Dodge Caliber. Manual — part 66
U1120-LOST WHEEL SPEED MESSAGES
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Ignition on.
•
Set Condition:
The AWD doesn’t receive a vehicle speed signal from the Anti-lock brake Module over the CAN C bus.
Possible Causes
CAN C BUS CIRCUIT OPEN OR SHORTED
ANTI-LOCK BRAKE (ABS) MODULE
ALL WHEEL DRIVE (AWD) CONTROL MODULE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING) .
Theory of Operation
The AWD receives the wheel speed signal over the CAN C bus from the Anti-lock Brake Module.
Diagnostic Test
1.
ACTIVE DTC
NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The
screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting
any of the network components allows access to the source of the problem.
Ignition on, engine not running.
With a scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
>> Go To 2
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELEC-
TRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)
2.
U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE ALSO SET
With a scan tool, select View DTCs.
Is the DTC U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE also set?
Yes
>> Perform the diagnostic procedure for U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MOD-
ULE.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELEC-
TRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)
No
>> Replace the AWD Control Module in accordance with the Service information.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELEC-
TRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE).
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CLUTCH-ELECTRONICALLY CONTROLLED-ELECTRICAL DIAGNOSTICS
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U1415-IMPLAUSIBLE/MISSING VEHICLE CONFIGURATION RECEIVED
For a complete wiring diagram Refer to Section 8W
•
When Monitored:
Continuously with the ignition on.
•
Set Condition:
When the All Wheel Drive (AWD) Module detects an incorrect CAN messages from the Engine Control Module
(ECM).
Possible Causes
TOTALLY INTEGRATED POWER MODULE (TIPM) NOT CONFIGURED CORRECTLY
TIPM CAN BUS DTCS
ENGINE DTCS
ALL WHEEL DRIVE (AWD) CONTROL MODULE
Diagnostic Test
1.
CHECK IF TIPM CAN BUS DTC’S ARE PRESENT
With the scan tool, read TIPM DTCs.
Are there any TIPM CAN BUS DTC’s present?
Yes
>> Refer to 8-ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING and diag-
nose the appropriate symptom.
Perform AWD VERIFICATION TEST - VER 1. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELECTRON-
ICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)
No
>> Go To 2
2.
CHECK IF ENGINE DTC’S ARE PRESENT
With the scan tool, read Engine DTCs.
Are there any Engine DTC’s present?
Yes
>> Refer to the 9 - ENGINE ELECTRICAL DIAGNOSTICS and diagnose the appropriate symptom.
Perform AWD VERIFICATION TEST - VER.
No
>> Using the schematics as a guide, check the AWD Module pins, terminals, and connectors for corrosion,
damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems
are found, replace the AWD Module per the Service Information.
Perform AWD VERIFICATION TEST - VER. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELECTRONI-
CALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)
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CLUTCH-ELECTRONICALLY CONTROLLED-ELECTRICAL DIAGNOSTICS
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STANDARD PROCEDURE
AWD - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE
For a complete wiring diagram Refer to Section 8W.
Perform the following pre-diagnostic troubleshooting procedures prior to performing any diagnostic test.
Always perform diagnostics with a fully charged battery to avoid false symptoms.
1. With the scan tool, read ABS DTCs. If ABS DTCs are present, (Refer to 5 - BRAKES - DIAGNOSIS AND TEST-
ING) and perform to the appropriate diagnostic procedure(s) before proceeding.
2. Check the vehicles repair history.
3. If the vehicle has a repair history that pertains to the customer’s current complaint, review the repair.
4. Check for any TSBs related to the customer’s complaint.
5. Inspect the vehicle for any aftermarket accessories that may have been installed incorrectly.
6. With the scan tool, read All Wheel Drive (AWD) Control Module DTCs. Record all Stored, Active, and Pending
DTC information. Diagnose any Pending DTC as a matured DTC.
7. Use the wiring diagram as a guide, inspect the wiring and connectors related to this circuit and repair as nec-
essary.
8. Refer to the When Monitored and Set Conditions for this DTC. DTCs can set at ignition on, at start up, driving
under specific conditions, and after controller diagnostic monitors have run or otherwise know as a Good Trip.
9. Check for any Service Information Tune-ups or Service Bulletins for any possible causes that may apply. Check
for controller software update information. Some conditions can be corrected by upgrading the Engine (PCM)
controller software.
1.
Did any of the above procedures repair the vehicle?
Yes
>> Testing is complete.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELEC-
TRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)
No
>> Refer to the identified category and perform the appropriate symptom(s). (Refer to 3 - DIFFERENTIAL
& DRIVELINE/ELECTRONICALLY CONTROLLED CLUTCH - DIAGNOSIS AND TESTING)
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CLUTCH-ELECTRONICALLY CONTROLLED-ELECTRICAL DIAGNOSTICS
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AWD CONTROL MODULE VERIFICATION TEST
Diagnostic Test
1.
AWD CONTROL MODULE VERIFICATION TEST
Disconnect all jumper wires and reconnect all previously disconnected components and connectors.
With the scan tool, select Clear Stored DTCs.
Make sure that all accessories are turned off and that the battery is fully charged.
Test drive the vehicle and verify proper operation.
With the scan tool, select View DTCs in the AWD Control Module.
Are there any DTCs present in the AWD Control Module?
Yes
>> Return to the symptom list and perform the appropriate diagnostic test.
No
>> Repair is complete.
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