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 HVAC fuse in the fuse block. Is the HVAC fuse open? | -- | Go to Step 3 | Go to Step 4 |
3 | 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 14 | -- |
4 |
Does the test lamp light? | -- | Go to Step 6 | Go to Step 5 |
5 | Locate and repair a poor connection or an open in circuit 41 (BRN). Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 14 | -- |
6 |
Does the test lamp light? | -- | Go to Step 9 | Go to Step 7 |
7 | Inspect for a poor connection or an open in circuit 361 (PPL). Is a poor connection or open in the circuit? | -- | Go to Step 8 | Go to Step 12 |
8 | Locate and repair the fault in circuit 361 (PPL). Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 14 | -- |
9 |
Is a short to ground on the circuit? | -- | Go to Step 10 | Go to Step 13 |
10 | Test for a short to ground on circuit 706 (LT BLU) at the heater-A/C control connector C2, terminal A8. Refer to Testing for Short to Ground in Wiring Systems. Is a short to ground on the circuit? | -- | Go to Step 11 | Go to Step 12 |
11 | Locate and repair the short to ground in circuit 706 (LT BLU) between the heater-A/C control harness connector and the vacuum/electric solenoid harness connector. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 14 | -- |
12 | Replace the heater-A/C control. Refer to Control Assembly Replacement . Is the repair complete? | -- | Go to Step 14 | -- |
13 | A fault exists in the vacuum/electric solenoid, the vacuum source, the vacuum actuators, the vacuum hoses to actuators, the linkage from actuators to values; or the valves are faulty. Refer to Vacuum System for further diagnosis. Is the action complete? | -- | Go to Step 14 | -- |
14 | Verify that the system operates properly. Does the system operate properly? | -- | System OK | Go to Step 2 |
