Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you review the HVAC operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms |
2 | Inspect the HTR-A/C Fuse 12 at the IP Fuse Block. Is the fuse operational? | -- | Go to Step 4 | Go to Step 3 |
3 |
Did you complete the repair? | -- | Go to Step 23 | -- |
4 | Inspect the FRONT HVAC Fuse at the Underhood Fuse Block. Is the fuse operational? | -- | Go to Step 6 | Go to Step 5 |
5 |
Did you complete the repair? | -- | Go to Step 23 | -- |
6 |
Does the blower motor operate? | -- | Go to Testing for Electrical Intermittents in Wiring Systems. | Go to Step 7 |
7 |
Does the test lamp illuminate? | -- | Go to Step 8 | Go to Step 9 |
8 | Replace the front blower motor. Refer to Blower Motor and Fan Replacement in Heating, Ventilation, and Air Conditioning. Did you complete the replacement? | -- | Go to Step 23 | -- |
9 | Connect a test lamp between the front blower motor connector CKT 65 (PPL) cavity A to ground. Does the test lamp illuminate? | -- | Go to Step 10 | Go to Step 11 |
10 |
Does the DMM show continuity? | -- | Go to Step 13 | Go to Step 12 |
11 |
Does the test lamp illuminate? | -- | Go to Step 15 | Go to Step 14 |
12 | Inspect CKT 350 (BLK) for an open between the front blower motor and blower motor resistor and relay. Refer to Circuit Testing in Wiring Systems. Does an open exist? | -- | Go to Step 16 | Go to Step 17 |
13 | Repair the open in CKT 350 (BLK) between blower motor resistor and relay pack and ground. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 23 | -- |
14 | Repair the open in CKT 141 (ORN). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 23 | -- |
15 |
Does the test lamp illuminate? | -- | Go to Step 19 | Go to Step 18 |
16 | Repair the open in CKT 350 (BLK). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 23 | -- |
17 | Replace the blower motor resistor and relay pack. Refer to Blower Motor Resistor Replacement in Heating, Ventilation, and Air Conditioning. Did you complete the replacement? | -- | Go to Step 23 | -- |
18 | Replace the heater and A/C control module. Refer to Control Assembly Replacement in Heating, Ventilation, and Air Conditioning. Did you complete the replacement? | -- | Go to Step 23 | -- |
19 | Using a test lamp backprobe from the heater and A/C control module connector C3 CKT 119 (WHT) cavity A to ground. Does the test lamp illuminate? | -- | Go to Step 21 | Go to Step 20 |
20 | Repair the open in CKT 119 (WHT). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 23 | -- |
21 |
Does the test lamp illuminate? | -- | Go to Step 17 | Go to Step 22 |
22 | Repair the open in CKT 52 (ORN). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 23 | -- |
23 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
