Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: HVAC Schematics DEFINITION: The steering wheel temperature and/or blower motor switch will not adjust HVAC temperatures and/or 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 function? | -- | Go to Too Hot in Vehicle or Too Cold in Vehicle | Go to Step 12 |
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 11 | Go to Step 6 |
6 | Measure the voltage from the remote radio control head supply voltage circuit at the left steering wheel controls 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 at the left steering wheel controls for an open, short to ground, short to power, or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 15 | Go to Step 12 |
8 | Test the remote radio control head supply voltage circuit of the right 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 15 | Go to Step 12 |
9 | Test the remote radio control head supply voltage circuit for a short to ground or an open between the left and right steering wheel controls. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 15 | Go to Step 10 |
10 | Test the steering wheel controls signal circuit for an open between the left and right steering wheel controls. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 15 | Go to Step 11 |
11 | Inspect for poor connections at the harness connector of the left steering wheel controls. 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 15 | Go to Step 13 |
12 | Inspect for poor connections at the harness connector of the DIM. 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 15 | Go to Step 14 |
13 | Replace the left steering wheel controls. Refer to Steering Wheel HVAC Control Assembly Replacement . Did you complete the replacement? | -- | Go to Step 15 | -- |
14 | Replace the DIM. Refer to Body Control Module (BCM) Programming/RPO Configuration and Dash Integration Module Replacement in Body Control System. Did you complete the replacement? | -- | Go to Step 15 | -- |
15 | Enable the SIR system. Refer to Enabling the SIR System in SIR. Is the SIR system enabled? | -- | Go to Step 16 | -- |
16 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
