Diagnostic Trouble Code (DTC) Diagnosis

This section provides the following aids in order to locate and repair the problem:
^ Diagnostic tables
^ Wiring diagrams
^ Descriptive text

The diagnostic table is a step-by-step procedure in order to determine the circuit or component that is the source of the problem. The wiring diagrams and text describing the system, test conditions, failure conditions and actions taken when a DTC is set are located on the page facing the diagnostic table. Diagnostic Trouble Codes (DTC)s, when set, indicate that the IPC has detected a malfunction in a particular circuit or other system. Other system malfunctions are generally (but not exclusively) reported to the IPC via Class 2 data message. The IPC is programmed with routines for internal checks that are followed only under prescribed conditions (Test Conditions). When these conditions exist, the IPC inspects certain circuits or systems for a malfunction. These inspections are called Failure Conditions or Conditions for Setting the DTC. When these conditions are true, a DTC is set. The IPC may turn a Telltale Malfunction Indicator Lamp (MIL) ON. Refer to the Applicable DTC Table for procedures and details.