 D-Jetronic Fuel Pump Circuit Troubleshooting, Flow Charts |
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| pbanders |
 Oct 22 2016, 10:42 PM
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Senior Member  Group: Members Posts: 990 Joined: 11-June 03 From: Scottsdale, AZ Member No.: 805 Region Association: Southwest Region  |
These charts used to be available on my page but the javascript has been broken for years. Here are the individual charts, you start with the first one and branch to the other charts as needed. I'll come up with a new way to put them on my page so that they're accessible there.
Note that these charts were intended to help diagnose problems where the fuel pump isn't running at all. If your fuel pump runs for 1.5 sec after key on, but doesn't run after starting, you likely have a fault in your trigger contact (TC) points, the ECU, or the ECU wiring harness connections to the TC's. Note that the DMM should be set to DC voltage, and either in auto-range or on the manual 20V range. In the flow charts where it says "ground", that's the same as reading 0V on the DMM. I used "ground" and "0V" interchangeably, sorry for any confusion. Here's a diagram of the relay board so that you know what relays and connections are being referred to. This view is from the top side.  |
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| pbanders |
Oct 22 2016, 10:52 PM
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Senior Member Group: Members Posts: 990 Joined: 11-June 03 From: Scottsdale, AZ Member No.: 805 Region Association: Southwest Region |
End Fault Area Diagnostics:
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Posts in this topic
pbanders D-Jetronic Fuel Pump Circuit Troubleshooting Oct 22 2016, 10:42 PM
pbanders Start here, when you reach a red oval, go to the c... Oct 22 2016, 10:44 PM
Spoke
Start here, when you reach a red oval, go to the ... Oct 23 2016, 07:55 AM pbanders
On the next box, "Remove relay 74 turn key o... Oct 23 2016, 12:50 PM pbanders Pwr to Relay Board:
Oct 22 2016, 10:45 PM pbanders ECU Pwr-Gnd Conn:
Oct 22 2016, 10:47 PM pbanders From previous flow chart, "Circuit is OK, lea... Oct 22 2016, 10:50 PM pbanders FP Pwr and ECU Control:
Oct 22 2016, 10:51 PM pbanders Spoke, will check all of your comments, I haven... Oct 23 2016, 08:43 AM Tom_T Thanx for posting these Brad!
:beer2:
Tom
//... Oct 23 2016, 12:10 PM draganc Thanks for an excellent job done! Oct 23 2016, 12:12 PM thomasotten Excellent flow charts. One thing to note, it appe... Dec 1 2024, 03:37 PM ClayPerrine You can always use this relay board diagram.
http... Dec 1 2024, 05:03 PM |
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