Test Description
The numbers below refer to the step numbers on the diagnostic table.
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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 Schematics Connector End View Reference: HVAC Connector End Views 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 | Does the blower motor operate in the desired speeds? | -- | 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 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 |
Do the counts change when actuators are commanded? | -- | Go to Step 9 | Go to Step 16 |
9 |
Does the scan tool indicate that the inside air temperature sensor is near the specified value for the recorded air temperature? | -5 to +5°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 Sun Load Sensor parameter is more 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 circuit 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 suspect actuator ignition 3 voltage circuit 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 | Replace the suspect air temperature actuator. Refer to Air Temperature Actuator Replacement - Right Side or Air Temperature Actuator Replacement - Left Side . Did you complete the replacement? | -- | Go to Step 25 | -- |
24 | Replace the HVAC control module. Refer to HVAC Control Module 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 |
