Diagnostic Mode 03 - Read DTC Memory

Diagnostic Mode 03 - Read DTC Memory

Diagnostic Mode 03 makes it possible to read emissions-related faults (confirmed DTCs: faults which have activated the MIL) in the ECM and in the TCM.

When the Engine Control Module (ECM) recognizes an emission related fault it turns on the Malfunction Indicator Lamp (MIL) or if a Electronic Throttle Malfunction is recognized, the Engine Control Module (ECM) turns on the Electronic Power Control (EPC) Warning Lamp which are both located in the instrument cluster.

Diagnostic Mode 03 is used to retrieve and view any DTC which may be stored in the Engine Control Module (ECM).

The DTC's are sorted by SAE code with the DTC tables consisting of a 5-digit alpha-numeric value.

• Depending on scan tool and protocol used, diagnostic mode 03 and the information provided may be referred to by a different name.

The following tables provide a breakdown and explanation of the DTC code.

P-Codes











U-Codes






Procedure

- Connect the scan tool.

- Switch the ignition to the "ON" position.

- Select "Diagnostic Mode 03: Interrogating fault memory ".

- The stored DTC or DTC's will be displayed on the scan tool screen.

The following table is an example of the DTC information that may be displayed on the scan tool screen:






- Refer to the DTC tables for the diagnostic repair procedure.

Fuel, air mixture, and additional emissions regulations

- Switch the ignition off.

- End of diagnosis.