Lambda control (DWELL) - on/off fault codes for KE JETRONIC 3.1 control unit.

The control unit displays faults currently present via the on/off ratio .
The on/off fault codes are listed below:

On/off fault codes with ignition on:
0% Unused
10% Idle speed contact at throttle switch not opening
20% Full load contact at throttle switch not opening
30% Coolant temperature below 70°C
40% Air flow sensor potentiometer malfunction
50% All input signals are OK. No faults
60% Vehicle speed limitation signal active
70% Start signal active
80% Selector lever in “DRIVE“ position
90% Electro-hydraulic actuator current implausible
100% Unused

On/off fault codes with engine running:
0% Control unit receives no voltage or is defective
10% Air flow sensor defective or polarity reversed.
20% Full load contact defective or incorrectly connected.
30% Short or open circuit between coolant temperature sensor and
control unit or the temperature sensor is defective.
40% Short or open circuit between air flow sensor and
control unit or the air flow sensor is defective.
50% Oxygen sensor not at operating temperature, open circuit or defective.
60% Vehicle speed signal to the control unit implausible
70% Control unit receives no RPM signal.
80% Interrupted data exchange between ECU and
ignition control unit (EZL).
90% Current at electro-hydraulic actuator out of range.
95% Deceleration fuel shut-off active.
Values Oscillates: All signals are OK. No fault in monitored
signals.