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 27 | -- |
4 | Inspect the RR Heat A/C 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 27 | -- |
6 |
Does the test lamp illuminate? | -- | Go to Step 7 | Go to Step 8 |
7 | Connect a test lamp between CKT 1172 (YEL) and CKT 1150 (BLK) at the rear heater blower motor. Does the test lamp illuminate? | -- | Go to Step 9 | Go to Step 11 |
8 |
Does the test lamp illuminate? | -- | Go to Step 12 | Go to Step 13 |
9 | Inspect for a poor connection at the rear heater blower motor. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Did you find a poor connection? | -- | Go to Step 10 | Go to Step 14 |
10 | Repair the poor connection. Refer to Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 27 | -- |
11 | Repair the open in CKT 1150 (BLK). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 27 | -- |
12 | Connect a test lamp between CKT 141 (BRN) cavity A7 at the A/C enable relay (rear) to ground. Does the test lamp illuminate? | -- | Go to Step 15 | Go to Step 16 |
13 | Repair the open in CKT 1040 (ORN). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 27 | -- |
14 | Replace the rear heater blower motor. Refer to Refrigerant Recovery and Recharging in Heating, Ventilation, and Air Conditioning. Did you complete the replacement? | -- | Go to Step 27 | -- |
15 | Connect a test lamp between CKT 141 (BRN) cavity A7 to CKT 850 (BLK) cavity B9 at the A/C enable relay (rear). Does the test lamp illuminate? | -- | Go to Step 17 | Go to Step 18 |
16 | Repair the open in CKT 141 (BRN). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 27 | -- |
17 |
Does the test lamp illuminate? | -- | Go to Step 19 | Go to Step 20 |
18 | Repair the open in CKT 850 (BLK). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 27 | -- |
19 | Using a test lamp backprobe from the rear heater switch CKT 1923 (ORN) cavity G to ground. Does the test lamp illuminate? | -- | Go to Step 21 | Go to Step 22 |
20 | Replace the A/C enable relay (rear). Refer to Blower Motor Relay Replacement in Heating, Ventilation, and Air Conditioning. Did you complete the replacement? | -- | Go to Step 27 | -- |
21 | Using a test lamp backprobe from the rear heater switch CKT 1924 (WHT) cavity A to ground. Does the test lamp illuminate? | -- | Go to Step 23 | Go to Step 24 |
22 | Repair the open in CKT 1923 (ORN). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 27 | -- |
23 | Using a test lamp backprobe from the rear heater resistor pack CKT 1924 (WHT) cavity B to ground. Does the test lamp illuminate? | -- | Go to Step 25 | Go to Step 26 |
24 | Replace the rear heater switch. Refer to Control Switch Replacement - Auxiliary in Heating, Ventilation, and Air Conditioning. Did you complete the replacement? | -- | Go to Step 27 | -- |
25 | Repair the open in CKT 1172 (YEL). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 27 | -- |
26 | Repair the open in CKT 1924 (WHT), CKT 1925 (RED) and CKT 1926 (DK BLU). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 27 | -- |
27 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
