During the key ON self test of the Air Suspension System the Air Suspension Inlet Vales, Exhaust Valve, and Electronically Controlled Air Suspension Relay are actuated and the voltage draw is calculated by the Air Suspension Control Module.
Ignition on.
Air Suspension Module senses general valve voltage does not agree with command state.
• | Air Suspension functionality is suspended. |
• | SERVICE AIR SUSPENSION message is displayed. |
The DTC will clear when the condition for setting the DTC is removed.
This DTC is set when the general valve circuitry is shorted to ground, voltage and open.
The numbers below refer to the step numbers on the diagnostic table.
During the Air Suspension exhaust valve operation, listen for an audible click. Command the ON and the OFF states. Repeat the commands as necessary.
Verifies that the Air Suspension Module is providing voltage to the Air Suspension Exhaust Valve.
Tests for an open in the ground circuit to the Air Suspension Exhaust Valve.
Tests for constant voltage to the Air Suspension Exhaust Valve.
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Suspension Controls Schematics | |||
1 | Did you perform the Air Suspension Diagnostic System Check? | Go to Step 2 | |
Does the exhaust valve and inlet valves turn ON and OFF with each command? | Go to Diagnostic Aids | Go to Step 3 | |
Probe the control circuit of the exhaust valve and inlet valves with a test lamp that is connected to ground. Does the test lamp turn ON and OFF with each command? | Go to Step 4 | Go to Step 5 | |
Does the test lamp turn ON and OFF with each command? | Go to Step 8 | Go to Step 10 | |
Does the test lamp remain illuminated with each command? | Go to Step 7 | Go to Step 6 | |
6 | Test the control circuit of the exhaust valve and inlet valves for a short to ground or an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 9 |
7 | Test the control circuit of the exhaust valve and inlet valves for a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 9 |
8 | Inspect for poor connections at the exhaust valve and inlet valves. Refer to Testing for Intermittent Conditions and Poor Connections and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 11 |
9 | Inspect for poor connections at the harness connector of the Air Suspension Module. Refer to Testing for Intermittent Conditions and Poor Connections and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 12 |
10 | Repair the ground circuit of the exhaust valve and inlet valves. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | -- |
11 | Replace the Air Suspension Exhaust Valve or Inlet Valve's. Refer to Air Spring Compressor Replacement . Did you complete the replacement? | Go to Step 13 | -- |
12 |
Important: Always perform the check trim height procedure after Air Suspension Module replacement.
Did you complete the replacement? | Go to Step 13 | -- |
13 |
Does the DTC reset? | Go to Step 2 | System OK |