Test Description
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This checks for A/C compressor clutch always OFF.
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This test is to ensure A/C system is operating normally.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: HVAC Air Delivery/Temperature Control 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 | Go to Diagnostic System Check |
2 |
Does the scan tool display any DTC B0361, B0363, B0365, B0367, B0441 or B0446? | -- | Go to DTC Table | Go to Step 3 |
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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 | Does the blower motor operate in the desired speed(s)? | -- | Go to Step 6 | Go to Blower Motor Malfunction |
6 |
Does the recirculation door move from the recirculation position to the outside air position? | -- | Go to Step 7 | |
Perform the refrigerant system performance test. Refer to 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 |
Do the counts change when actuators are commanded? | -- | Go to Step 9 | Go to Step 16 |
9 |
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 11 | Go to Step 10 |
10 | 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 25 | Go to Step 14 |
11 |
Does the scan tool indicate that the Solar Sensor parameter is greater than the specified value? | 230 Counts | Go to Step 12 | Go to Step 19 |
12 |
Does the voltage change? | -- | Go to Step 13 | Go to Step 19 |
13 | Does the customer need to change the set temperature frequently to maintain comfort? | -- | System OK | |
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 25 | Go to Step 15 |
15 |
Does the resistance measure near the specified value? | -- | Go to Step 20 | Go to Step 21 |
16 | Test the suspect actuator door control circuits, circuit 1199 of the left air temperature actuator and circuit 1236 of the right air temperature actuator for a short to voltage, short to ground, open or high resistance. Refer to Circuit Testing and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 25 | Go to Step 17 |
17 | Test the circuit 41 of the suspect air temperature actuator for a short to ground, open or high resistance. Refer to Circuit Testing and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 25 | Go to Step 18 |
18 | Inspect for poor connections at the harness connector of the suspect air temperature actuator. 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 25 | Go to Step 23 |
19 | 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 25 | Go to Step 22 |
20 | 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 25 | Go to Step 24 |
21 | Replace the inside air temperature sensor. Refer to Inside Air Temperature Sensor Replacement . Did you complete the replacement? | -- | Go to Step 25 | -- |
22 | Replace the sunload sensor. Refer to Sun Load Sensor Replacement . Did you complete the replacement? | -- | Go to Step 25 | -- |
23 |
Important: Perform the recalibration procedure for the air temperature actuator. Replace the suspect air temperature actuator. Refer to Temperature Actuator Replacement . Did you complete the replacement? | -- | Go to Step 25 | -- |
24 |
Important:: Perform the recalibration procedure for the HVAC control module. Replace the HVAC control module. Refer to Control Assembly Replacement . Did you complete the replacement? | -- | Go to Step 25 | -- |
25 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
