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 is always on. Does the ALC system operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the ALC air compressor pump stop running? | -- | Go to Step 4 | Go to Step 9 |
4 | Test CKT 1250 (BLK) at terminal F, of the ALC timer relay for a short to ground. Is a short to ground present in CKT 1250 (BLK)? | -- | Go to Step 5 | Go to Step 8 |
5 |
Is a short to ground present in CKT 1250 (BLK)? | -- | Go to Step 6 | Go to Step 7 |
6 | Repair the short to ground in CKT 1250 (BLK). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 16 | -- |
7 | Replace the ALC inflator air switch. Refer to Automatic Level Control Inflator Air Switch Replacement . Is the replacement complete? | -- | Go to Step 16 | -- |
8 | Replace the ALC timer relay. Refer to Automatic Level Control Relay Replacement . Is the replacement complete? | -- | Go to Step 16 | -- |
9 | Disconnect the ALC sensor. Does the ALC Air Compressor pump stop running? | -- | Go to Step 10 | Go to Step 11 |
10 | Replace the ALC sensor. Refer to Automatic Level Control Sensor and Bracket Replacement . Is the replacement complete? | -- | Go to Step 16 | -- |
11 |
Is a short to ground present in CKT 321 (YEL) | -- | Go to Step 12 | Go to Step 13 |
12 | Repair the short to ground in CKT 321 (YEL). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 16 | -- |
13 |
Does the ALC Air Compressor pump run? | -- | Go to Step 14 | Go to Step 15 |
14 | Repair the short to voltage on the BLK/LT GRN wire. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 16 | -- |
15 | Replace the relay in the ALC Air Compressor. Refer to Air Compressor Relay Replacement . Is the replacement complete? | -- | Go to Step 16 | -- |
16 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
