Step | Action | Value(s) | Yes | No | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views DEFINITION: Air does not flow correctly from the auxiliary air distribution outlets. | ||||||||||
1 | Did you review the HVAC operation and perform the necessary inspections? | -- | Go to Step 2 | |||||||
2 |
Is the auxiliary blower motor OFF? | -- | Go to Step 3 | |||||||
3 |
Is the auxiliary blower motor OFF? | -- | Go to Step 4 | |||||||
4 |
Does the auxiliary blower motor operate in any speed position? | -- | Go to Step 5 | |||||||
5 | Does the auxiliary blower motor operate in each speed position? | -- | Go to Step 6 | |||||||
6 |
Does the auxiliary blower motor operate properly in each speed position? | -- | Go to Step 7 | |||||||
7 |
Does the air flow from the proper air distribution outlets? | -- | Go to Step 8 | Go to Step 9 | ||||||
8 |
Important: The park lamps must remain ON, with the instrument panel dimmer switch in the brightest position during this step.
Does the air flow from the proper air distribution outlets? | -- | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 19 | ||||||
9 |
Does the air flow from the proper air distribution outlets? | -- | Go to Step 16 | Go to Step 10 | ||||||
10 |
Does the test lamp illuminate? | -- | Go to Step 11 | Go to Step 28 | ||||||
11 | Test the ground circuit of the auxiliary mode actuator for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 12 | ||||||
12 |
Does the measured voltage continuously increase between the minimum specified value and the maximum specified value? | 0 V VENT B+ FLOOR | Go to Step 23 | Go to Step 13 | ||||||
13 | Test the auxiliary mode door control circuit between the auxiliary mode actuator and the auxiliary HVAC control processor for an open, high resistance, short to ground, or short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 14 | ||||||
14 | Test the ignition 3 voltage circuit of the auxiliary HVAC control processor for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 15 | ||||||
15 | Test the ground circuit of the auxiliary HVAC control processor for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 27 | ||||||
16 |
Does the measured voltage continuously increase between the minimum specified value and the maximum specified value? | 0 V VENT B+ FLOOR | Go to Step 27 | Go to Step 17 | ||||||
17 | Test the auxiliary mode door control circuit between the front auxiliary HVAC control assembly and the auxiliary HVAC control processor for an open, high resistance, short to ground, or short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 18 | ||||||
18 | Test the ignition 3 voltage circuit of the front auxiliary HVAC control assembly for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 25 | ||||||
19 |
Important: The park lamps must remain ON, with the instrument panel dimmer switch in the brightest position during this step.
Does the measured voltage continuously increase between the minimum specified value and the maximum specified value? | 0 V VENT B+ FLOOR | Go to Step 27 | Go to Step 20 | ||||||
20 | Test the auxiliary mode door control circuit between the rear auxiliary HVAC control assembly and the auxiliary HVAC control processor for an open, high resistance, short to ground, or short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 21 | ||||||
21 | Test the ignition 3 voltage circuit of the rear auxiliary HVAC control assembly for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 22 | ||||||
22 | Test the ground circuit of the rear auxiliary HVAC control assembly for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 26 | ||||||
23 | Inspect the auxiliary mode door and auxiliary mode actuator for the following:
Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 24 | ||||||
24 | Inspect for poor connections at the harness connector of the auxiliary mode actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 29 | ||||||
25 | 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 . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 30 | ||||||
26 | 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 . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 31 | ||||||
27 | Inspect for poor connections at the harness connector of the auxiliary HVAC control processor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 32 | ||||||
28 | Repair the ignition 3 voltage circuit for an open or a high resistance. Refer to Wiring Repairs . Did you complete the repair? | -- | Go to Step 33 | -- | ||||||
29 | Replace the auxiliary mode actuator. Refer to Auxiliary Mode Valve Actuator Replacement . Did you complete the repair? | -- | Go to Step 33 | -- | ||||||
30 | Replace the front auxiliary HVAC control assembly. Refer to Auxiliary Heater and Air Conditioning Control Replacement - Front . Did you complete the repair? | -- | Go to Step 33 | -- | ||||||
31 | Replace the rear auxiliary HVAC control assembly. Refer to Auxiliary Heater and Air Conditioning Control Replacement - Rear . Did you complete the repair? | -- | Go to Step 33 | -- | ||||||
32 | Replace the auxiliary HVAC control processor. Refer to Auxiliary HVAC Control Processor Replacement . Did you complete the repair? | -- | Go to Step 33 | -- | ||||||
33 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
Step | Action | Value(s) | Yes | No | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views DEFINITION: Air does not flow correctly from the auxiliary air distribution outlets. | ||||||||||
1 | Did you review the HVAC operation and perform the necessary inspections? | -- | Go to Step 2 | |||||||
2 |
Is the auxiliary blower motor OFF? | -- | Go to Step 3 | |||||||
3 |
Does the auxiliary blower motor operate in any speed position? | -- | Go to Step 4 | |||||||
4 | Does the auxiliary blower motor operate in each speed position? | -- | Go to Step 5 | |||||||
5 |
Does the air flow from the proper air distribution outlets? | -- | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 6 | ||||||
6 |
Does the test lamp illuminate? | -- | Go to Step 7 | Go to Step 15 | ||||||
7 | Test the ground circuit of the auxiliary mode actuator for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 8 | ||||||
8 |
Does the measured voltage continuously increase between the minimum specified value and the maximum specified value? | 0 V VENT B+ FLOOR | Go to Step 12 | Go to Step 9 | ||||||
9 | Test the auxiliary mode door control circuit of the auxiliary mode actuator for an open, high resistance, short to ground, or short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 10 | ||||||
10 | Test the ignition 3 voltage circuit of the front auxiliary HVAC control assembly for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 11 | ||||||
11 | Test the ground circuit of the front auxiliary HVAC control assembly for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 14 | ||||||
12 | Inspect the auxiliary mode door and auxiliary mode actuator for the following:
Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 13 | ||||||
13 | Inspect for poor connections at the harness connector of the auxiliary mode actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 16 | ||||||
14 | 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 . Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 17 | ||||||
15 | Repair the ignition 3 voltage circuit. Refer to Wiring Repairs . Did you complete the repair? | -- | Go to Step 18 | -- | ||||||
16 | Replace the auxiliary mode actuator. Refer to Auxiliary Mode Valve Actuator Replacement . Did you complete the repair? | -- | Go to Step 18 | -- | ||||||
17 | Replace the front auxiliary HVAC control assembly. Refer to Auxiliary Heater and Air Conditioning Control Replacement - Front . Did you complete the repair? | -- | Go to Step 18 | -- | ||||||
18 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |