Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E70) Forum
User Name
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management

LinkBack Thread Tools Display Modes
Old 03-24-2019, 05:29 PM
Join Date: Aug 2016
Location: Brooklyn, NYC, NY
Posts: 345
robnitro is on a distinguished road
X5 35d code 4670 Power Supply 1 - Short Circuit to B+

X5 35d code 4670 Power Supply 1 - Short Circuit to B+

I had this code three times so far. One was on a very cold dry day 5mins after startup, One was on a wet day 1 min after startup and today on a dry day after being fully warned up. It's odd and clears after I stop to check codes because of the limp mode that comes and goes.

The first time when it was cold it persisted longer and during that period I had other codes that came and went, for rail pressure or map sensor or fuel low pressure sensor. Those are all listed for under power supply 1 and probably a result of the 4670 code which seems to cut things to protect a short etc.

Voltage is stable throughout the issue 14.5v today for example and the battery is 2 months old agm. Never had this issue before and it being intermittent not related to rain confuses me.

I intend to check the test plan with ista/Rheingold when I am home tonight.
Reply With Quote

Sponsored Links

Old 03-24-2019, 11:02 PM
Join Date: Aug 2016
Location: Brooklyn, NYC, NY
Posts: 345
robnitro is on a distinguished road
I looked at the dde plugs to reseat them earlier and nothing. No wire damage found.

I checked with ISTA an hour after parking.
Codes still there. Dash and Idrive complaining low power- engine issue. Occasional glitching (that 4670 "retries" the connection since it knocks out sensors it "thinks" are shorted). Only other code was 493F which is for pre-supply pressure (past filter- before inj pump).

I ran the test for the pre-supply pressure and it came up fine, temp and pressure ok.
3.9 bar and around 40 C.

The diag steps for the 4670 code just lists sensors on that power supply 1 'bus'.
Sensor group 1:
-accelerator pedal module sensor
-rail pressure sensor
-charging pressure sensor (MAP)
-exhaust backpressure sensor
-fuel pressure and temperature sensor (pre-supply not the high pressure one)
-brake vacuum sensor
-throttle valve sensor

I could find all except for the vaccum sensor and the fuel pressure sensor.
Anyway, I cleared the codes (which didn't want to clear with carly an hour before when I was driving home) and it went away and ran fine. Just odd....

Edit: Found the fuel pressure sensor here- its part of this hard line:
It's behind the inj pump and stuffed in that valley next to the oil filter. I have to dig there and check connections.

WHERE is the fuel low pressure sensor????
I'd like to check that sensor but I followed the lines and don't see it anywhere on the fuel lines in/out. On the diagram for code 493F, it is after the fuel filter and before the inlet of the injection high pressure pump.

Last edited by robnitro; 03-24-2019 at 11:19 PM.
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 09:50 AM.
vBulletin, Copyright 2020, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.