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Conditions for Checking
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Nominal Value
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Affected terminals: B10, B12, B13
Possible trouble codes: 93
Important:
This actuator test is used for precise diagnosis (fault
isolation) for when trouble code 93 is stored.
Ignition ON
Engine OFF
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Press key F5 in the system main menu, select the desired test
using the arrow keys and confirm with YES. Follow the instructions in the
TECH 1 display.
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TEST OKAY!
Engine telltale flashes
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Note:
The check is completed after approx. 2 s.
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If the TECH 1 display on the right appears, a control unit
malfunction has been determined.
If, however, more than one circuits have been recognised as the
defect, the output end stage (quad driver) of the control unit may be
damaged.
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TEST
FAILED!
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The following faults can be recognised with this actuator test:
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Engine speed signal for tachometer and AT
Short circuit to ground
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TN
SIGNAL
OUTPUT
VOLTAGE
LOW
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Short circuit to battery voltage
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TN
SIGNAL
OUTPUT
VOLTAGE
HIGH
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Fuel consumption signal for MID
Short circuit to ground
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TRIP COMPUTER
VOLTAGE
LOW
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Short circuit to battery voltage
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TRIP COMPUTER
VOLTAGE HIGH
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Engine telltale switched to ground
Short circuit to ground or circuit interruption
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CHECK
LIGHT
VOLTAGE
LOW
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Short circuit to battery voltage
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CHECK
LIGHT
VOLTAGE
HIGH
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