Test Description
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This checks for A/C compressor clutch always OFF.
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This test is to insure cooling system is operating normally.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: HVAC Schematics Definition: The temperature cannot be adjusted, or the cooling is insufficient during A/C operation. | ||||
1 | Did you perform the HVAC Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the scan tool display any DTC B0361, B0363, B0365, B0367, B0441 or B0446? | -- | Go to Step 3 | |
|
Important: Ambient air temperature must be above 3° C (38° F).
Does the A/C compressor operate? | -- | Go to Step 4 | ||
4 | Place the blower motor switch in each speed position. Does the blower motor operate in any of the speed positions? | -- | Go to Step 5 | Go to Blower Motor Inoperative |
5 | Is the air flow sufficient from the correct outlets in each mode? | -- | Go to Step 6 | Go to Blower Motor Malfunction |
6 |
Does the recirculation door operate properly? | -- | Go to Step 6 | |
Perform the refrigerant system performance test. Refer to Air Conditioning (A/C) System Performance Test in Heating, Ventilation and Air Conditioning. Are low and high side pressures within specifications? | -- | Go to Step 8 | Go to Leak Testing in Heating, Ventilation and Air Conditioning | |
8 |
Does the scan tool indicate sensor temperature near the thermometer temperatures within the specified range? | -3 to 3°C (-5 to 5°F) | Go to Step 10 | Go to Step 9 |
9 | Inspect for a blocked, malfunctioning, or incorrectly installed inside air temperature sensor. Refer to Inside Air Temperature Sensor Replacement Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 13 |
10 |
Does the scan tool indicate that the Solar Sensor parameter is greater than the specified value? | 230 Counts | Go to Step 11 | Go to Step 15 |
11 |
Does the voltage change? | -- | Go to Step 12 | Go to Step 15 |
12 | Does the customer need to change the set temperature frequently to maintain comfort? | -- | System OK | |
13 | 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 20 | Go to Step 14 |
14 |
Does the resistance measure near the specified value? | -- | Go to Step 16 | Go to Step 17 |
15 | Inspect for poor connections at the harness connector of the 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 20 | Go to Step 18 |
16 | Inspect for poor connections at the harness connector of the HVAC control module. 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 20 | Go to Step 19 |
17 | Replace the inside air temperature sensor. Refer to Inside Air Temperature Sensor Replacement . Did you complete the replacement? | -- | Go to Step 20 | -- |
18 | Replace the sunload sensor. Refer to Sun Load Sensor Replacement . Did you complete the replacement? | -- | Go to Step 20 | -- |
19 |
Important: Perform the recalibration procedure for the HVAC control module. Replace the HVAC control module. Refer to HVAC Control Module Replacement . Did you complete the replacement? | -- | Go to Step 20 | -- |
20 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
