U1149-LOST COMMUNICATION WITH MULTIFUNCTION SWITCH
U1149-LOST COMMUNICATION WITH MULTIFUNCTION SWITCH
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For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
With the ignition on.
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Set Condition:
The Cluster does not receive information from the Left Multifunction Switch.
Possible Causes |
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| (D506) LIN BUS CIRCUIT OPEN |
| (F943) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN |
| (A412) FUSED B(+) (I.O.D.) CIRCUIT OPEN |
| (Z910) GROUND CIRCUIT OPEN |
| LEFT MULTIFUNCTION SWITCH |
| CLUSTER |
| 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.
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| 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 5.0 volts?
Yes
- Go To 3
No
- Repair the (D506) LIN BUS circuit for an open.
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Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)
- Standard Procedure).
3. (F943) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN
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| 1. | Turn the ignition on. |
| 2. | Measure the voltage of the (F943) Fused RUN/START Relay Output circuit at the Left Multifunction Switch C1 harness connector. |
Is the voltage above 10 volts?
Yes
- Go To 4
No
- Repair the open in the (F943) Fused RUN/START Relay Output circuit.
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Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)
- Standard Procedure).
4. (A412) FUSED B(+) (I.O.D.) CIRCUIT OPEN
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| 1. | Turn the ignition on. |
| 2. | Measure the voltage of the (A412) Fused B+ (I.O.D.) circuit at the Left Multifunction Switch C1 harness connector. |
Is the voltage above 10 volts?
Yes
- Go To 5
No
- Repair the open in the (A412) Fused B+ (I.O.D.) circuit.
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Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)
- Standard Procedure).
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| 1. | Turn the ignition off. |
| 2. | Measure the resistance between ground and the (Z910) Ground circuit at the Left Multifunction Switch C1 harness connector. |
Is the resistance below 5.0 Ohms?
Yes
- Replace the Left Multifunction Switch in accordance with the service information.
- Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).
No
- Repair the open in the (Z910) ground circuit.
-
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM)
- Standard Procedure).