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Relay unit, radiator fans (706c), Z19DTH AUT

Relay unit, radiator fans (706c), Z19DTH AUT

Location

Relay unit, radiator fans (706c)

Main task

To control the radiator fans.

Type


Relay unit containing relays and resistors and thermal fuse.

Connection

Pin No. Signal type Description
3 +30 Supplied with power from fuse holder 748.
6 +30 Supplied with power from fuse holder 748.
2 Ground Grounded in grounding point G2.
7 Ground Grounded in grounding point G2.
4, 5 and 8 Control signal. 0 V = active. Grounded by the ECM. The pins are grounded differently depending on current fan stage, see below.




Current values

Stage Pin 8 Pin 5 Pin 4
1 grounded
2 grounded
3 grounded grounded
4 grounded grounded grounded


In stage 1 the fan motors are connected in series and are supplied via pin 7.


Power supply


Control