Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the heater-A/C Diagnostic System Check performed? | -- | Go to Step 2 | Go to Diagnostic System Check |
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) between S233 and the vacuum/electric solenoid. Refer to Testing for Intermittent Conditions and Poor Connections and Circuit Testing 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 open in circuit 366 (LT GRN/BLK). Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Is there a poor connection or open in the circuit? | -- | Go to Step 8 | Go to Step 12 |
8 | Locate and repair the poor connection or open in circuit 366 (LT GRN/BLK). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 14 | -- |
9 |
Does the test lamp light? | -- | Go to Step 10 | Go to Step 13 |
10 | Use a digital multimeter (DMM) in order to test for a short to ground between the heater-A/C control harness connector terminal D10 and the vacuum/electric solenoid harness connector, terminal 2. Is there a short to ground? | -- | Go to Step 11 | Go to Step 12 |
11 | Locate and repair the short to ground in circuit 362 (RED). Refer to Circuit Testing and 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 | Replace the vacuum/electric solenoid. Refer to Vacuum Electrical Solenoid Replacement . Is the repair complete? | -- | Go to Step 14 | -- |
14 | Verify that the system operates properly. Does the system operate properly? | -- | System OK | Go to Diagnostic System Check |
