Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views DEFINITION: The blower motor is ON while the HVAC controls is in the OFF position. | ||||
1 | Did you perform the HVAC Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the blower motor operate? | -- | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
3 | With the scan tool observe the Blower Motor PWM Speed parameter in the Heating and Air Conditioning data list. Does the scan tool indicate that the Blower Motor PWM Speed parameter is near the specified value? | 0% | Go to Step 4 | Go to Step 6 |
4 | Disconnect the HVAC control module. Does the blower motor continue to operate? | -- | Go to Step 5 | Go to Step 6 |
5 |
Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 7 |
6 | Inspect for poor connections at the harness connector of the HVAC control module. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 9 | Go to Step 8 |
7 | Replace the blower motor control processor. Refer to Blower Motor Control Processor Replacement . Did you complete the replacement? | -- | Go to Step 9 | -- |
8 | Replace the HVAC control module. Refer to HVAC Control Module Replacement in Body Control System. Did you complete the replacement? | -- | Go to Step 9 | -- |
9 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
