Jeep Grand Cherokee WK. Manual — part 1534
C140F-TRANSFER CASE RANGE POSITION SENSOR ERRATIC PERFORMANCE (CONTINUED)
12.
TRANSFER CASE MOTOR
NOTE: This DTC sets when the Final Drive Control Module detects excessive voltage fluctuation on the
Mode Sensor Signal circuit. Perform a thorough inspection of all wiring and connectors between the sensor
and the control module.
Using the schematic as a guide, inspect the Final Drive Control Module power and ground circuits.
Were any problems found?
Yes
>> Repair as necessary.
Perform the TRANSFER CASE VERIFICATION TEST-VER 1.
No
>> Replace the Transfer Case Motor in accordance with the Service Information.
Perform the TRANSFER CASE VERIFICATION TEST-VER 1.
13.
FINAL DRIVE CONTROL MODULE
NOTE: This DTC sets when the Final Drive Control Module detects excessive voltage fluctuation on the
Mode Sensor Signal circuit. Perform a thorough inspection of all wiring and connectors between the sensor
and the control module.
Using the schematic as a guide, inspect the Final Drive Control Module power and ground circuits.
Were any problems found?
Yes
>> Repair as necessary.
Perform the TRANSFER CASE VERIFICATION TEST-VER 1.
No
>> Replace the Final Drive Control Module in accordance with the Service Information.
Perform the TRANSFER CASE VERIFICATION TEST-VER 1.
14.
INTERMITTENT WIRING AND CONNECTORS
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.
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
C1413–4 HI/LO SELECT SWITCH CIRCUIT STUCK
WK
TRANSFER CASE - ELECTRICAL DIAGNOSTICS
21 - 947
C1413–4 HI/LO SELECT SWITCH CIRCUIT STUCK (CONTINUED)
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
With the ignition on and no system undervoltage or overvoltage condition present.
•
Set Condition:
Valid voltage for 4HI/4LO switch active present for a calibratable time or when shifter is not in neutral.
Possible Causes
INTERMITTENT 4 HI/LO SELECT SWITCH CIRCUIT STUCK DTC
TRANSFER CASE SELECTOR SWITCH
FINAL DRIVE CONTROL MODULE
Diagnostic Test
1.
NEUTRAL INDICATOR CONTROL CIRCUIT DTC IS ACTIVE
Turn the ignition on.
With the scan tool, select View DTCs in the Final Drive Control Module.
Is the status Active for this DTC?
Yes
>> Go to 2
No
>> Go to 4
2.
TRANSFER CASE SELECTOR SWITCH
Turn the ignition off.
Disconnect the Transfer Case Selector Switch.
Ignition on, engine not running.
With the scan tool, select Data Display and read the 4wd Range
Switch Voltage.
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, read the 4wd Range Switch Voltage.
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 3
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TRANSFER CASE - ELECTRICAL DIAGNOSTICS
WK
C1413–4 HI/LO SELECT SWITCH CIRCUIT STUCK (CONTINUED)
3.
FINAL DRIVE CONTROL MODULE
View repair.
Repair
Replace the Final Drive Control Module in accordance with the Service information.
Perform the TRANSFER CASE VERIFICATION TEST-VER 1.
4.
INTERMITTENT WIRING AND CONNECTORS
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.
Were any problems found?
Yes
>> Repair as necessary.
Perform the TRANSFER CASE VERIFICATION TEST-VER 1.
No
>> Test complete.
WK
TRANSFER CASE - ELECTRICAL DIAGNOSTICS
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