U1149

U1149-LOST COMMUNICATION WITH MULTIFUNCTION SWITCH







- When Monitored:
With the ignition on.

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





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




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.

Is the voltage above 5.0 volts?

Yes

- Go To 4

No

- Go To 3

3. (D506) LIN BUS CIRCUIT OPEN BETWEEN THE CLUSTER AND LEFT MULTIFUNCTION SWITCH




1. Turn the ignition off.
2. Disconnect the Cluster C2 harness connector.
3. Measure the resistance of the (D506) LIN BUS circuit.

Is the resistance below 5.0 Ohms?

Yes

- Replace the Cluster.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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

4. (F943) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN




1. Measure the voltage of the (F943) Fused RUN/START Relay Output 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 (F943) Fused RUN/START Relay Output.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. (Z910) GROUND CIRCUIT OPEN




1. Turn the ignition off.
2. Measure the resistance between ground and the (Z910) 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 (Z910) ground circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.