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    Thread: Bentley ECU Motronic electrical test results

    1. 04-11-2011 08:40 AM #1
      I ran these test and there were some pins not on the connector so I could not do the test (38&55). I had a problem w/ my some grounds, knock sensors and my injectors. So w/ 55 missing I could not do the ecm power supply relay, fuel pump relay, 1 of the grounds and none of the ignition coil wiring. Now onto my #'s.
      Main Grounds: (all should be approx. battery voltage) 96 VR Jetta 5spd
      pin 10 & 54, .026v
      pin 33 & 54, .28v
      pin 55 & 54 I couldnt check b/c there was no 55

      Fuel injector coil resistance: (all should be between 14-21.5 ohms.)
      FI1 pin 23 & 24, 223.2 ohms
      FI2 pin 3 & 23, 223 ohms
      FI3 pin 23 & 26, 223 ohms
      FI4 pin 4 & 23, 221 ohms
      FI5 pin 23 & 25, 222 ohms
      FI6 pin 2 & 23, 221 ohms

      Throttle pos. sensor:
      pin 33 & 41, OL
      pin 33 & 40, OL
      pin 40 & 41, 814 ohms

      Knock sensor 1: (max 1.5 ohms)
      pin 33 and 34, 4.87 mOhms
      pin 34 & 56, OL

      Engine speed sensor: (500-700 ohms)
      pin 67 & 68, 852 ohms

      Heres a few of the major issues I have w/ wiring. I need help b/c this ground issue is where I think my problem lays and theres all common grounding points all pointing to the "ground connection (control module) and (end stage) in Motronic Multiport Fuel Injection (MFI) wiring harness". Thanx for your help in advance.

    2. Member expated's Avatar
      Join Date
      Oct 9th, 2007
      Location
      West Chester, PA
      Posts
      125
      Vehicles
      96 Jetta VR6, 87 16V GTI, 2001 A6 2.7 Quattro and 96 Ford Ranger XLT
      05-06-2012 09:38 PM #2
      Quote Originally Posted by TorqueU View Post
      I ran these test and there were some pins not on the connector so I could not do the test (38&55). I had a problem w/ my some grounds, knock sensors and my injectors. So w/ 55 missing I could not do the ecm power supply relay, fuel pump relay, 1 of the grounds and none of the ignition coil wiring. Now onto my #'s.
      Main Grounds: (all should be approx. battery voltage) 96 VR Jetta 5spd
      pin 10 & 54, .026v
      pin 33 & 54, .28v
      pin 55 & 54 I couldnt check b/c there was no 55

      Fuel injector coil resistance: (all should be between 14-21.5 ohms.)
      FI1 pin 23 & 24, 223.2 ohms
      FI2 pin 3 & 23, 223 ohms
      FI3 pin 23 & 26, 223 ohms
      FI4 pin 4 & 23, 221 ohms
      FI5 pin 23 & 25, 222 ohms
      FI6 pin 2 & 23, 221 ohms

      Throttle pos. sensor:
      pin 33 & 41, OL
      pin 33 & 40, OL
      pin 40 & 41, 814 ohms

      Knock sensor 1: (max 1.5 ohms)
      pin 33 and 34, 4.87 mOhms
      pin 34 & 56, OL

      Engine speed sensor: (500-700 ohms)
      pin 67 & 68, 852 ohms

      Heres a few of the major issues I have w/ wiring. I need help b/c this ground issue is where I think my problem lays and theres all common grounding points all pointing to the "ground connection (control module) and (end stage) in Motronic Multiport Fuel Injection (MFI) wiring harness". Thanx for your help in advance.
      Were you able to figure out this issue ever?

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