Too Hot in Vehicle Oldsmobile
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
The specified values are from the A/C System Performance Test.
-
The voltage will vary between 0-12 volts during normal operation. The HVAC control module connector must be connected during this step.
Step | Action | Values | 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 blower motor operate at all? | -- | Go to Step 3 | Go to Blower Motor Inoperative | ||||||||||||
3 | Does the blower motor operate correctly, provide sufficient airflow, for each speed position? | -- | Go to Step 4 | Go to Blower Motor Malfunction | ||||||||||||
4 |
Does the Recirculation Door operate properly? | -- | Go to Step 5 | |||||||||||||
5 | Does the Too Hot in Vehicle concern occur when A/C cooling is desired? | -- | Go to Step 6 | Go to Step 8 | ||||||||||||
6 |
Important: For A/C compressor operation, ambient air temperature must be above 3°C (38°F).
Does the A/C compressor operate? | -- | 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. Did you find and correct the condition? | -- | Go to Step 21 | Go to Step 8 | |||||||||||||
8 |
Does the air temperature actuator drive shaft rotate at all? | -- | Go to Step 9 | Go to Step 10 | ||||||||||||
9 | Inspect the air temperature door and the air temperature actuator for the following conditions:
Did you find and correct the condition? | -- | Go to Step 21 | Go to Step 10 | ||||||||||||
10 | Test the ignition 3 voltage circuit of the air temperature actuator for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 21 | Go to Step 11 | ||||||||||||
11 | Test the ground circuit of the 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 21 | Go to Step 12 | ||||||||||||
12 | Test the air temperature door control signal circuit of the air temperature actuator for an open, high resistance, short to ground, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 21 | Go to Step 13 | ||||||||||||
13 | Test the ignition 3 voltage circuit of the HVAC control assembly for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 21 | Go to Step 14 | ||||||||||||
14 | Test the ground circuit of the HVAC control assembly for an open or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 21 | Go to Step 15 | ||||||||||||
|
Important: Ensure that the HVAC control assembly connector is connected during this step in order to avoid misdiagnosis.
Does the voltage measure within the specified values with a smooth transition between cold and hot? | 12 V at cold 0 V at hot | Go to Step 16 | Go to Step 18 | |||||||||||||
16 | Inspect for poor connections at the harness connector of the 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 21 | Go to Step 17 | ||||||||||||
17 | Inspect the air temperature actuator, door and any attaching linkage for binding or a condition that prevents drive shaft rotation. Did you find and correct the condition? | -- | Go to Step 21 | Go to Step 19 | ||||||||||||
18 | Inspect for poor connections at the harness connector of the HVAC control 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 21 | Go to Step 20 | ||||||||||||
19 | Replace the air temperature actuator. Refer to Temperature Valve Actuator Replacement . Did you complete the replacement? | -- | Go to Step 21 | -- | ||||||||||||
20 | Replace the HVAC control assembly. Refer to Heater and Air Conditioning Control Replacement . Did you complete the replacement? | -- | Go to Step 21 | -- | ||||||||||||
21 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 | ||||||||||||
Too Hot in Vehicle Pontiac
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
The specified values are from the A/C System Performance Test.
-
The voltage will vary between 0-12 volts during normal operation. The HVAC control module connector must be connected during this step.
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 blower motor operate at all? | -- | Go to Step 3 | Go to Blower Motor Inoperative | ||||||||||||
3 | Does the blower motor operate correctly, provide sufficient airflow, for each speed position? | -- | Go to Step 4 | Go to Blower Motor Malfunction | ||||||||||||
4 | Does the Too Hot in Vehicle concern occur when A/C cooling is desired? | -- | Go to Step 5 | Go to Step 7 | ||||||||||||
5 |
Important: For A/C compressor operation, ambient air temperature must be above 3°C (38°F).
Does the A/C compressor operate? | -- | 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. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 7 | |||||||||||||
7 |
Does the air temperature actuator drive shaft rotate at all? | -- | Go to Step 8 | Go to Step 9 | ||||||||||||
8 | Inspect the air temperature door and the air temperature actuator for the following conditions:
Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 9 | ||||||||||||
9 | Test the ignition 3 voltage circuit of the air temperature actuator for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 10 | ||||||||||||
10 | Test the ground circuit of the air temperature actuator for an open. Refer Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 11 | ||||||||||||
11 | Test the air temperature door control signal circuit of the air temperature actuator for an open, high resistance, short to ground, or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 12 | ||||||||||||
12 | Test the ignition 3 voltage circuit of the HVAC control assembly for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 13 | ||||||||||||
13 | Test the ground circuit of the HVAC control assembly for an open or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 14 | ||||||||||||
|
Important: Ensure that the HVAC control assembly connector is connected during this step in order to avoid misdiagnosis.
Does the voltage measure within the specified values with a smooth transition between cold and hot? | 12 V at cold 0 V at hot | Go to Step 16 | Go to Step 15 | |||||||||||||
15 | Inspect for poor connections at the harness connector of the 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 20 | Go to Step 16 | ||||||||||||
16 | Inspect the air temperature actuator, door and any attaching linkage for binding or a condition that prevents drive shaft rotation. Did you find and correct the condition? | -- | Go to Step 20 | Go to Step 18 | ||||||||||||
17 | Inspect for poor connections at the harness connector of the HVAC control 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 20 | Go to Step 19 | ||||||||||||
18 | Replace the air temperature actuator. Refer to Air Temperature Actuator Replacement . Did you complete the replacement? | -- | Go to Step 20 | -- | ||||||||||||
19 | Replace the HVAC control assembly. Refer to Heater and Air Conditioning Control 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 2 | ||||||||||||
