GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The System OK code is used to identify that the self test has found no faults with the automatic level control system.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC 012 System OK

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC

No DTCs are set after self test has been completed.

Action Taken When the DTC Sets

Automatic level control system functions normally.

Conditions for Clearing the DTC

The conditions that caused the DTC to set have been removed.

Step

Action

Yes

No

Schematic Reference: Automatic Level Control Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

The automatic level control system is functioning normally.

Is this code present after self test?

System OK

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