Circuit Description
The left air suspension sensor arm is attached to an armature that rotates inside a coil. The air suspension compressor assembly determines the angle of the sensor arm by measuring the voltage of the left air suspension sensor signal at 50 ms intervals via the left air suspension sensor signal circuit.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC 002 Left Rear Position Sensor Circuit
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The air suspension compressor assembly detects a invalid height sensor signal.
Action Taken When the DTC Sets
The air suspension compressor assembly shall disregard the left air suspension sensor input and use the right air suspension sensor to determine the vehicle height.
If both air suspension sensor DTCs are set, the air suspension compressor assembly shall deactivate the compressor, corner solenoids, and exhaust solenoids. All leveling functions will be disabled. Inflator functions will not be disabled.
Conditions for Clearing the DTC
The DTC will automatically clear when the condition for setting the DTC is removed.
Diagnostic Aids
Resistance of the air suspension sensor at room temperature and normal vehicle height is approximately 87 ohms. The resistance range of the sensor is 75-100 ohms.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
Schematic Reference: Air Suspension Schematics | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 | Verify the fault is present. Does the system operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 |
Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 4 |
4 | Test the air suspension return circuit for an open, short to voltage, and a short to ground. Refer to the following: Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 5 |
5 | Measure the resistance of the air suspension sensor. Does the resistance measure within the specified value? | 75-100 Ohms | Go to Step 6 | Go to Step 9 |
6 | Inspect for poor connections at the harness connector of the left air suspension sensor. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 7 |
7 | Inspect for poor connections at the harness connector of the air suspension compressor assembly. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 8 |
8 | Replace the air suspension compressor assembly. Refer to Automatic Level Control Air Compressor Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
9 | Replace the left air suspension sensor. Refer to Air Spring Leveling Sensor Replacement . Did you complete the replacement? | -- | Go to Step 10 | -- |
10 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 1 |
