Auxiliary Blower Motor Inoperative Body Type VIN 6
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views DEFINITION: The auxiliary blower motor is inoperative in all speed positions from both the front and rear controls. | ||||
1 | Did you perform the HVAC Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the auxiliary blower motor operate in any of the speed positions? | Go to Step 3 | ||
3 |
Does the auxiliary blower motor operate in any of the speed positions? | -- | Go to Blower Motor Malfunction | Go to Step 4 |
4 |
Does the test lamp illuminate? | -- | Go to Step 11 | Go to Step 5 |
5 | Test the battery positive voltage circuit of the auxiliary blower motor control processor for an open, high resistance or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 17 | Go to Step 6 |
6 | Test the ground circuit of the auxiliary blower motor control processor for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 17 | Go to Step 7 |
7 |
Important: Ensure that the auxiliary blower motor control processor connector and the auxiliary HVAC control module connectors are connected during this step in order to avoid misdiagnosis.
Does the frequency measure near the specified value? | 35 Hz | Go to Step 12 | Go to Step 8 |
8 |
Does the voltage measure near the specified value? | 8-12.5 V | Go to Step 10 | Go to Step 9 |
9 | Test the auxiliary blower motor speed control circuit of the auxiliary HVAC control module 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 17 | Go to Step 12 |
10 | Test the auxiliary blower motor speed control circuit of the auxiliary HVAC control module for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 17 | Go to Step 13 |
11 | Inspect for poor connections at the harness connector of the auxikiary blower motor. 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 17 | Go to Step 14 |
12 | Inspect for poor connections at the harness connector of the auxiliary blower motor control 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 17 | Go to Step 15 |
13 | 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 17 | Go to Step 16 |
14 | Replace the auxiliary blower motor. Refer to Auxiliary Blower Motor Replacement in Heating, Ventilation and Air Conditioning. Did you complete the replacement? | -- | Go to Step 17 | -- |
15 | Replace the auxiliary blower motor control processor. Refer to Auxiliary Blower Motor Processor Replacement . Did you complete the replacement? | -- | Go to Step 17 | -- |
16 |
Important: Perform the recalibration procedure for the auxiliary HVAC control module. Replace the auxiliary HVAC control module. Refer to Auxiliary Heater and Air Conditioning Control Module Replacement . Did you complete the replacement? | -- | Go to Step 17 | -- |
17 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
