Display group 15: Instrument cluster interior temperature sensor -G56-, calculated or determined by coolant temperature transferred into instrument cluster and sunlight photo sensor -G107-
- for electrical test, see AUTOMATIC CLIMATE CONTROL SYSTEM, ELECTRICAL TESTS .
NOTE:
The measuring value of a malfunctioning temperature sensor is suppressed by A/C control head -E87- and for further control -E87- uses an internal calculated value (this value is also indicated).
NOTE:
Notes to display field 2:
- The coolant temperature is calculated by A/C control head -E87- with part number up to Index "K" under the influence of different input signals (engine RPM, engine running time, determined outside temperature, vehicle at standstill etc.)
- For vehicles with control head having part number beginning with index letter "M," the coolant temperature from the instrument cluster is calculated, and the calculated value is transferred via the Can-Bus -E87-. If the instrument cluster can not supply requested information due to a component malfunction, a malfunction notice with data gram is sent, which requires DTC memory be checked. See ON BOARD DIAGNOSTIC (OBD) .
- Reception of information from instrument cluster is indicated in measuring value block display group 012. See DISPLAY GROUP 012: INFORMATION ON CAN-BUS FOR CONTROL HEAD HAVING PART NUMBERS BEGINNING WITH THE INDEX LETTER "M" .