SEAT Workshop Service and Repair Manuals

Hall sender -G40- checking

Special tools and workshop equipment required

t	Hand multimeter -V.A.G 1526 A- or multimeter -V.A.G 1715-

t	auxiliary measuring set -V.A.G 1594 A- or -V.A.G 1594 C-

t	Test box -V.A.G 1598/22-

t	Current flow diagram

Checking conditions l  Battery voltage at least 11.5 V. l  All electrical consumers, e.g. lights and rear window heating must be switched off. l  If the vehicle is equipped with an air conditioner/heating system, this must be switched off. l  Hall sender, screwed on tight. Test sequence

–  Pull 3-pin connector off Hall sender -arrow-.

–  Measure the supply voltage with the multimeter and the auxiliary cables of -V.A.G 1594 A- or -V.A.G 1594 C- between:

Connector, contact	Connector, contact
1 (positive)	3 (earth)
Switch ignition on
Specification: 4.5 V min.

–  Switch ignition off. If no voltage is present:

–  Connect test box -V.A.G 1598/22- to control unit wiring harness.

–  Check wiring between test box and 3-pin connector for open circuit using current flow diagram.

Connector, contact	Test box -V.A.G 1598/22-, socket
1 (positive)	62
2 (signal)	60
3 (earth)	54
Specification: 1.5 Ω max.

–  Additionally check wires for short to one another.    Specification: ∞ Ω If no wiring fault is detected and voltage was present between contacts 1 + 3: –  Replace Hall sender -G40- → Item. If no wiring fault is detected and no voltage was present between contacts 1+3:: –  Renew engine control unit → Item.