Volkswagen CPYC - Evaluating Measured Value Blocks at Full Load (Engine Code CPYB); Conditions for Measurements at Full Load

Display
zone
Operating mode or component Specification Evaluation
3 Charge pressure (actual) 1600...1900 mbar
⇒ Page 129
4 Duty cycle of charge pressure control sol-
enoid valve
35...70 % ---
Evaluation: display group 11, display zone 3 - charge pres-
sure (actual)
Display shows Possible cause of fault Fault remedy
Below specification
◆ Leaks between turbocharger and en-
gine (charge air system)
◆ Charge pressure control defective
– Checking charge air system for leaks
⇒ Page 331
– Checking charge pressure control
⇒ Page 333.
Above specification
◆ Charge pressure control defective
◆ Turbocharger defective
– Checking charge pressure control
⇒ Page 333.
◆ Defective charge pressure sender
-G31-
– -G31- Check. ⇒ Page 343
6.5 Evaluating measured value blocks at
full load (engine code CPYB)
Note conditions for measurements at full load ⇒ Page 129.
Display group:
◆ 1 - Injected quantity ⇒ Page 130,
◆ 3 - Exhaust gas recirculation ⇒ Page 130,
◆ 8 - Torque limit 1 ⇒ Page 131,
◆ 11 - Charge pressure control ⇒ Page 132,
6.5.1 Conditions for measurements at full load
Always follow safety precautions ⇒ Page 110.
Read measured value block ⇒ Page 110.
Note
Due to the various use cases of industrial engines, check
whether the engine attains full load under the respective operat-
ing conditions before performing measurements at full load.
– At full load, increase engine speed from 1500 rpm to full
throttle (accelerator pedal position sender at end stop).
– Have a second person read the measured values at approx.
2300 rpm.
– Exit diagnosis function.
– Switch off ignition.
Industriemotoren - Industrial Engines 2009 ▶
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
3
6 Measured value blocks, engine codes CPYA, CPYB, CPYC, CPYD, CPYE, CPYF, CPYG
129