C0620

Circuit Description
The position sensor provides an analog signal voltage between 0.5 and 4.5 volts to the suspension control module. This signal voltage represents the wheel's position relative to the body. The suspension control module provides a 5.0 volt reference and a low reference to the sensor. Conditions for Running the DTC Under normal driving conditions. Vehicle speed greater than 0 kph (0 mph). Conditions for Setting the DTC The suspension control module senses a position sensor signal voltage below 0.5 volts or above 4.5 volts.


Action Taken When the DTC Sets
^ DTC C0620 will be stored in memory.
^ The SERVICE RIDE CONTROL message will be displayed.
^ All four dampers will be commanded to their off state.


Conditions for Clearing the MIL/DTC
^ The suspension control module no longer senses a position signal voltage out of range with vehicle speed greater than 0 kph (0 mph).
^ A history DTC will clear after not seeing the malfunction for 100 consecutive ignition cycles.
^ Using a scan tool.


Diagnostic Aids

Important: Before proceeding with the diagnosis do a visual inspection of the mechanical aspects of the sensor and its components. Ensure the sensor and the sensor link is not bent, disconnected, or insulation on wires are not rubbed through or damaged in any way.

If DTC C0870 is present, perform the diagnosis for DTC C0870 first.
^ A faulty sensor voltage reading may result if the vehicle is on a host that allows the suspension to hang free.
^ The following conditions may cause a malfunction to occur:
^ A short to voltage on the 5 volt reference circuit.
^ A short to ground on the 5 volt reference circuit.
^ A open in the 5 volt reference circuit to the RF position sensor.
^ A short to voltage on the RF position signal circuit.
^ A short to ground on the RF position signal circuit.
^ A open in the RF position signal circuit.
^ A open in the RF position sensor low reference circuit.
^ A malfunctioning RF position sensor.
^ A disconnected, bent or damaged sensor link.


Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
1. Perform the RTD Diagnostic System Check before proceeding.
2. Check the sensor data parameter.
3. Tests for the proper operation of the circuit in the high voltage range.
4. Tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.
5. Tests for a short to ground in the 5 volt reference circuit.
7. Test for a short to voltage, a high resistance, and an open.

Important: When replacing the suspension control module the replacement module must be calibrated.