Jeep Grand Cherokee WK. Manual — part 1543
C230B- NEUTRAL INDICATOR CONTROL CIRCUIT HIGH
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TRANSFER CASE - ELECTRICAL DIAGNOSTICS
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C230B- NEUTRAL INDICATOR CONTROL 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 Final Drive Control Module detects high voltage on the Neutral Indicator Control Circuit when output is on.
Possible Causes
INTERMITTENT NEUTRAL INDICATOR CONTROL CIRCUIT HIGH
(G95) 4WD NEUTRAL INDICATOR CIRCUIT OPEN
(G95) 4WD NEUTRAL INDICATOR CIRCUIT SHORTED TO VOLTAGE
TRANSFER CASE SELECTOR SWIITCH
FINAL DRIVE CONTROL MODULE
Diagnostic Test
1.
NEUTRAL INDICATOR CONTROL CIRCUIT DTC IS ACTIVE
Ignition on.
With the scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
>> Go to 2
No
>> Go to 7
2.
(G95) 4WD NEUTRAL INDICATOR CIRCUIT VOLTAGE
Turn the ignition off.
Disconnect the Final Drive Control Module C2 harness connector.
Turn the ignition on.
Measure the voltage of the (G95) 4WD Neutral Indicator circuit.
Is there any voltage present?
Yes
>> Go to 3
No
>> Go to 4
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C230B- NEUTRAL INDICATOR CONTROL CIRCUIT HIGH (CONTINUED)
3.
(G95) 4WD NEUTRAL INDICATOR CIRCUIT SHORT TO VOLTAGE
Turn the ignition off.
Disconnect the Transfer Case Selector Switch harness connector.
Turn the ignition on.
Measure the voltage of the (G95) 4WD Neutral Indicator circuit.
Is there any voltage present?
Yes
>> Repair the (G95) 4WD Neutral Indicator circuit for a short
to voltage.
Perform the TRANSFER CASE VERIFICATION TEST-
VER 1.
No
>> Go to 5
4.
(G95) 4WD NEUTRAL INDICATOR CIRCUIT OPEN
Turn the ignition off.
Disconnect the Transfer Case Selector Switch connector.
Measure the resistance of the (G95) 4WD Neutral Indicator Control cir-
cuit.
Is the resistance above 5.0 ohms?
Yes
>> Repair the open (G95) 4WD Neutral Indicator circuit.
Perform the TRANSFER CASE VERIFICATION TEST-
VER 1.
No
>> Go to 6
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C230B- NEUTRAL INDICATOR CONTROL CIRCUIT HIGH (CONTINUED)
5.
TRANSFER CASE SELECTOR SWITCH
View repair.
Repair
Replace the Transfer Case Selector Switch in accordance with the Service information.
Perform the TRANSFER CASE VERIFICATION TEST-VER 1.
6.
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.
7.
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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