U1149-LOST COMMUNICATION WITH MULTIFUNCTION SWITCH (STEERING CONTROL MODULE)For a complete wiring diagram Refer to Section 8W.When Monitored:With the ignition on.Set Condition:The Cluster does not receive information from the Steering Control Module.
Possible Causes(D506) LIN BUS CIRCUIT OPEN(F943) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN(A412) FUSED B(+) (I.O.D.) CIRCUIT OPEN(Z910) GROUND CIRCUIT OPENSTEERING CONTROL MODULE CLUSTER
Diagnostic Test1.CHECK FOR AN ACTIVE DTCTurn the ignition on.With the scan tool, record and erase DTCs.Wait 30 seconds.With the scan tool, read DTCs.Does the scan tool display this DTC as active?YesGo To 2NoThe condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed,
pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)2. (D506) LIN BUS CIRCUIT Turn the ignition off.Disconnect the Steering Control Module harness connector.Turn the ignition on.Measure the voltage of the (D506) LIN BUS circuit.Is the voltage above 5 volts?YesGo To 4NoGo To 33. (D506) LIN BUS CIRCUIT OPENTurn the ignition off.Disconnect the Cluster C2 harness connector.Measure the resistance of the (D506) LIN BUS circuit.Is the resistance below 10K ohms?YesReplace the Cluster in accordance with the service information.Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)NoRepair the (D506) LIN BUS circuit for an open.Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)4. (F943) FUSED RUN/START RELAY OUTPUT CIRCUIT OPENTurn the ignition on.Using a 12-volt test light connected to ground, check the (F943) Fused RUN/START Relay Output circuit at the Steering Control Module harness connector.Does the test light illuminate brightly?YesGo To 5NoRepair the (F943) Fused RUN/START Relay Output circuit for an open.Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)5. (A412) FUSED B(+) (I.O.D.) CIRCUIT OPENTurn the ignition on.Using a 12-volt test light connected to ground, check the (A412) Fused B+ (I.O.D.) circuit at the Steering Control Module harness connector.Does the test light illuminate brightly?YesGo To 6NoRepair the (A412) Fused B+ (I.O.D.) circuit for an open.Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)6.(Z910) GROUND CIRCUIT OPENTurn the ignition off.Using a 12-volt test light connected to 12-volts, check the (Z910) Ground circuit at the Steering Control Module harness connector.Does the test light illuminate brightly?YesReplace the Steering Control Module in accordance with the service information.Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)NoRepair the (Z916) ground circuit for an open.Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)