The air suspension sensor provides a signal voltage between 0.3-4.7 volts to the air suspension module. This signal voltage represents the wheel's position relative to the body. The air suspension module provides a 5-volt reference and a low reference to the sensor.
At power-up and continuous when ignition is activated.
The air suspension module senses a suspension sensor voltage below 0.3 volts or above 4.7 volts.
• | 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 for a high or low signal to the air suspension module from the air suspension sensor-LR.
The numbers below refer to the step numbers on the diagnostic table.
This step checks the air suspension sensor-LR data parameter.
This step tests for the proper operation of the circuit in the high voltage range.
This step tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens upon performing this test, the signal circuit has a short to voltage.
This step tests for a short to ground in the 5-volt reference circuit.
This step tests the 5-volt reference circuit for the air suspension sensor-LR.
Step | Action | Values | Yes | No | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Suspension Controls Schematics | ||||||||||
1 | Did you perform the Air Suspension System Diagnostic System Check? | -- | Go to Step 2 | |||||||
Is the Left Height Sensor parameter within the specified range? | 0.3-4.7 V | Go to Diagnostic Aids | Go to Step 3 | |||||||
Is the Left Height Sensor parameter more than the specified value? | 0.3 V | Go to Step 4 | Go to Step 8 | |||||||
Is the Left Height Sensor parameter less than the specified value? | 0.3 V | Go to Step 5 | Go to Step 9 | |||||||
Is the Left Height Sensor 5 volt reference voltage greater than the specified value? | 4.7 V | Go to Step 7 | Go to Step 6 | |||||||
6 | Test the 5-volt reference circuit of the air suspension sensor-LR for a short to ground. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 15 | Go to Step 12 | ||||||
Test the 5-volt reference circuit of the air suspension sensor-LR for one of the following conditions:
Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 15 | Go to Step 11 | |||||||
8 | Test the signal circuit of the air suspension sensor-LR 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 15 | Go to Step 12 | ||||||
9 | Test the signal circuit of the air suspension sensor-LR for one of the following conditions:
Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 15 | Go to Step 10 | ||||||
10 | Test the low reference circuit of the air suspension sensor-LR for one of the following conditions:
Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 15 | Go to Step 12 | ||||||
11 | Inspect for poor connections at the harness connector of the air suspension sensor-LR. 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 15 | Go to Step 13 | ||||||
12 | 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 15 | Go to Step 14 | ||||||
13 | Replace the air suspension sensor-LR. Refer to Air Spring Leveling Sensor Replacement . Did you complete the replacement? | -- | Go to Step 15 | -- | ||||||
14 |
Important: Always perform the check trim height procedure after air suspension module replacement.
Did you complete the replacement? | -- | Go to Step 15 | -- | ||||||
15 |
Does the DTC reset? | -- | Go to Step 2 | System OK |