Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the heater-A/C control diagnostic system check? | -- | Go to Step 2 | Go to Diagnostic System Check |
2 | Inspect the RADIO-HVAC fuse. Is the RADIO-HVAC fuse open? | -- | Go to Step 3 | Go to Step 4 |
3 | Locate and repair a short to ground in circuit 640 (ORN). Refer to Testing for Short to Ground and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 29 | -- |
4 | Inspect the HVAC fuse. Is the HVAC fuse open? | -- | Go to Step 5 | Go to Step 6 |
5 | Locate and repair a short to ground in circuit 41 (BRN). Refer to Testing for Short to Ground and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 29 | -- |
6 | Inspect the HIGH BLOWER fuse. Is the HIGH BLOWER fuse open? | -- | Go to Step 7 | Go to Step 8 |
7 | Locate and repair a short to ground in circuit 40 (ORN). Refer to Testing for Short to Ground and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 29 | -- |
8 | Verify that ground G200 is clean and tight. Is ground G200 clean and tight? | -- | Go to Step 10 | Go to Step 9 |
9 | Clean and tighten G200. Is the repair complete? | -- | Go to Step 29 | -- |
10 |
Does the test lamp light? | -- | Go to Step 11 | Go to Step 12 |
11 | Replace the blower motor. Refer to Blower Motor and Fan Replacement in Heater, Ventilation, and Air Conditioning. Is the repair complete? | -- | Go to Step 29 | -- |
12 |
Is the measured voltage within the specified values? | 0.5-7.0 V | Go to Step 13 | Go to Step 18 |
13 | Use a test lamp in order to backprobe between the blower motor control module harness connector C1 terminal A and terminal B. Does the test lamp light? | -- | Go to Step 14 | Go to Step 15 |
14 | Replace the blower motor control module. Refer to Blower Motor Control Module Replacement . Is the repair complete? | -- | Go to Step 29 | -- |
15 | Use a test lamp in order to backprobe between the blower motor control module harness connector C1 terminal B and ground. Does the test lamp light? | -- | Go to Step 16 | Go to Step 17 |
16 | Locate and repair a poor connection or an open in circuit 150 (BLK) between the blower motor control module harness connector C1 terminal A and G200. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 29 | -- |
17 | Locate and repair a poor connection or an open in circuit 40 (ORN). Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 29 | -- |
18 |
Does the test lamp light? | -- | Go to Step 19 | Go to Step 21 |
19 |
Does the test lamp light? | -- | Go to Step 24 | Go to Step 20 |
20 | Locate and repair a poor connection or an open in circuit 41 (ORN). Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 29 | -- |
21 | Use a test lamp in order to backprobe between the heater-A/C control harness connector terminal C12 and ground. Does the test lamp light? | -- | Go to Step 22 | Go to Step 23 |
22 | Locate and repair a poor connection or an open in circuit 1450 (BLK). Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 29 | -- |
23 | Locate and repair a poor connection or an open in circuit 640 (ORN). Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 29 | -- |
24 |
Is there continuity in the circuit ? | -- | Go to Step 26 | Go to Step 25 |
25 | Locate and repair a poor connection or an open in circuit 754 (GRY/BLK). Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 29 | -- |
26 |
Is there a short to B+ on the circuit ? | -- | Go to Step 27 | Go to Step 28 |
27 | Locate and repair the short to B+ on circuit 754 (GRY/BLK). Refer to Testing for a Short to Voltage and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 29 | -- |
28 | Replace the heater-A/C control. Refer to Control Assembly Replacement . Is the repair complete? | -- | Go to Step 29 | -- |
29 | Verify that the system operates properly. Does the system operate properly? | -- | System OK | Go to Diagnostic System Check |
