Volkswagen Passat 1995 Official Factory Repair Manual page 1553

Diagnostic mode, selecting
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Diagnostic mode 8: Tank leak test
Note:
This diagnostic mode can only be selected with
Module number 10 - Engine Electronics.
Function
This diagnostic mode checks the fuel system for
leaks.
Note:
Evaporative Emission (EVAP) Canister Purge
Regulator Valve -N80- seals the fuel supply
system.
Using engine leak detection spray (e.g.: G 001
800 A1) leaks can be detected.
Test requirements
There must not be any DTCs stored in DTC
memory Page ST-22
Check DTC memory.
Coolant temperature must be 80 to 110 C
Page ST-15 , Diagnostic mode 1: Check
measured values; PID 05, Coolant
temperature.
Intake air temperature must not be above the
maximum of 60 C
Diagnostic mode 1: Check measuring
values; PID 15, Intake air temperature.
Page 33 of 35
, Diagnostic mode 3:
Page ST-15 ,
6/12/2004
ST-46