AWD System Does Not Work And The Light Is Off On The Instrument Panel

WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.

1	COMPONENT CONCERNED	CHECK DATA USING DIAGNOSIS EQUIPMENT	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
1	Traction control module	Connect the diagnostic equipment and save the report with the vehicle information	Go to Step 2	-	-
2	COMPONENT CONCERNED	CHECK REAR DIFFERENTIAL CLASSIFICATION	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
2	Rear differential	Connect the diagnosis equipment and check the rear differential classification	Go to Step 3	-	Position the vehicle on the lift and check that the value detected using the diagnostic equipment corresponds to the number printed on the label present on the rear differential.
3	COMPONENT CONCERNED	ROAD TEST	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
3	Test on vehicle	Perform a road test with the customer after having connected the diagnostic equipment. Check the AWD (4Hi) state signal with selector at AUTO. Test the vehicle in all AWD modes as shown below: - drive the vehicle and hold the speed higher than 40 km/h (25 mph) on a straight road. Check that the signal switches to 2WD. Proceed in this manner and then press the lock button. The signal should become: 4WD Lock.	Go to Step 4	Presence of errors related to the all-wheel drive	Proceed as instructed by the diagnostic equipment and perform general checks
4	COMPONENT CONCERNED	CHECK ALL-WHEEL DRIVE ACTUATOR OPERATION	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
4	PTU motor	Connect the diagnostic equipment, road test the vehicle and check for presence of error C2270-77, then check integrity of the all-wheel drive actuator gear	Go to Step 5	Gear not functioning	The intermediate gear of the all-wheel drive actuator has a damaged tooth. Replace the PTU.
5	COMPONENT CONCERNED	CHECK OPERATION USING DIAGNOSIS EQUIPMENT	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
5	Rear differential	Connect the diagnosis equipment and check for the presence of error C2230-98	Go to Step 6	Presence of error C2230-98	Position the vehicle on the lift, try to extract the right driveshaft in axial direction towards the wheel: if the displacement is equal to or greater than 1 cm replace the rear differential and run the initialization procedure.
6	COMPONENT CONCERNED	CHECK OPERATION USING DIAGNOSIS EQUIPMENT	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
6	Rear differential	Connect the diagnosis equipment and check for the presence of error C2210-92	Go to Step 7	Presence of error C2210-92	This type of error could be the consequence of having replaced the rear differential without having run the initialization procedure. Run the initialization procedure and perform a road test.
7	COMPONENT CONCERNED	CHECK AXIAL AND RADIAL BACKLASH OF THE PROPELLER SHAFT	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
7	Propeller shaft	Check axial and radial backlash between the propeller shaft and PTU	Go to Step 8	Presence of axial and radial backlash	In presence of axial backlash, check state of seals and O-Rings, that they are correctly positioned in their housings and that they are not damaged or missing. If needed, replace and run a road test. In presence of radial backlash between the propeller shaft and PTU remove the tear wheel drive transmission shaft and check wear by inspecting the inner race (PTU side) and the outer race (propeller shaft side). Collect information on the concerned unit and then contact FCA to learn how to proceed. Replace all parts in all cases.
8	COMPONENT CONCERNED	CHECK AXIAL AND RADIAL BACKLASH OF THE PROPELLER SHAFT	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
8	Propeller shaft	Check axial and radial backlash between the propeller shaft and PTU	Go to Step 9	Presence of axial and radial backlash	In presence of axial backlash, check state of the O-Ring, that it is correctly positioned in its housing and that it is not damaged or missing. Test the vehicle on the road and check that the problem is solved. Visually inspect under the body checking that all components are mounted correctly. Then remove the propeller shaft, fit the ring correctly and take the vehicle for a test drive. In presence of radial backlash, remove the propeller shaft and check wear. Check the rear differential pinion. Proceed by replacing the propeller shaft.
9	COMPONENT CONCERNED	CHECK REAR DIFFERENTIAL STUB SHAFT RADIAL BACKLASH	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
9	Rear right stub shaft	Check rear differential stub shaft radial backlash	Go to Step 10	Presence of radial backlash	If the stub shaft has a radial backlash greater than 0.5 mm (0.02 in), it means that the support is worn. Extract the driveshaft and check what is causing the backlash. If the shaft moves radially, replace the rear differential.
10	COMPONENT CONCERNED	CHECK AWD COMPONENT STATE	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
10	AWD system components	Check for presence of failures or poor operation of the rear differential, of the PTU, of the propeller shaft, of the bearings and of the flexible pipes. Furthermore, check the state of driveshafts, actuators and all other AWD system components.	Go to Step 11	Presence of failures or poor operation	Presence of failures or poor operation of an AWD system component may be the consequence of improper use. Collect all information that confirm the diagnosis and replace the unit. Record all serial numbers of each inspected component.
11	COMPONENT CONCERNED	CHECK AWD COMPONENT CONNECTION	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
11	AWD system components	Check state of fasteners, seals, electric connections and all AWD component connection	Go to Step 12	Incorrect connections of AWD components	Restore tightening to torque, electric connection, sealing or any other connection or assembly according to the required procedures
12	COMPONENT CONCERNED	CHECK OIL LEAKS FROM REAR DIFFERENTIAL	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
12	Rear differential	Check for oil leaks from the rear differential	Go to Step 13	Oil leaks from rear differential	Check correct connection and operation of the breather pipe. If the breather pipe does not work (the leak must be visible from the oil seal present on the sides of the differential where the drive axle stub shafts are connected or on the propeller shaft side pinion), replace it. Perform the oil level top up procedure, if necessary. Clean the part and test the vehicle on the road to check that the problem is solved. If the breather pipe is working and correctly fitted, check the possible source of the leak: if the leaks is from the oil cap, replace it if necessary and tighten it using the correct tightening torque. Test the vehicle on the road and check that the problem is solved. Check and top up the oil level in the rear differential with the specific procedure, clean the part and take the vehicle for a test drive to check that the problem has been solved. If the leaks are still present or from other parts, replace the rear differential and carry out the initialization procedure using the diagnostic equipment.
13	COMPONENT CONCERNED	CHECK FOR OIL LEAKS FROM THE PTU	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
13	PTU	Check for oil leaks from the PTU	Go to Step 14	Oil leaks from the PTU	Check correct connection and operation of the breather tube. If the breather tube does not work (the leak must be visible from the oil seal), replace it. Perform the oil level top up procedure, if necessary. Clean the part and test the vehicle on the road to check that the problem is solved. If the breather tube is working and correctly fitted, check the possible source of the leak: if the leaks is from the oil cap, replace it if necessary and tighten it using the correct tightening torque. Test the vehicle on the road and check that the problem is solved. If the source of the leak cannot be identified, clean the concerned parts (including the transmission), take the vehicle for a road test and check for the source of the oil leak. If the leak is from the inspection hole is under the heat guard (M/T vehicles only), replace the PTU and carry out the initialization procedure using the diagnostic equipment. If the oil comes from the inspection hole under the heat guard or from the connection between ATC transmission and PTU, fit the PTU and check the sleeve inside the differential reducer. If necessary, refit all parts, clean the PTU and test the vehicle on the road to check that the problem is solved. If the oil comes from other parts of the PTU which are not mentioned, replace the PTU and carry out the initialization procedure using the diagnostic equipment.
14	COMPONENT CONCERNED	CHECK FOR GREASE LEAKS FROM THE PTU	OK (NO FAULTS DETECTED)	FAULT DETECTED	OPERATION
14	PTU	Check for grease leaks from the PTU	End of diagnosis	Grease leaks from the PTU	Check the joint and the O-rings, if the joint is not in the correct position, reposition it, clean the parts and take the vehicle for another test drive to check that the problem has been solved. If there are still grease leaks, remove the PTU and perform a more accurate check. If damage is found, replace the PTU and run the initialization procedure by means of the diagnostic equipment. If there is grease leak from the propeller shaft, check the joint, if it is not in the correct position, reposition it, clean the parts and take the vehicle for another test drive to check that the problem has been solved. Check the positioning of the O-Ring, restore it if it is wrong and test the vehicle on the road to check that the problem is solved. If it is in an incorrect position again, carry out additional checks and replace it with a new one.