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Home >> Volkswagen >> 2001 >> Golf GLS, 1.8 C, Standard >> Repair and Diagnosis >> Engine Performance >> Ignition System >> 1.8L - Fuel Injection & Ignition, Engine Code(S): AWD >> 01 On Board Diagnostic (OBD) >> Measuring value blocks, evaluating, display groups 0-9 (basic functions) >> Measuring value blocks, evaluating, display groups 0-9 (basic functions) >> Display group 4 -basic functions-
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Display group 4 -basic functions-

Display group 4 -basic functions- 
  • Engine running at idle
Read Measuring Value Block 4 ← Indicated on display:    
xxxx/min xx.xxx V xxx.x ° C xxx.x ° C      
1 2 3 4 ← Display fields Specified value Evaluation
        Intake Air Temperature (IAT) -48 to 110 ° C Refer to Evaluation display group 4, display field 4 - intake air temperature 
      Coolant temperature 80 to 110 ° C Refer to Evaluation display group 4, display field 3 - coolant temperature 
    Voltage supply for Engine Control Module (ECM) 12.0 to 15.0 V Refer to Evaluation display group 4, display field 2 - control module voltage supply 
  Engine speed (idle speed)
Manual transmission
Automatic transmission
700 to 820 RPM
640 to 760 RPM
Refer to Evaluation display group 1, display field 1 - engine speed (idle speed) 

Note for display field 3: 

When a DTC relating to the Engine Coolant Temperature (ECT) sensor -G62- is stored in DTC memory, the Engine Control Module (ECM) starts using the intake air temperature as a replacement value when starting the engine (starting temperature replacement value). After this, the temperature rises according to a mapping specification stored in the control module. For a warm engine, a fixed replacement value is used after a certain period of time. This fixed replacement value is also dependent on the intake air temperature. 

Note for display field 4: 

The entire temperature range is indicated as a specified value. The indicated value must be above the ambient air temperature.