Reference Modification no.
- 0 -
Page
120
Date
1997 02 01
Main
914 F
01477
12.4.14)Constant lighting of the red boost lamp of the TCU
Lighting up of the red boost lamp signals an exceeding of the target pressure
in the airbox.
Depending on duration of time limit exceeding, increased wear by thermal
overstressing of cylinder, valves and spark plugs has to be considered.
The following checks are necessary:
Exceeding the limit up to 1 min:
Inspect engine and especially turbo charger and air intake system.
➪ check wiring. See chapter 12.3.16).
If not physical damage can be detected, check the TCU. Consult chapter
13.6).
No direct checks are necessary as long as no further operating limits are
exceeded.
â– ATTENTION: If further limits of operation were exceeded or fell short of
conduct the additional relevant checks.
â–² WARNING: Do not start engine before trouble is found and rectified.
Exceeding the limit longer than 1 minute:
Examination of pistons, cylinders, valves and cylinder heads is necessary.
â– ATTENTION: If further limits of operation were exceeded or fell short of
conduct the additional relevant checks.
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