2007 Grand Cherokee WK Factory Service Manual 21 - TRANSMISSION AND TRANSFER CASE

C1413-4 HI/LO SELECT SWITCH CIRCUIT STUCK





For a complete wiring diagram Refer to Section 8W



Possible Causes
  
TRANSFER CASE SELECTOR SWITCH
  
FINAL DRIVE CONTROL MODULE
  



Diagnostic Test

1. NEUTRAL INDICATOR CONTROL CIRCUIT DTC IS ACTIVE

Turn the ignition off to the lock position
With the scan tool, read DTCs in the Final Drive Control Module.

Is the status Active for this DTC?

Yes


No

2. TRANSFER CASE SELECTOR SWITCH



Turn the ignition off to the lock position
Disconnect the Transfer Case Selector Switch.
Ignition on, engine not running.
With the scan tool, read the 4wd Range Switch Voltage in the Final Drive Control Module.
The switch voltage should be approximately 0.0 volts.
Turn the ignition off to the lock position
Connect a jumper wire between the (K504) Drivetrain 5-volt Supply circuit and the (K977) Mode Select circuit in the Transfer Case Selector Switch connector.
Ignition on, engine not running.
With the scan tool, read the 4wd Range Switch Voltage in the Final Drive Control Module.
The switch voltage should be approximately 5-volts.

Does the voltage display as described?

Yes


No

3. 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


No