TT261703

Technical Tips
Technical Tip
Topic
26-17-03TT - 2015 Gen III TDI AdBlue® Light, SCR Light Will Not Reset
Market area
United States 444 Volkswagen of America, Inc. (6444)
Brand
Volkswagen
Date
March 03, 2017
Condition
ATTENTION:
THIS IS A TECH TIP, NOT A TECHNICAL BULLETIN AS TITLED.
TECH TIPS ARE NOT ASSOCIATED WITH WARRANTY CLAIMING.
SCR Line Heater Circuit Re-initialize
Model(s)
Year
Eng. Code
Trans. Code
VIN Range From
VIN Range To
Golf, Passat,
Beetle, Jetta,
Sportwagen
2015
2.0l TDI
CRUA/CVCA
All
All
All
Technical Background
2015 Gen III TDI AdBlue® Light, SCR Light ON, may set DTC P208B or display no faults due to system repair.
SCR line heater circuits need to be re -initialized in the ECM. Heater circuit 1 for SCR tank and pump, heater circuit 2
SCR lines -Z104- need to be selected in output diagnostic mode through control module OBD. Activating the SCR
heater circuits clears learned values in the ECM allowing the SCR light to be reset with no parts replacement needed.
Service
Using O.D.I.S.:
1)
2)
3)
4)
5)
6)
7)
8)
Navigate to control module OBD (Can be performed KOEO at this point)
Output Diagnosis
Adaptation heater circuit and adaptation heater circuit 2
Click forward button, bottom right, 2 times.
From measured values list, select IDE: 03133, 03137, 03134 and 03138
Click forward button again.
Activate both heater circuits, verify amperage and voltage change.
Start the vehicle, go to measured value for particle filt.inlet temp.sens. 1 bank 1, raw value IDE: 07716. Sensor
must be at 150°C (run until this temp is met or exceeded)
9) Go to Guided Functions, Adap. value, SCR system.
10) Select Resetting adapt. values of reduction agent sys.,comp.change.
Note:
Test may take up to 2 minutes with vehicle running.
11) Select MV IDE: 11220 SCR current status and IDE: 10241 Reducing agent pump module relative press. calculated.
Note:
Vehicle must be running and MV particle filt.inlet temp.sens. 1 bank 1, raw value IDE: 07716 still at least 150°C.
12) When IDE: 11220 SCR current status goes to pressure control and IDE: 10241 Reducing agent pump module
relative press. calculated reads approximate 6 bar, system is operating to specification.
13) Road test vehicle to ensure AdBlue light goes out.
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Technical Tips
Additional Information
Revision History
Revision Number
Released Date
Reason For Update
2047070/1
3/3/17
Original publication.
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