P3082
P3082Diagnosis information - Control unit DME (DFI)
Coolant temperature Engine stuck (stuck)
Diagnostic conditions
- Time since Ignition off > 6 hour(s)
- Intake air temperature at Engine start < 45 °C (°F)
- Intake air temperature at Engine start = Ambient temperature +/- 20 °C (°F)
- Engine running > 30 Second(s)
Possible fault causes
- Switch-off time defective = Gateway control module Faulty (See [Information] 1)
- 3/2-way directional-control valve Faulty , at:
- Original Auxiliary heater
- Loose contact or corrosion on connectors or lines
- Coolant temperature sensor Engine Faulty
- Influence by engine-block heater
Fault setting condition(s)
- Engine start temperature > 35 ... > 65 °C (°F) (See [Information] 2)
INFORMATION
1. If the engine switch-off time (formed in the gateway control unit) that is output is greater than the actual value, the engine seems to have cooled down insufficiently.
This can be checked by switching the vehicle off - with the engine at operating temperature - for longer than 6 hours (ignition off). After this time:
- Switch the ignition on and connect the PIWIS Tester.
- Select the following actual values: T020, T030, T040.
- Compare the actual values:
- If the values are close together, the switch-off time calculation is probably incorrect
-->Replace gateway control unit.
- The engine temperature (T020) deviates significantly
-->Check and repair the temperature sensor and wiring
2. Nominal value depending on:
- Time since Ignition off and
- Intake air temperature
Example : Nominal value Engine start temperature max. 65 °C (°F)
- Time since Ignition off 6.1 hour(s) and
- Intake air temperature at Engine start 44 °C (°F)