Cabin Compartment Node (CCN)

U1149-LOST COMMUNICATION WITH MULTIFUNCTION SWITCH





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on.

- Set Condition:
The Cluster does not receive information from the Left Multifunction Switch.





Diagnostic Test

1. CHECK FOR AN ACTIVE 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.

2. (D506) LIN BUS CIRCUIT OPEN




1. Turn the ignition off.
2. Disconnect the Left Multifunction Switch harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (D506) LIN Bus circuit at the Left Multifunction Switch harness connector.

Is the voltage above 5.0 volts?

Yes

- Go To 3

No

- Repair the open in the (D506) LIN Bus circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. (F943) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN




1. Measure the voltage of the (F943) Fused Ignition Switch Output circuit at the Left Multifunction Switch harness connector.

Is the voltage above 10.0 volts?

Yes

- Go To 4

No

- Repair the open in the (F943) Fused Ignition Switch Output circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. (A412) FUSED B(+) CIRCUIT OPEN




1. Measure the voltage of the (A412) Fused B(+) circuit at the Left Multifunction Switch harness connector.

Is the voltage above 10.0 volts?

Yes

- Go To 5

No

- Repair the open in the (A412) Fused B(+) circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. (Z905) GROUND CIRCUIT OPEN




1. Measure the resistance between ground and the (Z905) Ground circuit at the Left Multifunction Switch harness connector.

Is the resistance below 5.0 Ohms?

Yes

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

No

- Repair the open in the (Z905) Ground circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.