· Engine
speed greater than 2000 rpm
· Control
unit reference voltage for knock sensor lower than 10 mV. The value
varies depending on the engine speed
· Knock
sensor voltage is evaluated and indicates an implausible value for
20 consecutive checks (at 100 ms intervals)
Replacement values:
· If
the engine load signal is greater than 2.6 ms (X 25 XE) or
1.8 ms (X 30 XE) and the coolant temperature is higher
than 45 °C / 13 °F, the control unit retards the firing angle
by up to 12 °CA for reasons of safety
The value varies depending on
the engine speed.
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