Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views 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 HVAC 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 11 |
5 |
Caution: Refer to SIR Caution in the Preface section. Do the counts change? | -- | Go to Step 10 | Go to Step 6 |
6 | Measure the voltage from the remote radio control supply voltage circuit at the right 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 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 supply voltage circuits for an open or a short to ground 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 | 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 |
11 | Test the remote radio control head supply voltage circuit between the left and right steering wheel control switches for a short to voltage. 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 |
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 13 |
13 | Replace the left steering wheel controls. Refer to Steering Wheel Control Switch Assembly Replacement in Steering Wheel and Column. Did you complete the replacement? | -- | Go to Step 15 | -- |
14 |
Important: Perform the recalibration procedure for the DIM. Replace the DIM. Refer to Dash Integration Module Replacement in Body Control System. Did you complete the replacement? | -- | Go to Step 15 | -- |
15 | Enable the SIR system. Refer to SIR Disabling and Enabling 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 |
