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:
P-Codes
U-Codes
DTC Memory, Checking
Procedure
- Connect diagnostic tester.
NOTE: If the engine does not start, crank engine using starter for at least 5 seconds, do not switch ignition off 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 lighting up of Malfunction Indicator Lamp (MIL) -K83-.
- Electronic throttle 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 Purge Regulator Valve Malfunctioning wiring path or malfunctioning component
Circuit Open Malfunction type as text
- Repair stored malfunction(s) according to DTC table:
- SAE P0xxx-DTCs. P0010
- SAE P2xxx-DTCs. P2096
- SAE P3xxx-DTCs. P3081
- SAE U0xxx-DTCs. U0001
Final procedures
The following work steps must be performed in the described sequence after the malfunction(s) have been repaired:
1. Check DTC memory See "Mode 3: Check DTC memory" Mode 3: Check DTC Memory
2. If necessary, erase DTC memory See "Mode 4: Reset/erase diagnostic data". Mode 4: Reset/Erase Diagnostic Data
3. Generate readiness code. Readiness Code, Generating
- End diagnosis and switch ignition off.