With RPO JL4

DTC C0283 (w/JL4)





Test 1-3





Test 4-14

Circuit Description
The VSES mode switch is a momentary-contact switch that can be used to limit the VSES function. Each time the mode switch is pressed, the VSES full stability/limited status changes. When the VSES mode switch is released, voltage on the VSES mode switch signal circuit is approximately 4.5 volts. When the VSES mode switch is pressed, voltage on the VSES mode switch signal circuit is approximately 9 volts.

Conditions for Running the DTC
In order to detect a continuously low or high VSES mode switch signal:
The ignition is ON.
OR:
In order to detect a continuously pressed VSES mode switch:
^ The ignition is ON.
^ The engine speed is greater than 450 RPM.

Conditions for Setting the DTC
Either of the following conditions may cause DTC C0283 to set:
^ The VSES mode switch signal is detected as excessively low or high for 200 milliseconds.
^ The VSES mode switch is detected as pressed for 60 seconds.

Action Taken When the DTC Sets
^ The EBCM disables the VSES.
^ The message center displays the SERVICE STABILITY SYSTEM message.

Conditions for Clearing the DTC
The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.

Diagnostic Aids
Press and release the VSES mode switch several times while observing the message center in order to verify that the VSES full stability/limited status changes each time the switch is pressed and that DTC C0283 does not set. Using the scan tool in order to observe the Mode Switch Pressed or Released status may also be helpful in diagnosing an intermittent fault within the switch.
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction.

Test Description
The number below refers to the step number on the diagnostic table.
4. This step tests for voltage on the VSES mode switch signal circuit indicating an unpressed VSES mode switch.
5. This step tests for voltage on the VSES mode switch signal circuit indicating a pressed VSES mode switch.