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Creation: 01.31 - 2014

1-1-13

GPU - 406

GPU

409

running relay. Its function is to provide a 24V signal when the engine is running above 600 RPM.

This signal is used to power an analog engine hourmeter.

(9) Key Switch Power Relay – K10

K10 is the key switch power relay. This relay provides 24V power to all the components

connected to TB3 (switched +24V terminal block). It is only active after the GPU has turned on.

The engine control module (ECM) requires the 24V signal that this relay provides to allow the

engine to run.

(10) Low Fuel Relay – K5

K5 is the low fuel relay, and it is only present when the GPU has been optioned with a low fuel

warning beacon. This relay provides power to the low fuel warning beacon when the fuel level

has reached its low limit.

(11) J1939 Data Link Connector – P11

P11 is the Data Link Connector. Its purpose is to provide a way to communicate with the engine

control module (ECM) for diagnostic purposes.

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TLD GPU-409 Specifications

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