Passat L4-1984cc 2.0L DOHC (1991)
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press Q button to enter input
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press --> key
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press 0 and 8 buttons to select function "read measurement block"
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press Q button to enter input
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display will appear as shown
Read measuring value block
HELP
Input display group number X
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press 0 button twice to select "Display group 00"
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0 display will appear as shown
Read measurement block
Q
Input display group number 00
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press Q button to enter input
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display will appear as shown
Read measurement block
-->
1
2
3
4
5
6
7
8
9
10
Continue with testing if the value displayed in channel 1 is less than 63 which corresponds to a coolant temperature of at least 80°C (176°F)
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read OXS signal value in channel 6
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display must fluctuate
If YES
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press --> button.
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press 0 and 6 button to select function "end output"
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press Q button to enter input
If display does NOT fluctuate
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disconnect OXS sensor (4-pin) and OXS heater harness connectors
- mounted on right engine mount (arrow)
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touch violet wire from control unit (arrow) to ground for approx. 20 seconds using jumper wires from VW 1594 adaptor kit
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value displayed in channel 6 must increase
If YES
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replace OXS sensor (G 39)
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read and then erase Fault memory
If display value does not increase