Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Automatic Level Control Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Is the rear of the vehicle low? | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
3 | Inspect all air tubes and fittings for leaks. Did you find and correct the condition? | Go to Step 12 | Go to Step 4 |
4 |
Does the compressor turn ON and OFF with each command? | Go to Step 5 | Go to Step 7 |
5 |
Does the test lamp illuminate? | Go to Step 6 | Go to Step 7 |
6 | Connect a 20-amp fused jumper wire between the battery positive voltage circuit of the compressor motor relay and the compressor control circuit of the compressor motor relay. Does the compressor motor turn ON? | Go to Step 11 | Go to Step 8 |
7 | Test the compressor control circuit of the compressor motor relay for an open, short to ground, and high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 8 |
8 | Test the positive battery voltage circuit of the compressor motor for an open and high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 9 |
9 | Test the ground circuit of the compressor motor for an open and high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 10 |
10 | Replace the compressor leveling module. Refer to Air Compressor Replacement . Did you complete the replacement? | Go to Step 12 | -- |
11 | Replace the compressor motor relay. Did you complete the replacement? | Go to Step 12 | -- |
12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
