Disconnect the Instrument Cluster harness connector.
Measure the resistance between ground and the (G18) Low Coolant
Fluid Level Sense circuit.
Is the resistance below 5.0 ohms?
Yes
>> Repair the (G18) Low Coolant Fluid Level Sense circuit for
a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
No
>> Replace and configure the Instrument Cluster in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
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