Volkswagen CJDA Workshop Manual page 459

Note
Only gold-plated contacts may be used when repairing the con-
tacts in the connectors of the exhaust gas temperature sender
3.
– Connect vehicle diagnostic tester, and select engine control
⇒ P age 23
unit.
– Select diagnosis function "011-Read measured value block".
Engine must be idling.
– Select "Display group 99".
Indicated on display:
Note
The display zones may be shown one below the other or next to
each other on the display of the vehicle diagnostic tester.
– Increase engine speed to 2400...2800 rpm.
– Check exhaust gas temperature value from exhaust gas
temperature sender 1 -G235- in display zone 2. The temper-
ature value must increase evenly and continuously.
– Keep engine speed at 2400...2800 rpm for approx. 3 mi-
nutes.
– With the engine speed being increased, select "Display
group 100".
Note
Make a note of temperature value in display zone 2.
Indicated on display:
– Check exhaust gas temperature value from exhaust gas
temperature sender 3 -G495- (exhaust gas temperature
sender ahead of diesel particulate filter) in display zone 1
and from exhaust gas temperature sender 4 -G648- (ex-
haust gas temperature sensor downstream from diesel par-
ticulate filter) in display zone 2.
Note
◆ The exhaust gas temperature value in display zone 2 of dis-
play group 99 must be higher than the exhaust gas tempera-
ture values in display zones 1 and 2 of display group 100.
◆ In addition, the exhaust gas temperature value in display
zone 1 of display group 100 must be higher than the exhaust
gas temperature value in display zone 2 of display group
100.
– If the value in display zone 2 of display group 100 is higher
than the value in display field 1, the two senders have been
interchanged.
– If the values in display zones 1 and 2 of display group 100
are not plausible, check exhaust gas temperature sender 3
-G495- (exhaust gas temperature sender ahead of diesel
particulate filter) and wiring to sender as follows:
Workshop Manual for Diesel Engine (2.0 l/36-75 kW_EA 189) 05.2015
Industriemotoren - Industrial Engines 2009 ▶
Display group 99
880 rpm 114.0°C
Display group 100
xxx°C xxx°C
3 Checking components and functions
3
xxx.x°C xxx.x°C
xxx mbar xxx mbar
443