Test-ID 05: Tank ventilation system

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2005 Volkswagen GTI, 2004 Volkswagen R32, 2004 Volkswagen Jetta, 2004 Volkswagen GTI, and 2003 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

Test requirements

There must not be any DTCs stored in DTC memory. Refer to Diagnostic mode 3: Check DTC Memory
Coolant temperature must be at least 80 ° C. Refer to Diagnostic mode 1: Check measured values

Work procedure

Read readiness code. Refer to Readiness code, reading
Let engine run at idle.
Under address word 33, select "Diagnostic mode 6: Check test results of components that are not continuously monitored".
Select the "Test-ID 05: Tank ventilation system".

Check specified values at idle.

Evaluation test-ID 05: Tank ventilation system

Tank ventilation system	Specified value:
Evaporative Emission (EVAP) canister purge regulator valve(s)	min.	max.
Passive test (can only check OK)
Engine code AFP	0.148	---
Engine code BDF	0.148	---
Engine code BJS	0.148	---
Active test: Deviation of oxygen sensor control in direction "lean" (can only check OK), short test
Engine code AFP	0.060	---
Engine code BDF	0.070	---
Engine code BJS	0.070	---

Tank ventilation system	Specified value:
Evaporative Emission (EVAP) canister purge regulator valve(s)	min.	max.
Active test: Deviation of oxygen sensor control in direction "rich" (can only check OK), short test
Engine code AFP	-0.060	---
Engine code BDF	-0.070	---
Engine code BJS	-0.070	---
Active test: Air balance at idle OK, also short test
Engine code AFP	25%	---
Engine code BDF	25%	---
Engine code BJS	35%	---
Active test: Air balance at idle not OK, also short test
Engine code AFP	25%	---
Engine code BDF	25%	---
Engine code BJS	35%	---

Tank ventilation system	Specified value:
Tank seal	min.	max.
Large/small leak
Engine code AFP	1.9	---
Engine code BDF	1.6 to 1.7	---
Engine code BJS	1.6 to 1.7	---
Reed contact does not close
Engine code AFP	---	0.5
Engine code BDF	---	0.5
Engine code BJS	---	0.5
Reed contact does not open
Engine code AFP	---	30.0
Engine code BDF	---	30.0
Engine code BJS	---	30.0

Tank ventilation system	Specified value:
Tank seal	min.	max.
Tank ventilation system not OK during initial flush
Engine code AFP	0.0	---
Engine code BDF	0.0	---
Engine code BJS	25.0	---
Pinhole leak
Engine code AFP	5.8	---
Engine code BDF	5.8	---
Engine code BJS	7.5	---

End diagnosis and switch ignition off.

If specified values are not obtained:

EVAP canister system, checking for proper seal. Refer to Evaporative Emission (EVAP) canister system, checking for proper seal .
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80-. Refer to Evaporative Emission (EVAP) canister purge regulator valve 1, checking .
Leak Detection Pump (LDP) -V144-, checking. Refer to Leak Detection Pump (LDP), checking .

Vehicles with engine code BJS

Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve -N115-. Refer to Evaporative Emission (EVAP) canister purge solenoid valve 2 (vehicles with engine code BJS), checking .

Continuation for all vehicles

Erase DTC memory of Engine Control Module (ECM). Refer to Diagnostic mode 4: Reset/erase diagnostic data
Generate readiness code. Refer to Readiness code, generating