Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic mode 2: Check operating conditions
Function
This diagnostic mode displays the operating conditions at which an emission relevant malfunction was detected and stored by the control module for Diesel-Direct fuel injection system or the Transmission Control Module (TCM).
Work procedure
- Connect diagnostic tester. Refer to Diagnostic tester, connecting .
- Depending on the desired operating condition: switch on ignition
or start engine and let run at idle.
- Under address word 33, select "Diagnostic mode 2: Check operating conditions."
- Select desired operating condition "PID XX".
- The following list only serves as an overview.
- The operating conditions are sorted by the PID (parameter-identifications).
| PID |
Diagnostic mode |
Module number 10 Engine Electronics |
Module number 1A Transmission Electronics |
||
| 02: | DTC which triggered the current reception of all control module information | X | X | ||
| 04: | Calculated load condition value | X | X | ||
| 05: | Coolant temperature | X | X | ||
| 11: | Intake manifold pressure | X | --- | ||
| 12: | Engine rotations per minute (RPM) | X | X | ||
| 13: | Vehicle speed | X | X | ||
| 14: | Valve timing adjustment at 1. cyl. to "advance" | X | --- | ||
| 15: | Intake Air Temperature (IAT) | X | --- | ||
| 16: | Air flow quantity at Mass Air Flow (MAF) sensor | X | --- | ||
| 17: | Pedal value sensor (%) | X | X | ||
If DTCs are displayed in "PID 02":
- Repair stored malfunctions according to DTC table:
- SAE P0xxx-DTCs.
- SAE P1xxx-DTCs.
- SAE P2xxx-DTCs.
- The DTC table is sorted by SAE code.
- "Emission"-relevant malfunctions are indicated in the instrument cluster via the exhaust Malfunction Indicator Lamp (MIL).
- Erase DTC memory after repairing malfunction. Refer to Diagnostic mode 4: Reset/erase diagnostic data .
- End diagnosis and switch ignition off.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.