Page 36 of 65
20-161
Checking input wiring (vehicles with
electronic throttle control)
- Switch ignition off.
- Connect test box VAG1598/31 to harness connector Page 20
-156
,
"Check output wiring."
Repair Manual, Fuel Injection & Ignition, Repair Group 24 - Check the following wire connections for open circuit or short circuit to
Ground or plus (B+): Electrical connector terminal
Test box VAG1598/31 socket
1 80
- Repair open or short circuit as necessary.
- Generate readiness code:
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Page 37 of 65
20-162
Leak Detection Pump (LDP) -V144,
removing and installing
Checking LDP Page 20
-139
Removing
- Remove left rear wheel.
- Remove left rear wheel housing liner.
Repair Manual, Body Exterior, Repair Group
66
- Cut tie wrap -1- and remove hose -2- .
- Disconnect hose coupling -3- after pressing tab.
- Remove nuts -arrows-.
- Switch off ignition.
- Remove LDP, unclip and disconnect connector.
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Page 56 of 65
20-176
EVAP system leak detection circuit,
schematic diagram (vehicles with 1.8 ltr.
turbo engine)
Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel
Injection & Ignition, Repair Group 24 1 -
Check valve
Location (light/dark side): as shown in
illustration
2 -
EVAP canister purge regulator valve -N80-Location: in engine compartmentChecking
3 -
Bleed line
From EVAP canister purge regulator valve
-N80-
LocationRight side under floor panFront-wheel drive: on floor pan in area of
fuel tank All-wheel drive: on fuel tank in area of fuel
tank
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Page 60 of 65
20-180
EVAP system leak detection circuit,
schematic diagram (vehicles with 2.8 ltr.
engine)
Repair Manual, 2.8 Liter V6 5V Fuel Injection &
Ignition, Repair Group 24 1 -
Throttle actuator control module -J338-
2 -
EVAP canister purge regulator valve -N80-Location: in engine compartmentChecking:
3 -
Bleed line
From EVAP canister to EVAP canister
purge regulator valve -N80-
LocationOn right side under floor panVehicles with front-wheel drive: mounted
on floor pan in area of fuel tank Vehicles with all-wheel drive: mounted on
fuel tank
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Page 63 of 65
20-183
EVAP system leak detection circuit,
schematic diagram (vehicles with 2.7 ltr.
turbo engine)
Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel
Injection & Ignition, Engine Code(s): APB, Repair Group 24
1 -
To air intake before both turbo chargers
2 -
Check valve Installation position: Arrow at housing
indicates flow-through direction.
3 -
Evaporative Emission (EVAP) canister
purge regulator valve -N80- Location: On right side of engine
compartment Checking:
4 -
Vent line
From EVAP canister to EVAP canister
purge valve regulator valve -N80 Installation position: On right side on
vehicle under-side. Attached to fuel tank.
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