Blower Motor Is Inoperative At Low Speed (Position 1)<<C60>>
Step
| Action
| Value(s)
| Yes
| No
|
DEFINITION: Blower motor will operate at all
speeds except Low speed (Position 1).
|
1
| Were you sent here from the HVAC Blower Control System
Check (C60)?
| --
|
Go to Step 2
| Go to HVAC Blower Control System Check (C60)
|
2
|
- Disconnect the HVAC control head connector C2.
- Disconnect the blower motor control module connector C1.
- Connect a fused jumper wire between terminal B and terminal H
of the HVAC control head connector C2.
- Turn the ignition switch to the ON position.
- Connect a DMM between terminal B of the blower motor control module
connector C1 and a known good ground.
- Measure the available voltage at terminal B of the blower motor
control module connector C1.
Is the voltage within the specified range?
| 10.0 -14.0V
|
Go to Step
4
|
Go to Step 3
|
3
| Locate and repair an open or
a high resistance in CKT 60.
Is the repair complete?
| --
| Go
to HVAC Blower Control System Check (C60)
| --
|
4
|
- Remove the fused jumper wire.
- Connect the HVAC control head connector C2.
- Turn the blower switch to the Low position.
- Turn the ignition switch to the ON position.
- Connect the DMM between terminal B of the blower motor control
module connector C1 and ground.
- Measure the available voltage at terminal B of the blower motor
control module connector C1.
Is the voltage within the specified range?
| 10.0 -14.0V
|
Go to Step
6
|
Go to Step 5
|
5
| Replace the HVAC control head.
Is the repair complete?
| --
| Go
to HVAC Blower Control System Check (C60)
| --
|
6
| Replace the blower motor control module.
Is the repair complete?
| --
| Go
to HVAC Blower Control System Check (C60)
| --
|
