Mode 3: Check DTC Memory

Mode 3: Check DTC Memory

This diagnostic mode indicates all stored DTCs of components and systems which are emission relevant.

Malfunction Indicator Lamp (MIL) -K83- in instrument cluster lights up for one DTC entry.

SAE Diagnostic Trouble Codes (DTCs)

The DTC consists of a 5-digit alpha-numeric value with the following meaning:












DTC Memory, Checking

Procedure
- Connect diagnostic tester. Connect Diagnostic Tester
- Start engine and let run at idle.

NOTE: If the engine does not start, crank engine using starter for at least 5 seconds, do not switch off ignition afterward under any circumstances.

- In diagnostic function "33 - OBD", select "Mode 3: Check DTC memory."

The number of stored malfunctions or "0 malfunctions detected" is displayed.

NOTE:
- The DTC tables are sorted by SAE code.
- Stored malfunctions of Engine Control Module (ECM) are displayed under "10 - Engine electronics" and stored malfunctions of Transmission Control Module (TCM) are displayed under "1A - Transmission electronics".
- In addition, emission-relevant malfunctions are indicated in the instrument cluster via the Malfunction Indicator Lamp (MIL) -K83-.
- EPC -relevant malfunctions are also indicated by the Electronic Power Control (EPC) Warning Lamp -K132- ("EPC warning lamp") in the instrument cluster.
- In "Mode 2: Check operating conditions", it can be determined at which operating condition the Engine Control Module detected and stored a malfunction.

Indication example Explanation
P0444 SAE Diagnostic Trouble Code (DTC)
Evaporative Emission (EVAP) Canister malfunctioning wiring path or
Purge Regulator Valve -N80- malfunctioning component
Open circuit Malfunction type as text

- Repair stored malfunction(s) according to DTC table:
- SAE P0xxx-DTCs. P0011
- SAE P1xxx-DTCs. P1176
- SAE P2xxx-DTCs. P2101

Final procedures
The following work steps must be performed in the described sequence after the malfunction(s) have been repaired:

1. Check DTC memory. Mode 3: Check DTC Memory
2. If necessary, erase DTC memory. Mode 4: Reset/Erase Diagnostic Data
3. Generate readiness code. Readiness Code, Generating

- End diagnosis and switch ignition off.