Jeep Grand Cherokee WK. Manual — part 1525
C1405-TRANSFER CASE RANGE POSITION SENSOR CIRCUIT HIGH (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:
The sensor voltage is above a specified value for a calibrated amount of time.
Possible Causes
INTERMITTENT TRANSFER CASE RANGE POSITION SENSOR CIRCUIT HIGH
(K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
(T313) MODE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
(T313) MODE SENSOR SIGNAL CIRCUIT OPEN
(K594) DRIVETRAIN SENSOR RETURN CIRCUIT OPEN
TRANSFER CASE MOTOR
FINAL DRIVE CONTROL MODULE
Diagnostic Test
1.
T-CASE POSITION SENSOR VOLTAGE ABOVE 4.8 VOLTS
Ignition on, engine not running.
With the scan tool under Data Display, read the T-Case Position Sensor voltage.
Is the voltage above 4.8 volts?
Yes
>> Go To 2
No
>> Go to 8
2.
(K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Transfer Case Motor harness connector.
Turn the ignition on.
Measure the voltage of the (K504) Drivetrain 5 Volt Supply circuit.
Is the voltage above 5.5 volts?
Yes
>> Repair the (K504) Drivetrain 5 Volt Supply circuit for a
short to voltage.
Perform the TRANSFER CASE VERIFICATION TEST-
VER 1.
No
>> Go to 3
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TRANSFER CASE - ELECTRICAL DIAGNOSTICS
WK
C1405-TRANSFER CASE RANGE POSITION SENSOR CIRCUIT HIGH (CONTINUED)
3.
(T313) MODE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
Measure the voltage of the (T313) Mode Sensor Signal circuit.
Is the voltage above 5.5 volts?
Yes
>> Repair the (T313) Mode Sensor Signal circuit for a short to
voltage.
Perform the TRANSFER CASE VERIFICATION TEST-
VER 1.
No
>> Go to 4
4.
TRANSFER CASE MOTOR
Turn the ignition off.
Connect a jumper wire between the (K594) Drivetrain Sensor Return
circuit and the (T313) Mode Sensor Signal circuit in the Transfer Case
Motor harness connector.
Turn the ignition on.
With the scan tool under Data Display, read the T-Case Position Sen-
sor voltage.
NOTE: Remove the jumper wire before continuing.
Is the voltage below 0.2 volts?
Yes
>> Replace the Transfer Case Motor.
Perform the TRANSFER CASE VERIFICATION TEST-
VER 1.
No
>> Go to 5
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TRANSFER CASE - ELECTRICAL DIAGNOSTICS
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C1405-TRANSFER CASE RANGE POSITION SENSOR CIRCUIT HIGH (CONTINUED)
5.
(T313) MODE SENSOR SIGNAL CIRCUIT OPEN
Turn the ignition off.
Disconnect the Final Drive Control Module C2 harness connector.
Measure the resistance of the (T313) Mode Sensor Signal circuit.
Is the resistance above 5.0 ohms?
Yes
>> Repair the (T313) Mode Sensor Signal circuit for an open.
Perform the TRANSFER CASE VERIFICATION TEST-
VER 1.
No
>> Go to 6
6.
(K594) DRIVETRAIN SENSOR RETURN CIRCUIT OPEN
Measure the resistance of the (K594) Drivetrain Sensor Return circuit.
Yes
>> Repair the (K594) Drivetrain Sensor Return circuit for an
open.
Perform the TRANSFER CASE VERIFICATION TEST-
VER 1.
No
>> Go to 7
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C1405-TRANSFER CASE RANGE POSITION SENSOR CIRCUIT HIGH (CONTINUED)
7.
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.
8.
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
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