Schematic Reference: HVAC Schematics

1

Measure the voltage at terminal 4 of the intake motor.

Is the voltage measured within the specified range?

11-14 V

Go to Step 3

Go to Step 2

1. Inspect the connector and circuit (Brown) for any wiring or terminal problems.
2. Repair any problems found.

Did you find and correct the condition?

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System OK

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1. Using the Intake Motor Table, measure the voltages between terminal 4 and terminal 5 of the motor connector. Refer to Intake Control Table .
2. Change the intake setting and observe the voltage changes.

Are the voltages measured as specified in the Intake Motor table?

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Go to Step 4

Go to Step 5

Replace the intake motor.

Did you complete the replacement?

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System OK

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1. Using the Intake Motor Table, measure the voltages between terminal 4 and terminal 7 of the motor connector. Refer to Intake Control Table .
2. Change the intake setting and observe the voltage changes.

Are the voltages measured as specified in the Intake Motor table?

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Go to Step 6

Go to Step 7

1. Inspect the wiring harness and connectors between the controller and the motor that is not performing properly.
2. Repair or replace the wiring harness or the defective terminal.

Did you find and correct the condition?

--

System OK

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Inspect the connector at the controller.

Is there a defective terminal?

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Go to Step 8

Go to Step 9

Repair or replace the terminal.

Did you find and correct the condition?

--

System OK

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Replace the controller.

Did you complete the replacement?

--

System OK

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