Automatic Level Control System Does Not Vent to Lower Vehicle without Inflator
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Automatic Level Control Schematics | |||
1 | Did you review the Automatic Level Control System Description and Operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Does the test lamp illuminate? | Go to Step 3 | Go to Step 14 |
3 | Connect a test lamp between the battery positive voltage circuit and the ground circuit of the ALC sensor. Does the test lamp illuminate? | Go to Step 4 | Go to Step 11 |
4 |
Does the test lamp illuminate? | Go to Step 5 | Go to Step 12 |
5 | Connect a 10 A fused jumper wire between the ALC exhaust solenoid control circuit of the ALC sensor and a good ground. Does the exhaust solenoid activate and vent air? | Go to Step 15 | Go to Step 6 |
6 | Inspect the fuse in the jumper wire. Did the fuse in the jumper open? | Go to Step 13 | Go to Step 7 |
7 |
Does the test lamp illuminate? | Go to Step 8 | Go to Step 9 |
8 | Connect a test lamp between the battery positive voltage circuit and the exhaust signal circuit of the ALC air compressor connector. Does the test lamp illuminate? | Go to Step 16 | Go to Step 10 |
9 | Repair the open in the battery positive voltage circuit of the ALC air compressor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | -- |
10 | Repair the open in the ALC exhaust solenoid control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | -- |
11 | Repair the open in the ground circuit of the ALC sensor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | -- |
12 | Repair the open in the accessory voltage circuit of the ALC sensor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | -- |
13 | Repair the short to voltage in the ALC exhaust solenoid control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | -- |
14 | Repair the open in the battery positive voltage circuit of the ALC sensor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 17 | -- |
15 | Replace the ALC sensor. Refer to Automatic Level Control Sensor Replacement . Did you complete the replacement? | Go to Step 17 | -- |
16 | Replace the ALC air compressor head. Refer to Automatic Level Control Air Compressor Head Replacement . Did you complete the replacement? | Go to Step 17 | -- |
17 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
Automatic Level Control System Does Not Vent to Lower Vehicle With Inflator
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Automatic Level Control Schematics | |||
1 | Did you review the Automatic Level Control System Description and Operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Does the test lamp illuminate? | Go to Step 3 | Go to Step 9 |
3 | Connect a test lamp between the ALC height sensor circuit and the ground circuit of the ALC sensor. Does the test lamp illuminate? | Go to Step 4 | Go to Step 13 |
4 |
Does the test lamp illuminate? | Go to Step 5 | Go to Step 14 |
5 | Connect a 10 A fused jumper wire between the ALC exhaust solenoid control circuit of the ALC sensor and a good ground. Does the exhaust solenoid activate and vent air? | Go to Step 19 | Go to Step 6 |
6 | Inspect the fuse in the jumper wire. Did the fuse in the jumper open? | Go to Step 15 | Go to Step 7 |
7 |
Does the test lamp illuminate? | Go to Step 8 | Go to Step 11 |
8 | Connect a test lamp between exhaust solenoid battery positive voltage circuit and the exhaust solenoid control circuit of the ALC air compressor connector. Does the test lamp illuminate? | Go to Step 20 | Go to Step 12 |
9 | Probe with a test lamp between the battery positive voltage circuit of the ALC air inflator relay and a good ground. Does the test lamp illuminate? | Go to Step 10 | Go to Step 16 |
10 | Probe with a test lamp between the ALC height sensor circuit of the ALC air inflator relay and a good ground. Does the test lamp illuminate? | Go to Step 17 | Go to Step 18 |
11 | Repair the open in the battery positive voltage circuit of the ALC air compressor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- |
12 | Repair the open in the ALC exhaust solenoid control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- |
13 | Repair the open in the ground circuit of the ALC sensor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- |
14 | Repair the open in the accessory voltage circuit of the ALC sensor. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- |
15 | Repair the short to voltage in the ALC exhaust solenoid control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- |
16 | Repair the open in the battery positive voltage circuit of the ALC air inflator relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- |
17 | Repair the open in the ALC height sensor circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 21 | -- |
18 | Replace the ALC air inflator relay. Refer to Automatic Level Control Relay Replacement . Did you complete the replacement? | Go to Step 21 | -- |
19 | Replace the ALC sensor. Refer to Automatic Level Control Sensor Replacement . Did you complete the replacement? | Go to Step 21 | -- |
20 | Replace the ALC air compressor head. Refer to Automatic Level Control Air Compressor Head Replacement . Did you complete the replacement? | Go to Step 21 | -- |
21 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
