Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 |
Does the voltage equal the specified value? | 12 V | Go to Step 2 | Go to Step 4 |
2 | Measure the voltage between blower control module output connector terminal A and terminal B. Does the voltage equal the specified value? | 12 V | Go to Step 3 | Go to Step 5 |
3 |
Is the repair complete? | -- | System OK | -- |
4 | Measure the voltage between blower control module input connector terminal B and ground. Does the voltage equal the specified value? | 12 V | Go to Step 10 | Go to Step 8 |
5 | Measure the voltage between blower control module input connector terminal C and ground. Does the voltage equal the specified value? | 5 V | Go to Step 6 | Go to Step 12 |
6 | Measure the voltage at the HVAC programmer connector for the HVAC blower control output. Does the voltage equal the specified value? | 5 V | Go to Step 7 | Go to Step 11 |
7 | Replace the instrument panel integration module. Refer to Instrument Panel Module Replacement in Body Control Systems. Is the repair complete? | -- | System OK | -- |
8 | Inspect positive battery feed to blower control module for open or a blown fuse for cell 10, blower motor fuse. Is the repair complete? | -- | System OK If fuse blows after replacement Go to Step 10 | Go to Step 9 |
9 | Check ground supply to blower control module for open. Is the repair complete? | -- | System OK | -- |
10 | Replace the blower control module. Refer to Blower Motor Control Module Replacement in Heating, Ventilation and Air Conditioning. Is the repair complete? | -- | System OK | -- |
11 | Inspect the blower speed input circuit from the HVAC control assembly for open. Is the repair complete? | -- | System OK | -- |
12 |
Is a short present? | -- | Go to Step 13 | Go to Step 10 |
13 | Inspect the blower speed output circuit from the HVAC control assembly to the blower control module for short to ground. Is the repair complete? | -- | System OK | Go to Step 7 |
