Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you review the automatic level control suspension system operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms | ||||||
2 | Verify that the ALC compressor motor does not activate. Does the ALC system operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||||
3 | Inspect the LD LEV Fuse for an open. Is the fuse open? | -- | Go to Step 4 | Go to Step 5 | ||||||
4 | Repair the short to ground in CKT 1840 (ORN). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Replace the LD LEV Fuse. Is the repair complete? | -- | Go to Step 32 | -- | ||||||
5 |
Is voltage present? | 9-16V | Go to Step 7 | Go to Step 6 | ||||||
6 | Repair the open or high resistance in CKT 1840 (ORN). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 32 | -- | ||||||
7 | Inspect the IGN E Fuse for an open. Is the fuse open? | -- | Go to Step 8 | Go to Step 9 | ||||||
8 | Repair the short to ground in CKT 639 (PNK). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 32 | -- | ||||||
9 | With the ignition switch in the RUN position, test for voltage present at the ALC Air Compressor cavity A. Is voltage present? | 9-16V | Go to Step 11 | Go to Step 10 | ||||||
10 | Repair the open or high resistance in CKT 639 (PNK). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 32 | -- | ||||||
11 | Using a test lamp, connect from the ALC Air Compressor connector cavity E to cavity G. Did the test lamp light? | -- | Go to Step 13 | Go to Step 12 | ||||||
12 | Repair the open or high resistance in CKT 1350 (BLK) or G470. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 32 | -- | ||||||
13 |
Is voltage present? | 9-16V | Go to Step 15 | Go to Step 14 | ||||||
14 | Repair the open or high resistance in CKT 639 (PNK) between the ALC sensor and S473. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 32 | -- | ||||||
15 | Using a test lamp, connect from the ALC sensor connector cavity D to cavity A. Did the test lamp light? | -- | Go to Step 17 | Go to Step 16 | ||||||
16 | Repair the open or high resistance in CKT 1350 cavity A and S471. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 32 | -- | ||||||
17 | Test CKT 1298 (LT BLU) at terminal C for an open circuit. Is an open present in CKT 1298 (LT BLU)? | -- | Go to Step 27 | Go to Step 18 | ||||||
18 | Connect a fused jumper wire from terminal B, CKT 321 (YEL) to ground. Does the pump start and run? | -- | Go to Step 19 | Go to Step 20 | ||||||
19 | Replace the ALC sensor. Refer to Automatic Level Control Sensor and Bracket Replacement . Is the replacement complete? | -- | Go to Step 32 | -- | ||||||
20 | Connect a fused jumper wire from the load leveling pump connector terminal D at CKT 321 (YEL) to ground. Does the pump start and run? | -- | Go to Step 21 | Go to Step 22 | ||||||
21 | Repair the open in CKT 321 (YEL) between the ALC Air Compressor and the ALC sensor. Is the repair complete? | -- | Go to Step 32 | -- | ||||||
22 |
Did you find an open circuit? | -- | Go to Step 23 | Go to Step 24 | ||||||
23 | Repair the open circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 32 | -- | ||||||
24 |
Does the test lamp illuminate? | -- | Go to Step 26 | Go to Step 25 | ||||||
25 | Replace the ALC Air Compressor relay. Refer to Air Compressor Relay Replacement . Is the replacement complete? | -- | Go to Step 32 | -- | ||||||
26 | Replace the ALC Air Compressor. Refer to Air Compressor Replacement . Is the replacement complete? | -- | Go to Step 32 | -- | ||||||
27 |
Is an open present in CKT 1298 (LT BLU)? | -- | Go to Step 28 | Go to Step 29 | ||||||
28 | Repair the open in CKT 1298 (LT BLU) between the ALC timer relay and the ALC sensor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 32 | -- | ||||||
29 | Test CKT 1840 (ORN) at terminal D for an open circuit. Is an open present in CKT 1840 (ORN)? | -- | Go to Step 30 | Go to Step 31 | ||||||
30 | Repair the open in CKT 1840 (ORN). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 32 | -- | ||||||
31 | Replace the ALC timer relay. Refer to Automatic Level Control Relay Replacement . Is the replacement complete? | -- | Go to Step 32 | -- | ||||||
32 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
