Jeep Liberty KJ. Manual — part 54
2.
(G150) INSTRUMENT CLUSTER WAKE UP SIGNAL CIRCUIT OPEN
Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Disconnect the BCM C1 harness connector.
Measure the resistance of the (G150) Instrument Cluster Wake Up Sig-
nal circuit.
Is the resistance above 5.0 ohms?
Yes
>> Repair the (G150) Instrument Cluster Wake Up Signal cir-
cuit for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
No
>> Go To 3
3.
(G150) CLUSTER WAKE UP CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Disconnect the BCM C1 harness connector.
Measure the resistance between ground and the (G150) Cluster Wake
Up circuit.
Is the resistance below 5.0 ohms?
Yes
>> Repair the (G150) Instrument Cluster Wake Up Signal cir-
cuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
No
>> Go To 4
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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
KJ
4.
BODY CONTROL MODULE
Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Ensure that the BCM C1 harness connector is connected.
Install a DVOM between the Cluster Wake Up circuit of the Instrument
Cluster harness connector and ground.
Set the DVOM to read resistance.
Turn the ignition on.
With the scan tool, select Body Control Module, then Actuators.
Observe the DVOM while using the scan tool to actuate the Cluster
Wake Up
9
on.
9
Did the DVOM indicate a brief (2 second) continuity to ground?
Yes
>> Go To 5
No
>> Replace and program the Body Control Module in accor-
dance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
5.
INSTRUMENT CLUSTER
Turn the ignition off.
Ensure that the Instrument Cluster and BCM C1 harness connectors are connected.
Open the driver door or actuate the High Beam Headlamps with the key off.
With the scan tool, read DTCs.
Did this DTC reset?
Yes
>> 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)
No
>> The condition is not present at this time. Monitor scan tool DTCs while wiggling the related wire har-
ness. Refer to any Technical Service Bulletins (TSB) that may apply. Visually inspect the related wiring
harness and connector terminals.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
8J - 23
FUEL SENSOR FAULTED LOW (BCM)
For a complete wiring diagram Refer to Section 8W
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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
KJ
•
When Monitored:
Ignition on and battery voltage above 10.4 volts.
•
Set Condition:
The fuel level sensor signal voltage goes below 0.0196 of a volt for more than 90 seconds.
Possible Causes
FUEL LEVEL SENSOR VOLTAGE BELOW 0.0196 OF A VOLT
FUEL LEVEL SENSOR
(N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO GROUND
(N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT
PCM
Diagnostic Test
1.
FUEL LEVEL SENSOR VOLTS BELOW 0.0196 VOLT
Ignition on, engine not running.
With the scan tool, read DTCs and record the related Freeze Frame data.
With the scan tool, read the Fuel Level Sensor voltage.
Is the Fuel Level Sensor voltage below 0.0196 of a volt?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure).
Perform POWERTRAIN VERIFICATION TEST VER - 5. (Refer to 9 - ENGINE - STANDARD PROCE-
DURE)
2.
FUEL LEVEL SENSOR
Turn the ignition off.
Disconnect the Fuel Pump Module harness connector.
Ignition on, engine not running.
With the scan tool, read the Fuel Level Sensor voltage.
Did the Fuel Level Sensor voltage change from below 0.4 of a
volt to above 4.0 volts?
Yes
>> Replace the Fuel Level Sensor in accordance with the Ser-
vice Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
(Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 3
3.
DETERMINE VEHICLE ENGINE TYPE
What type of engine is the vehicle equipped with?
Gas
>> Go To 4
Gas (ESP)
Go To 7
Diesel
Go To 10
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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
8J - 25
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