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Read measured value block 95
1 2 3 4
- Check display values for intake manifold change-over.
Display zones
1
2
3
4
Display Group 95: Intake manifold change-over at idling speed
Display
xxx rpm
x.xx ms
xxx.x ° C
IMC-V OFF
Indicates
Engine speed
(in steps of 40 rpm)
Load
Coolant temperature Intake manifold change-over
Range
min.: 550 rpm
max.: 6800 rpm
min.: 0.00 ms
max.: 100.00 ms
IMC-V OFF
Stage 1
Specification
650...750 rpm
12.0... 26.0 ms
80.0...105.0 ° C
IMC-V OFF
Note
- Check readout in display zone 4.
Specification: IMC-V OFF
- Increase engine speed to about 4700 rpm (display zone 1) and observe readout in display zone 4.
- The intake manifold change-over function should be activated (display zone 4).
Display zones
1
2
3
4
Display Group 95: Intake manifold change-over with vehicle being driven
Display
xxxx rpm
x.xx ms
xxx.x ° C
Stage 1
Indicates
Engine speed
(in steps of 40 rpm)
Load
Coolant temperature Intake manifold change-over
Range
min.: 550 rpm
max.: 6800 rpm
min.: 0.00 ms
max.: 120.00 ms
IMC-V OFF
Stage 1
Specification
4500...6800 rpm
16.0...120.00 ms
80.0...105.0 ° C
Stage 1
Note
- If the display shows "Stage 1" but the vacuum unit for the intake manifold change-over is not activated (fitting
location: on front left of intake manifold):
- Test intake manifold change-over valve
- Check vacuum system for leaks
3.3 - Testing intake manifold change-over valve -N156
.
Testing intake manifold change-over valve -N156
- Run engine at idling speed for 2 or 3 minutes to build up vacuum.
- Switch engine off.
- Switch ignition on.
-> Perform final control diagnosis and activate intake manifold change-over valve
Audi A8 1994 ➤
Motronic injection and ignition system (6-cylinder) - Edition 02.1999
64
24 - Mixture preparation, Injection