The general valve fault DTC is set when one of the valves fail.
This diagnostic procedure supports the following DTC:
DTC C0702 Level Control Accessory Valve Circuit
The ignition is 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: Air Suspension Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
Does the exhaust valve turn ON and OFF with each command? | Go to Diagnostic Aids | Go to Step 3 | |
Probe the control circuit of the exhaust valve 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 for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 13 | Go to Step 9 |
7 | Test the control circuit of the exhaust valve for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 13 | Go to Step 9 |
8 | Inspect for poor connections at the exhaust valve. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs. 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 Wiring Repairs. Did you find and correct the condition? | Go to Step 13 | Go to Step 12 |
10 | Repair the ground circuit of the exhaust valve. Refer to Wiring Repairs. Did you complete the repair? | Go to Step 13 | -- |
11 | Replace the air suspension exhaust valve. Refer to Compressor Assembly Automatic Level Control Air Replacement . Did you complete the replacement? | Go to Step 13 | -- |
12 |
Did you complete the replacement? | Go to Step 13 | -- |
13 |
Does the DTC reset? | Go to Step 2 | System OK |