Passat Wagon V6-2792cc 2.8L DOHC (1994)
Technical Service Bulletin # 919307
Date: 931220
Multi-Function Indicator - Troubleshooting
Group: 91
Number: 93-07
Date: December 20, 1993
Subject:
Multi-Function Indicator (MFA), Troubleshooting (Supercedes Technical Bulletin 91-93-05, 6/30/93)
Model(s):
Passat
From 1993 m.y.
The troubleshooting information is formatted to the new VW worldwide style.
File this information in your Technical Bulletin binder.
Operation and Function
The Multi-function indicator is an integral part of the instrument cluster and consists of an electronic processor unit and a digital display unit. Electrical
signals from external components (sensors and control modules) are fed into the electronic unit, processed and stored. The results can be shown as
figures in the display. The Mode Select Switch (E 86) and the Memory Switch (E 109) are located in the wiper switch lever.
The following signals are processed by the Multi-function indicator
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Pulse from Speedometer Vehicle Speed Sensor (VSS) (G 22)
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Resistance change from Oil Temperature Sensor (G 8)
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Resistance change from Outside Air Temperature Sensor (G 17)
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Fuel consumption signal from engine control module
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Pulse from terminal TD/terminal 1
When the ignition is off, the MFA display shows time. When ignition is switched on, the time remains in the display until the Multi-function Indicator
Mode Select Switch (E 86) is pressed. When the Mode Select Switch (E 86) has been operated, the selected MFA function and the stored data appear. If
the Mode Select Switch (E 86) is pressed briefly and repeatedly, different functions appear one after the other.
Sequence of functions:
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Time (in hours and minutes)
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Driving time (max. 100 hours)
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Average fuel consumption (liters/100 km or miles/gallon) At speeds below 8 km/hr or 8 mph the average consumption display switches to liters/hour
or gallons/hour.
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Distance driven (max. 10,000 km or 10,000 miles)
-
Average speed (in km/h or mph)
-
Engine oil temperature (in degrees Celsius or Fahrenheit) At temperatures below 122 ~F (50~C) dashes appear.
-
Outside (ambient) temperature (in degrees Celsius or Fahrenheit)
When ignition is on, the sensor values for driving time, distance driven and fuel consumption are recorded continuously and stored. The calculation of
the average speed and the average fuel consumption only takes place when the function is called up.
Driving Data Memory
The Multi-function indicator contains two selectable memories:
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Memory 1: Single trip memory
-
Memory 2: Total trip memory
The data in these memories can be displayed using the Mode Select Switch (E 86).
The two memories collect all driving data as long as the ignition is on. Both memories can be cancelled manually, see page 3 "Cancelling the memories".
If the capacity in one memory is exceeded, all data in this memory wall be cancelled. Memory 1 (single trip memory) YAII automatically be cancelled
when ignition is switched on if the ignition has been off continuously for longer than 120 minutes.
Mode/Memory Select Switch Test Position
Multi-function Indicator Mode Select Switch (E 86) and Memory Switch (E 109)
Position 1 of Multifunction indicator memory switch (E 109)
In position 1 the contents of the single trip memory can be displayed. With ignition on, and until the ignition is switched off, the following data is
