Blower Motor Inoperative at Any Speed In Manual or Auto Mode
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Inspect for HVAC Diagnostic Trouble Codes (DTCs). Refer to Scan Tool Diagnostics for more information. Are there any HVAC DTCs (present/history) present? | -- | Refer to Diagnostic System Check | |
2 | Inspect the RADIO-HVAC fuse. Is the RADIO-HVAC fuse open? | -- | ||
3 | Locate and repair a short to ground in circuit 640 (ORN). Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
4 | Inspect the HVAC fuse. Is the HVAC fuse open? | -- | ||
5 | Locate and repair a short to ground in circuit 41 (BRN). Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
6 | Inspect the HIGH BLOWER fuse. Is the HIGH BLOWER fuse open? | -- | ||
7 | Locate and repair a short to ground in circuit 40 (ORN). Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
8 | Inspect if ground G 200 is clean and tight. Is ground G 200 clean and tight? | -- | ||
9 | Clean and tighten G 200. Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
10 |
Does the test lamp light? | -- | ||
11 | Replace the blower motor. Refer to Blower Motor and Fan Replacement . Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
12 |
Does the voltage vary between the specified values? | 0.5-7V | ||
13 | Use a test light to backprobe between the blower motor control module harness connector C 1 terminal A and terminal B. Does the test lamp light? | -- | ||
14 | Replace the blower motor control module. Refer to Blower Motor Control Module Replacement . Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
15 | Use a test lamp to backprobe between the blower motor control module harness connector C 1 terminal B and ground. Does the test lamp light? | -- | ||
16 | Locate and repair a poor connection or an open in circuit 150 (BLK) between the blower motor control module harness connector C 1 terminal A and G 200. Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
17 | Locate and repair a poor connection or an open in circuit 40 (ORN). Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
18 |
Does the test lamp light? | -- | ||
19 |
Is the test light on? | -- | ||
20 | Locate and repair a poor connection or an open in circuit 41 (ORN). Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
21 | Use a test lamp tp backprobe between the heater A/C control harness connector terminal C 12 and ground. Does the test lamp light? | -- | ||
22 | Locate and repair a poor connection or an open in circuit 1450 (BLK). Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
23 | Locate and repair a poor connection or an open in circuit 640 (ORN). Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
24 |
Is there continuity in the circuit ? | -- | ||
25 | Locate and repair a poor connection or an open in circuit 754 (GRY/BLK). Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
26 |
Is there a short to B+ on the circuit ? | -- | ||
27 | Locate and repair the short to B+ on circuit 754 (GRY/BLK). Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
28 | Replace the heater A/C control. Refer to Control Assembly Replacement . Is the repair complete? | -- | Refer to Diagnostic System Check | -- |
Blower Motor Inoperative at Any Speed In Auto Mode Only
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Replace the heater-A/C control. Refer to Control Assembly Replacement . Is the repair complete? | -- | System OK | -- |
