Jeep Liberty KJ. Manual — part 65
*4WD INDICATOR INACCURATE - DIESEL ONLY
For a complete wiring diagram Refer to Section 8W.
Possible Causes
4WD MODE SENSOR DTC PRESENT
INTERMITTENT CONDITION
TRANSFER CASE POSITION SENSOR
INSTRUMENT CLUSTER
Diagnostic Test
1.
4WD MODE SENSOR DTC PRESENT
NOTE: With the scan tool, ensure that the Instrument Cluster is configured for the correct transfer case
before proceeding with this test.
With the scan tool, read DTCs.
Does the scan tool display any 4WD Mode Sensor DTCs?
Yes
>> Refer to the DRIVEABILITY category and perform the appropriate symptom.
No
>> Go To 2
2.
INSTRUMENT CLUSTER
Perform the Instrument Cluster Self Test.
Depress and hold the Trip Odometer reset button while turning the ignition from the off to the on position.
Did the 4WD indicator in question illuminate?
Yes
>> Go To 3
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)
3.
TRANSFER CASE POSITION SENSOR
Turn the ignition on.
With the scan tool in Sensors, read the T-Case Position while moving the transfer case shift lever through all of the
positions.
The scan tool should display the following values:
4WD Lo: 0.15 - 0.40 volts
Neutral: 0.68 - 0.98 volts
Full Time: 1.23 - 1.56 volts
Part Time: 1.78 - 2.12 volts
2WD: 2.43 - 2.77 volts
Is the Transfer Case Position voltage within the specified ranges?
Yes
>> The condition is not present at this time. Monitor scan tool parameters while wiggling the related wire
harness. Refer to any Technical Service Bulletins (TSB) that may apply. Visually inspect the related wir-
ing harness and connector terminals.
No
>> Replace the Transfer Case Position Sensor in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 2. (Refer to 9 - ENGINE - DIAGNOSIS AND
TESTING)
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INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
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*ALL GAUGES INOPERATIVE
For a complete wiring diagram Refer to Section 8W.
KJ
INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
8J - 67
Possible Causes
NO RESPONSE - PCI BUS
NO RESPONSE - PCI BUS - POWERTRAIN CONTROL MODULE
NO RESPONSE - PCI BUS - INSTRUMENT CLUSTER
(F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT SHORT TO GROUND
(Z18) INSTRUMENT CLUSTER GROUND CIRCUIT OPEN
(F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
INSTRUMENT CLUSTER
Diagnostic Test
1.
NO RESPONSE - PCI BUS
Turn the ignition on.
With the scan tool, select System Monitors, then J1850 Module Scan.
Does the scan tool display: MIC PRESENT on the BUS?
Yes
>> Go To 2
No
>> Refer to the COMMUNICATION category and perform the appropriate symptom.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
2.
NO RESPONSE - PCI BUS - POWERTRAIN CONTROL MODULE
Turn the ignition on.
With the scan tool, select Body, MIC, SYSTEM TESTS, PCM Monitor.
Does the scan tool display: PCM INACTIVE on the BUS?
Yes
>> Refer to the symptom list for problems related to *NO RESPONSE FROM THE POWERTRAIN CON-
TROL MODULE.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
No
>> Go To 3
3.
NO RESPONSE - PCI BUS - INSTRUMENT CLUSTER
Turn the ignition on.
With the scan tool, select Body, MIC, MODULE DISPLAY.
Does the scan tool display: NO RESPONSE from MIC?
Yes
>> Refer to the symptom list for problems related to *NO RESPONSE FROM THE INSTRUMENT CLUS-
TER.
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
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4.
(F942) FUSED IGNITION SWITCH OUTPUT CIRCUIT SHORT TO GROUND
Turn the ignition off.
Inspect the #13 Fuse in the Junction Block.
If the fuse is open, replace with proper rated fuse.
Turn the ignition on for one minute.
Turn the ignition off.
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. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
No
>> Go To 5
5.
(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 the (F942) Fused Ignition Switch Output
circuit and ground.
Is the voltage above 10.5 volts?
Yes
>> Go To 6
No
>> Repair the (F942) Fused Ignition Switch Output circuit for
an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
6.
(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. (Refer to 8 -
ELECTRICAL/ELECTRONIC
CONTROL
MODULES
-
STANDARD PROCEDURE)
No
>> Repair (Z18) the Instrument Cluster Ground circuit for an
open.
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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