Rev counter signal

Rev counter signal

The injection control unit sends the engine speed signal to the instrument panel in the form of voltage intervals.

Heater plugs warning light

Normal operation of the warning light:

• warning light comes on during the pre-heating stage
• warning light goes out at the end of the pre-heating

Engine coolant temperature pre-alarm warning light

The coolant temperature pre-alarm warning light can be operated by one of the following components:

• injection control unit
• coolant temperature sensor (3-way)

Normal operation of the warning light:

• the warning light comes on if the temperature exceeds 118°C
• the warning light goes out if the temperature goes below 117°C
• the warning light flashes if there is a fault in the engine coolant temperature sensor electrical line.