Jeep Grand Cherokee WK. Manual — part 1519
C1400-TRANSFER CASE RANGE SELECT SWITCH PERFORMANCE (CONTINUED)
3.
(K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT OPEN
Turn the ignition off.
Disconnect the Final Drive Control Module C2 harness connector.
Measure the resistance of the (K504) Drivetrain 5 Volt Supply circuit.
Is the resistance greater than 5.0 ohms?
Yes
>> Repair the (K504) Drivetrain 5 Volt Supply circuit for an
open.
Perform the TRANSFER CASE VERIFICATION TEST-
VER 1.
No
>> Go To 4
4.
(K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
Measure the resistance between the (K504) Drivetrain 5 Volt Supply
circuit and ground.
Is the resistance less than 5.0 ohms?
Yes
>> Repair the (K504) Drivetrain 5 Volt Supply circuit for a
short to ground.
Perform the TRANSFER CASE VERIFICATION TEST-
VER 1.
No
>> Go To 8
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TRANSFER CASE - ELECTRICAL DIAGNOSTICS
WK
C1400-TRANSFER CASE RANGE SELECT SWITCH PERFORMANCE (CONTINUED)
5.
TRANSFER CASE SELECTOR SWITCH
Ignition on, engine not running.
With the scan tool in Data Display, read the 4wd Range Switch Volt-
age with the Transfer Case Selector Switch connector disconnected.
The switch voltage should be approximately 0 volts.
Turn the ignition off.
Connect a jumper wire between the (K504) Drivetrain 5 Volt Supply
circuit and the (K977) Mode Select circuit in the Transfer Case Selec-
tor Switch connector.
Ignition on, engine not running.
With the scan tool in Data Display, read the 4wd Range Switch Volt-
age.
The switch voltage should be approximately 5 volts.
Does the voltage display as described?
Yes
>> Replace the Transfer Case Selector Switch.
Perform the TRANSFER CASE VERIFICATION TEST-
VER 1.
No
>> Go To 6
6.
(K977) MODE SELECT CIRCUIT OPEN
Turn the ignition off.
Disconnect the Final Drive Control Module C2 connector.
Measure the resistance of the (K977) Mode Select circuit between the
Transfer Case Selector Switch connector and the Final Drive Control
Module C2 harness connector.
Is the resistance above 5.0 ohms?
Yes
>> Repair the (K977) Mode Select circuit for an open.
Perform the TRANSFER CASE VERIFICATION TEST-
VER 1.
No
>> Go To 7
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TRANSFER CASE - ELECTRICAL DIAGNOSTICS
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C1400-TRANSFER CASE RANGE SELECT SWITCH PERFORMANCE (CONTINUED)
7.
(K977) MODE SELECT CIRCUIT SHORT TO GROUND
Measure the resistance between the (K977) Mode Select circuit and
ground.
Is the resistance less than 5.0 ohms?
Yes
>> Repair the (K977) Mode Select circuit for a short to
ground.
Perform the TRANSFER CASE VERIFICATION TEST-
VER 1.
No
>> Go To 8
8.
FINAL DRIVE CONTROL MODULE
View repair.
Repair
Replace the Final Drive Control Module in accordance with the Service Information.
Perform the VERIFICATION TEST-VER 1.
9.
INTERMITTENT TRANSFER CASE RANGE SELECT SWITCH PERFORMANCE
The conditions necessary to set this DTC are not present at this time.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
While monitoring the scan tool data relative to this circuit, wiggle test the wiring and connectors.
Look for the data to change or for the DTC to reset during the wiggle test.
While monitoring the scan tool data relative to this circuit, move the selector switch to each position several times.
Look for the data to change other than as expected or for the DTC to reset.
Were any problems found?
Yes
>> Repair as necessary.
Perform the TRANSFER CASE VERIFICATION TEST-VER 1.
No
>> Test complete.
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TRANSFER CASE - ELECTRICAL DIAGNOSTICS
WK
C1401-TRANSFER CASE RANGE SELECT SWITCH CIRCUIT LOW
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TRANSFER CASE - ELECTRICAL DIAGNOSTICS
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