U1149

U1149-LOST COMMUNICATION WITH MULTI-FUNCTION SWITCH







- When Monitored:
With the ignition on.

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





1. CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)

NOTE: Before proceeding with this diagnostic procedure, verify the Left and Right Multifunction Switch and Clockspring harness connectors are properly seated and verify proper pin terminal tension. A loose connection at any of these connectors may cause this DTC to set.

1. Turn the ignition on.
2. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (D506) LIN BUS CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Left Multifunction Switch C1 harness connector.
3. Turn the ignition on.
4. 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 the BODY VERIFICATION TEST. Body Verification Test.

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




1. 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 the BODY VERIFICATION TEST. Body Verification Test.

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




1. 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 the BODY VERIFICATION TEST. Body Verification Test.

5. (Z910) GROUND CIRCUIT OPEN




1. Measure the resistance between ground and the (Z910) Ground circuit.

Is the resistance below 10K Ohms?

Yes

- Replace the Left Multifunction Switch.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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