With Manufacturer's Scan Tool
Clutch Vacuum Vent Valve Switch - F36-, Checking
Clutch Vacuum Vent Valve Switch -F36- informs the ECM when the clutch is being engaged or disengaged. This prevents the engine from jerking when disengaging and engaging. It also prevents the engine from racing during disengagement operations when the Cruise Control System is switched ON.
Special tools
- VAG 1551/1552 Scan Tool using VAG 1551/3 Adapter cable
- VAG 1598/22 Test Box (MY 1999)
- VAG 1598/31 Test Box (from MY 2000)
- Fluke 83 multimeter
- VW 1594 Adapter kit
- Wiring diagram
Test sequence
- Connect VAG 1551/1552 Scan Tool.
- Switch ON ignition but do not start engine.
- Press 0 and 1 buttons to select Address word 01: "Engine electronics"
Display will appear as shown (example only)
038906018M 1.9l R4 EDC 00AG 1813 ->
Coding 0001 WSC XXXXX
- Press -> button.
Display will appear as shown
Rapid data transfer HELP
Select function XX
- Press 0 and 8 buttons to select Function 08: "Read measuring value block".
- Press Q button to enter input.
Display will appear as shown
Read measuring value block HELP
Input Display group number XXX
- Press buttons 0, 0 and 6 to select "Display group 6".
- Observe value in Display zone 2.
Read measuring value block 6 0 km/h 0 0 0 000000 255
Specification: 0 0 0
- Operate clutch pedal.
- Left-hand position value must change to 1.
Read measuring value block 6 0 km/h 1 0 0 000000 255
Specification: 1 0 0
If specifications not obtained
- Press -> button.
Display will appear as shown
Rapid data transfer HELP
Select function XX
- Press 0 and 6 buttons to select Function 06: "End output".
- Press Q button to enter input.
- Switch OFF ignition.
- Disconnect Clutch Vacuum Vent Valve Switch -F36- harness connector.
- Switch Fluke 83 multimeter to resistance range.
- Measure resistance at switch terminals.
Specification:
- Clutch not depressed: maximum 10 Ohms
- Clutch depressed: infinity Ohms
If specifications not obtained
- Replace Clutch Vacuum Vent Valve Switch -F36-.
- Display the Readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If DTC memory has been erased
- Set the Readiness code again. Monitors, Trips, Drive Cycles and Readiness Codes
If specifications obtained
- Connect VAG 1598/22 (or 1598/31) Test Box to ECM wiring harness.
- Check wiring for open circuit between Test Box and harness connector using Wiring diagram.
Up to MY 1999
- Terminal 1 + socket 2
- Terminal 1 + socket 28
- Terminal 2 + socket 46
From MY 2000
- Terminal 1 + socket 1
- Terminal 1 + socket 2
- Terminal 2 + socket 66
Wire resistance: 1.5 Ohms maximum
- Check wires for shorting to: one another, Ground and Battery +
Specification: Infinity Ohms
If wiring OK
- Replace Engine Control Module -J248-
- Display the Readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If DTC memory was erased
- Set the Readiness code. Monitors, Trips, Drive Cycles and Readiness Codes