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 |
Important:: In order to execute the HVAC Recalibration command, the scan tool disrupts keep alive memory (KAM) causing DTC B1652 (Loss of KAM) to be set as history.
Does the scan tool display DTC B1340, B1341, B1343, or B1344? | -- | 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 22 | Go to Step 4 | ||||||
4 | Visually inspect the following switches for a stuck or an intermittent sticking condition:
Did you find and correct the condition? | -- | Go to Step 22 | 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 the right air temperature switch assembly. Did you find and correct the condition? | -- | Go to Step 22 | 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? | 230 Counts | Go to Step 7 | Go to Step 17 | ||||||
7 |
Do the counts change similarly and correspond to the proper sunload sensor? | -- | Go to Step 8 | Go to Step 17 | ||||||
8 |
Does the paper stay in place? | -- | Go to Step 9 | Go to Step 16 | ||||||
9 |
Did you find and correct the condition? | -- | Go to Step 22 | 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 22 | 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 21 | ||||||
12 | Inspect for poor connections at the harness connector of the outside 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 22 | 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 19 | ||||||
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 22 | 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? | -- | System OK | Go to Step 20 | ||||||
16 | Inspect for a blocked or disconnected aspiration hose. Did you find and correct the condition? | -- | Go to Step 22 | -- | ||||||
17 | Inspect for poor connections at the harness connector of the suspect sunload 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 22 | Go to Step 18 | ||||||
18 | Replace the suspect sunload sensor. Refer to Sun Load Sensor Replacement - Left Side or Sun Load Sensor Replacement - Right Side . Did you complete the replacement? | -- | Go to Step 22 | -- | ||||||
19 | Replace the ambient air temperature sensor. Refer to Ambient Air Temperature Sensor Replacement . Did you complete the replacement? | -- | Go to Step 22 | -- | ||||||
20 | Replace the inside air temperature sensor. Refer to Inside Air Temperature Sensor Replacement . Did you complete the replacement? | -- | Go to Step 22 | -- | ||||||
21 | Replace the suspect temperature sensor. Refer to the following procedures: Did you complete the replacement? | -- | Go to Step 22 | -- | ||||||
22 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 | ||||||
