Too Hot in Vehicle - Auxiliary with Sunroof
Test Description
The numbers below refer to thew step numbers on the diagnostic table.
Step | Action | Values | Yes | No | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: HVAC Schematics DEFINITION: Auxiliary air temperature cannot be adjusted from one or both auxiliary controls or auxiliary cooling is insufficient. | ||||||||||||||
1 | Did you review the HVAC operation and perform the necessary inspections? | -- | Go to Step 2 | |||||||||||
2 |
Important:: The auxiliary HVAC control assembly cannot request A/C compressor operation. An A/C request must be generated by the HVAC control module to provide cooled airflow through the auxiliary system. Does the HVAC control module operate and provide sufficient cooling? | -- | Go to Step 3 | Go to Too Hot in Vehicle | ||||||||||
3 |
Does the auxiliary blower motor operate at all? | -- | Go to Step 4 | |||||||||||
4 | Does the auxiliary blower motor operate correctly for each speed position? | -- | 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 7 | ||||||||||
Perform the refrigerant system performance test. Refer to Air Conditioning (A/C) System Performance Test . Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 7 | |||||||||||
7 |
Does the auxiliary air temperature actuator drive shaft rotate at all? | -- | Go to Step 8 | Go to Step 9 | ||||||||||
8 | Inspect the auxiliary air temperature door and the auxiliary air temperature actuator for the following conditions:
Did you find and correct the condition? | -- | Go to Step 18 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | ||||||||||
9 | Test the ignition 3 voltage circuit of the auxiliary 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 18 | Go to Step 10 | ||||||||||
10 | Test the ground circuit of the auxiliary 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 18 | Go to Step 11 | ||||||||||
11 | Test the temperature door control circuit of the auxiliary air temperature actuator for an open, a 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 18 | Go to Step 12 | ||||||||||
12 |
Important:: The auxiliary HVAC control assembly connector must be connected to correctly perform test.
Does the voltage change and measure within the specified range? | 0-12 V | Go to Step 13 | Go to Step 15 | ||||||||||
13 | Inspect for poor connections at the harness connector of the auxiliary 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 18 | Go to Step 14 | ||||||||||
14 | Inspect the auxiliary 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 18 | Go to Step 16 | ||||||||||
15 | Inspect for poor connections at the harness connector of the auxiliary 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 18 | Go to Step 17 | ||||||||||
16 |
Important:: No recalibration is required of the auxiliary air temperature actuator. Replace the auxiliary air temperature actuator. Refer to Auxiliary Temperature Valve Actuator Replacement . Did you complete the replacement? | -- | Go to Step 18 | -- | ||||||||||
17 |
Important:: No recalibration is required of the front auxiliary HVAC control assembly. Replace the front auxiliary HVAC control assembly. Refer to Auxiliary Heater and Air Conditioning Control Replacement - Front . Did you complete the replacement? | -- | Go to Step 18 | -- | ||||||||||
18 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 | ||||||||||
Too Hot in Vehicle - Auxiliary w/o Sunroof
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Values | Yes | No | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: HVAC Schematics DEFINITION: Auxiliary air temperature can not be adjusted from one or both auxiliary controls or auxiliary cooling is insufficient. | ||||||||||||||
1 | Did you review the HVAC operation and perform the necessary inspections? | -- | Go to Step 2 | |||||||||||
2 |
Important:: The auxiliary HVAC control assembly cannot request A/C compressor operation. An A/C request must be generated by the HVAC control module to provide cooled airflow through the auxiliary system. Does the HVAC control module operate and provide sufficient cooling? | -- | Go to Step 3 | Go to Too Hot in Vehicle | ||||||||||
3 |
Does the auxiliary blower motor operate at all? | -- | Go to Step 4 | |||||||||||
4 | Does the auxiliary blower motor operate correctly for each speed position? | -- | 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 7 | ||||||||||
Perform the refrigerant system performance test. Refer to Air Conditioning (A/C) System Performance Test . Did you find and correct the condition? | -- | Go to Step 30 | Go to Step 7 | |||||||||||
7 |
Does the auxiliary air temperature actuator drive shaft rotate at all? | -- | Go to Step 8 | Go to Step 10 | ||||||||||
8 |
Does the auxiliary air temperature actuator drive shaft rotate at all? | -- | Go to Step 9 | Go to Step 13 | ||||||||||
9 | Inspect the auxiliary air temperature door and the auxiliary air temperature actuator for the following conditions:
Did you find and correct the condition? | -- | Go to Step 30 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | ||||||||||
10 |
Does the auxiliary air temperature actuator drive shaft rotate at all? | -- | Go to Step 11 | Go to Step 16 | ||||||||||
11 | Test the rear auxiliary temperature door control circuit of the rear auxiliary HVAC control assembly for an open, high resistance, a 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 30 | Go to Step 12 | ||||||||||
12 |
Important:: The rear auxiliary HVAC control assembly connector must be connected to correctly perform test.
Does the voltage change and measure within the specified range? | 0-12 V | Go to Step 25 | Go to Step 23 | ||||||||||
13 | Test the ignition 3 voltage circuit of the front auxiliary HVAC control assembly 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 30 | Go to Step 14 | ||||||||||
14 | Test the air temperature door position signal circuit of the front auxiliary HVAC control assembly for an open, high resistance, a 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 30 | Go to Step 15 | ||||||||||
15 |
Important:: The front auxiliary HVAC control assembly connector must be connected to correctly perform test.
Does the voltage change and measure within the specified range? | 0-12 V | Go to Step 25 | Go to Step 24 | ||||||||||
16 | Test the ignition 3 voltage circuit of the auxiliary HVAC processor 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 30 | Go to Step 17 | ||||||||||
17 | Test the ignition 3 voltage circuit of the auxiliary 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 30 | Go to Step 18 | ||||||||||
18 | Test the ground circuit of the auxiliary 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 30 | Go to Step 19 | ||||||||||
19 | Test the auxiliary temperature door control circuit of the auxiliary air temperature actuator for an open, high resistance, a 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 30 | Go to Step 20 | ||||||||||
20 |
Important:: The auxiliary HVAC processor, front and rear auxiliary HVAC control assembly connectors must be connected to correctly perform test.
Does the voltage change and measure within the specified range? | 0-12 V | Go to Step 21 | Go to Step 25 | ||||||||||
21 | Inspect for poor connections at the harness connector of the auxiliary 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 30 | Go to Step 22 | ||||||||||
22 | Inspect the auxiliary 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 30 | Go to Step 26 | ||||||||||
23 | Inspect for poor connections at the harness connector of the rear auxiliary 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 30 | Go to Step 27 | ||||||||||
24 | Inspect for poor connections at the harness connector of the front auxiliary 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 30 | Go to Step 28 | ||||||||||
25 | Inspect for poor connections at the harness connector of the auxiliary HVAC processor. 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 30 | Go to Step 29 | ||||||||||
26 |
Important:: The recalibration of the auxiliary air temperature actuator is not required. Replace the auxiliary air temperature actuator. Refer to Air Temperature Actuator Replacement . Did you complete the replacement? | -- | Go to Step 30 | -- | ||||||||||
27 |
Important:: The recalibration of the rear auxiliary HVAC control assembly is not required. Replace the rear auxiliary HVAC control assembly. Refer to Auxiliary Heater and Air Conditioning Control Replacement - Rear . Did you complete the replacement? | -- | Go to Step 30 | -- | ||||||||||
28 |
Important:: The recalibration of the front auxiliary HVAC control assembly is not required. Replace the front auxiliary HVAC control assembly. Refer to Heater and Air Conditioning Control Replacement . Did you complete the replacement? | -- | Go to Step 30 | -- | ||||||||||
29 |
Important:: The recalibration of the auxiliary HVAC processor is not required. Replace the auxiliary HVAC processor. Refer to Auxiliary HVAC Control Processor Replacement . Did you complete the replacement? | -- | Go to Step 30 | -- | ||||||||||
30 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 | ||||||||||
