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U1120-LOST WHEEL SPEED MESSAGES For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: 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 - 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 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- 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- No >> Replace the AWD Control Module in accordance with the Service information. Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELEC- PM CLUTCH-ELECTRONICALLY CONTROLLED-ELECTRICAL DIAGNOSTICS 3 - 139 |