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Volvo Penta Engine Control System Installation

Oct. 18, 2019

Location of Sensors

Engine TAD550GE

Volvo Penta TAD550GE engine.jpg

Volvo TAD550GE engine.jpg

1 Coolant level sensor, in expansion tank

2 Charge air temp and pressure sensor

3 Air filter indicator

4 Crank sensor (RPM)

5 Fuse

6 Oil pressure sensor

7 Water in fuel sensor

8 Fuel pressure sensor, (low press)

9 Fuel pressure sensor, (high press)

10 Coolant temperature sensor

11 Camshaft position sensor

 Engine TAD750/751GE

Volvo TAD750GE.jpg

Volvo TAD751GE.jpg

Control System Installation

Connection, General

• The installation must be prepared for well and carried out with the greatest care.

• Secure the connecting cable between the engine and instrument panel with clamps. Bear in mind that connector blocks must be mechanically secured so that they are not exposed to any pulling forces.

• The cables must not be run close by hot engine components or close to any other heat source. Ensure that the cables are protected from mechanical wear, sharp edges and water splashes. If necessary, the cables can be run through conduits.

• As far as possible, avoid splices in the system wir-ing. The cables and any splices must be accessible for inspection and service.

NOTICE! Connectors must be assembled “dry”, they must not be filled with petroleum jelly or similar.

Power supply

NOTICE! The engines are equipped with 2-pole elec-trical systems. This means that the battery negative cable must be connected to the engine block or the flywheel housing.

The battery positive cable may be run via a main switch to terminal 30 on the starter motor.

The battery negative cable must be connected to the engine block or the flywheel housing, close to the starter motor. Refer to the illustration below.

power supply.jpg

Battery specification

Max. battery 2x220 Ah (series connected), 1150 A CCA EN.

Battery charging

Standard for all engines is that batteries are supplied with power from the alternator

Battery cable cross-sectional area

The total length (L) of the positive and negative cables determines cable cross sectional area (A).

Max L









Min A











Due to fire risk, the cable area should never be less than 70 mm2 (0.1 inch2).


A 8-pin Deutsch connector, from wire harness to engine

B Connectors, analog instruments E 8-pin Deutsch connector

C 3-pin Deutsch connector, Easy Link instrument

D For the connection cable, refer to the Instru-ments page 51 section.

F Extension cables, available in the following lengths: 3, 5, 7, 9, and 11 m

Start lock (system voltage OFF / ON)

Engine system voltage start current (control unit) is 10 A. Ensure that other components in the installation are dimensioned for this current load.

Start switch

Switch type: closing (NO), spring loaded.

Stop switch

Switch type: closing (NO), spring loaded.

The stop switch is energized during operations via a parameter setting. In this case use a normally closed (NC) switch.

start lock.jpg

RPM potentiometer

Nominal revolutions minus 120 rpm: 0.3–1.9 V (preset value 1.17 V)

Nominal revolutions plus 120 rpm: 1.9–4.7 V (preset value 4.5 V)


1500/1800 rpm switch

Two-position contact.

This function allows a frequency change from 50 to 60 Hz.

Idle switch

Two-position contact.

Closed contact provides idle rpm.

Droop value switch

Two-position contact.

The switch must be closed to provide rpm droop value.

Primary control switch

Two-position contact.

Contact, pre-heating

Two-position contact.


A 8-pin connector from the engine wire harness.

B 3-pin Deutsch connector, Easy Link instrument

C Connectors, analog instruments (options)


DCU (Display Control Unit)

The DCU is connected via the 8-pin databus connector block.

Display (optional)

Switch type: closing (NO), spring loaded.

Stop switch (optional)

Switch type: closing (NO), spring loaded.

Warning and control lamps (options)

Running indication:

Max. power 3 W

Voltage 24 V


Easy Link Instrument (option)

Refer to the System Information page 33 for the engine concerned.

For parallel connection of up to 20 extra VDO instru-ments.

The instruments will automatically find their own parameter group from the databus. Maximum Easy Link cable length is 3 m.

The following instruments are available:

• Tachometer/operating hours

• Coolant temperature

• Oil pressure

• Oil temperature

• Battery voltage


Instrument, analog (option)

Refer to the System Information page 33 for the engine concerned.


Use Volvo Penta standard tachometer, graduations 0– 2600 rpm.

Setting code 14. Refer to installation instructions.

Oil pressure gauge

Use Volvo Penta oil pressure gauge, graduations 0– 10 bar (0–145 psi).

Oil temperature gauge

Use Volvo Penta oil temperature gauge, graduations 40–150 °C (104–302 °F).

Coolant temperature gauge

Use Volvo Penta oil temperature gauge, graduations 40–150 °C (105–300 °F).

Diagnostics switch

Switch type: closing (NO), spring loaded. For reading fault codes, refer to the Calibration and Settings page 72 chapter.

Contact, pre-heater

Switch type: closing (NO), spring loaded. This contact activates the pre-heating.

oil pressure gauge.jpg

Synchronizing Engine Speed

Synchronization/load distribution

The system is adapted for GAC synchronization and load distribution. Use the EAM122 interface module when connecting to this system. When this system is used, voltage levels must be adjusted simultaneously with VODIA, according to the below.

NOTICE! The EAM122 interface module is not sold by Volvo Penta. Contact a GAC (Governors of America Corporation) dealership.

engine speed.jpg

A Rpm control (GN/NO)

B Rpm control (GN/SB)

C Contact to (R/BL 1.5)

nominal revolution.jpg

A Nominal revolutions +120 rpm

B Nominal revolutions (1500/1800 rpm)

C Nominal revolutions –120 rpm

The above Volvo Penta engine control system installation is only suitable to Volvo industrial engine for the genset. If you want to know about Volvo power generation, welcome to contact us.

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