Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: HVAC Schematics DEFINITION: The steering wheel temperature and/or the blower motor switch will not adjust the HVAC temperatures and/or the blower speeds. No DTCs have been set. | ||||
1 | Did you perform the HVAC Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Do the counts change for any switch pressed? | -- | Go to Step 3 | Go to Step 5 |
3 |
Do the counts change for all switches pressed? | -- | Go to Step 4 | Go to Step 9 |
4 |
Do the radio steering wheel controls work correctly? | -- | Go to Too Hot in Vehicle or Too Cold in Vehicle | Go to Step 10 |
5 |
Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.
Do the counts change? | -- | Go to Step 9 | Go to Step 6 |
6 | Measure the voltage from the battery positive voltage circuit connector at the steering wheel control circuit to a good ground. Does the voltage measure near the specified value? | 12 V | Go to Step 7 | Go to Step 8 |
7 | Test the steering wheel controls signal circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 10 |
8 | Test the battery positive voltage circuit of the steering wheel controls for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 10 |
9 | Inspect for poor connections at the harness connector of the steering wheel control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 11 |
10 | Inspect for poor connections at the harness connector of the instrument panel cluster. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 13 | Go to Step 12 |
11 | Replace the steering wheel control switch. Refer to Steering Wheel Control Switch Assembly Replacement in Steering Wheel and Column. Did you complete the replacement? | -- | Go to Step 14 | -- |
12 | Replace the instrument panel cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gages and Console. Did you complete the replacement? | -- | Go to Step 13 | -- |
13 | Enable the SIR system. Refer to Enabling the SIR System in SIR. Is the SIR system enabled? | -- | Go to Step 14 | -- |
14 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
