U1149

U1149-LOST COMMUNICATION WITH MULTI-FUNCTION SWITCH





For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
With the ignition on.

- Set Condition:
The Cluster does not receive any LIN Bus messages from the SCM.





Diagnostic Test

1. CHECK FOR AN ACTIVE DTC
Turn 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?

Yes

- Go to 2

No

- The 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. Body Verification Test

2. (D506) LIN BUS CIRCUIT OPEN




Turn the ignition off.
Disconnect the Steering Column Module C1 harness connector.
Turn the ignition on.
Measure the voltage of the (D506) LIN BUS circuit.
Is the voltage above 5 volts?

Yes

- Go to 3

No

- Repair the (D506) LIN BUS circuit for an open
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. (F202) FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT OPEN




Measure the voltage of the (F202) Fused Ignition Switch Output (RUN/START) circuit.
Is the voltage above 10 volts?

Yes

- Go to 4

No

- Repair the (F202) Fused Ignition Switch Output (RUN/START) circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

4. (A411) FUSED B+ (I.O.D.) CIRCUIT OPEN




Measure the voltage of the (A411) Fused B+ (I.O.D.) circuit.
Is the voltage above 10 volts?

Yes

- Go to 5

No

- Repair the (A411) Fused B+ (I.O.D.) circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

5. (Z910) GROUND CIRCUIT OPEN




Measure the resistance between ground and the (Z910) Ground circuit.
Is the resistance below 10K ohms?

Yes

- Replace the SCM.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the (Z910) ground circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test