Output Checks

TO BE PERFORMED SEQUENTIALLY STARTING WITH:
DIFFERENTIAL PRESSURE REGULATOR CHECK (CODE 4341)





- connect multimeter US 1119 to differential pressure regulator harness using adaptor VW 1315 A/1
- set meter to 200mA scale





- insert spare fuse in top of fuel pump relay
- turn ignition ON, remove fuse after four seconds

(Differential pressure regulator, check)

^ fault indicator light will display 4341
- close full throttle switch
^ differential pressure regulator current switches to 10mA (should be approximately 100mA with full throttle switch in open position)

If approximately 10mA is NOT obtained
- check differential pressure regulator

CARBON CANISTER SHUTOFF SOLENOID, CHECK (CODE 4343)

- re-insert spare fuse in top of fuel pump relay for four seconds, then remove
- fault indicator light will display 4343
- close full throttle switch
^ shutoff solenoid clicks on and off when full throttle switch is closed

IDLE STABILIZER VALVE, CHECK (CODE 4431)

- re-insert spare fuse in top of fuel pump relay for four seconds, then remove
- fault indicator light will display 4431
- close full throttle switch
^ idle stabilizer valve must cycle when full throttle switch is closed

COLD START VALVE, CHECK (CODE 4443)
- re-insert spare fuse in top of fuel pump relay for four seconds, then remove
- fault indicator light will display 4443
- close full throttle switch
^ cold start valve clicks on and off for a maximum of 10 seconds when full throttle switch is closed

NOTE: If a problem is found in any of these components, first check the component for continuity using US 1119 multimeter.