Fault diagnosis, temperature gauge (MIU 1)
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Fault diagnosis, temperature gauge (MIU 1)
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Fault symptoms
Temperature gauge constantly indicates low temperature L. Diagnostic trouble code
B1311 may be present in ICE. Radiator fan may start when ignition switched on.
Diagnostic procedure
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1.
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Check whether any diagnostic trouble codes are
present in the ICE module. If there are, take the necessary steps.
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2.
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If no diagnostic trouble codes are present in the ICE module, continue fault
diagnosis as described in Service Manual 3:5 "Electrical system, ICE". If no faults are
discovered when carrying out the diagnostic procedure described, continue with point 3.
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3.
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Check the conductive foil on the rear of the main instrument display panel for an
open circuit between pin 9 (14p) and the screw marked "T-SIG" on the main instrument
display panel. If the conductive foil is intact and the temperature gauge does not work, the
fault is probably in the gauge. The complete main instrument display panel will have to be
changed. If there is an open circuit in the conductive foil, change the foil.
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