Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views DEFINITION: Improper control response, set temperature requires frequent adjustment or changes by itself. | ||||||||||
1 | Did you perform the HVAC Diagnostic System Check? | -- | Go to Step 2 | |||||||
2 |
Does the scan tool display any DTCs? | -- | Go to Step 3 | |||||||
3 | Inspect for a poor battery condition. Refer to Battery Inspection/Test in Engine Electrical. Did you find and correct the condition? | -- | Go to Step 24 | Go to Step 4 | ||||||
4 | Visually inspect the following:
Did you find and correct the condition? | -- | Go to Step 24 | Go to Step 5 | ||||||
5 | Verify that the customer is using the correct key to enable personalization and is not inadvertently activating the steering wheel controls or right air temperature switch assembly. Did you find and correct the condition? | -- | Go to Step 24 | Go to Step 6 | ||||||
6 |
Does the scan tool indicate that the Right and Left Solar Sensor data parameters are more than the specified value? | 224 Counts | Go to Step 7 | Go to Step 19 | ||||||
7 |
Do the counts change similarly and correspond to the proper side of the sunload sensor assembly? | -- | Go to Step 8 | Go to Step 19 | ||||||
8 |
Does the paper stay in place? | -- | Go to Step 9 | Go to Step 18 | ||||||
9 |
Did you find and correct the condition? | -- | Go to Step 24 | Go to Step 10 | ||||||
10 | Inspect for poor connections at the upper right, upper left, lower right, and lower left air temperature sensor harness connectors. 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 24 | Go to Step 11 | ||||||
11 | Test the upper right, upper left, lower right, and lower left air temperature sensor resistances. Refer to Sensor Resistance Table . Do the resistances measure near the Sensor Resistance Table values? | -- | Go to Step 12 | Go to Step 23 | ||||||
12 | Inspect for poor connections at the harness connector of the ambient air temperature sensor. 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 24 | Go to Step 13 | ||||||
13 | Test the ambient air temperature sensor resistance. Refer to Sensor Resistance Table . Does the resistance measure near the Sensor Resistance Table value? | -- | Go to Step 14 | Go to Step 21 | ||||||
14 | Inspect for poor connections at the harness connector of the inside air temperature sensor. 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 24 | Go to Step 15 | ||||||
15 | Test the inside air temperature sensor resistance. Refer to Sensor Resistance Table . Does the resistance measure near the Sensor Resistance Table value? | -- | Go to Step 16 | Go to Step 22 | ||||||
16 |
Does the actuator shaft continuously rotate? | -- | Go to Step 17 | System OK | ||||||
17 | Test the 5 volt reference circuit of the right air temperature actuator for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 24 | -- | ||||||
18 | Inspect for a blocked or disconnected aspiration hose. Did you find and correct the condition? | -- | Go to Step 24 | -- | ||||||
19 | Inspect for poor connections at the harness connector of the sunload sensor assembly. 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 24 | Go to Step 20 | ||||||
20 | Replace the sunload sensor assembly. Refer to Sun Load Sensor Replacement . Did you complete the replacement? | -- | Go to Step 24 | -- | ||||||
21 | Replace the ambient air temperature sensor. Refer to Ambient Air Temperature Sensor Replacement . Did you complete the replacement? | -- | Go to Step 24 | -- | ||||||
22 | Replace the inside air temperature sensor. Refer to Inside Air Temperature Sensor Replacement . Did you complete the replacement? | -- | Go to Step 24 | -- | ||||||
23 | Replace the suspect temperature sensor. Refer to the following procedures: Did you complete the replacement? | -- | Go to Step 24 | -- | ||||||
24 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 | ||||||
