Clutch Vacuum Vent Valve Switch Signal, Checking
Checking Signal From Clutch Vacuum Vent Valve Switch
Recommended special tools and equipment
- VAG 1526 multimeter or VAG 1715 multimeter
- VAG 1594 connector test kit
- Wiring diagram
Test requirements
- The respective fuse of Clutch Vacuum Vent Valve Switch -F36- must be OK.
- Battery voltage must be at least 11.5 volts.
- All electrical consumers such as, for example, lights and rear window defroster must be switched off.
- Parking brake must be engaged or else daylight driving lights will be switched on.
- If vehicle is equipped with an A/C system, it must be switched off.
- Ground (GND) connections between engine and chassis must be OK.
- Ignition switched off.
Test sequence
- Remove driver-side storage compartment.
- Disconnect 2-pin connector from Clutch Vacuum Vent Valve Switch -F36-.
- Measure resistance between terminals 1 + 2 of switch.
Specified value:
- Clutch pedal not depressed: max. 1.5 Ohms
- Clutch pedal depressed:Infinite Ohms
If specified values are not obtained:
- Replace Clutch Vacuum Vent Valve Switch -F36-.
NOTE: Note installation position of clutch vacuum vent valve switch in the upper installation bore of mounting bracket.
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If specified values are obtained:
- Connect test box to control module wiring harness, connect test box for wiring test. Test Box, Connecting For Wiring Test
- Check wire between test box and 2-pin connector for open circuit according to wiring diagram:
- Vehicles with engine code AEG Terminal 1+socket 48 Wire resistance: max. 1.5 Ohms
- Vehicles with engine code AVH, AZG, BDC Terminal 2+socket 39 Wire resistance: max. 1.5 Ohms
Continuation for all vehicles
- Also check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specified value: Infinite Ohms
If no malfunctions are detected in the wires and the resistance values are OK:
- Replace Motronic Engine Control Module (ECM) -J220-.