1999 Volvo XC-70 Replaced fuel pump car still doesn't run

pavendan · Post by **pavendan** » 12 May 2014, 17:13

CN90,

I got .4 Ohm (31 & 87) and almost no voltage between 31 and 31b

Patricio

Post by **cn90** » 13 May 2014, 07:29

pavendan wrote:CN90,

...almost no voltage between 31 and 31b

Patricio

Was key in position II during this test?

Post by **cn90** » 13 May 2014, 07:54

31 is ground.
31b is controlled by the ECU, and has voltage of 4.3V, when key is in position II.

When you turn the key to position II, 31b is fed with 4.3V by the ECU.
This closes the primary circuit (31 + 31b), activating the secondary circuit, which closes 15 and 87 ---> activating fuel pump.

I suspect the PRO part to be the problem. Bosch is OEM.

Post by **abscate** » 13 May 2014, 08:30

That 0.4 Ohm means with 12V applied, the pump should pull about 30 AMPS

Not good, and surprised the fuse doesn't go

pavendan · Post by **pavendan** » 13 May 2014, 19:09

Yes the key was in position II. Where can I order the Bosch pump for that price?

Patricio

Post by **cn90** » 13 May 2014, 20:00

Ebay has the Bosch fuel pump for $85 or so. Ask the seller to be sure it is Bosch OEM before buying it.

1999 Volvo XC-70 Replaced fuel pump car still doesn't run

Re: 1999 Volvo XC-70 Replaced fuel pump car still doesn't ru