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Are we sure it's pin 13 and 5? 700 1986

posted by TJAM2K3 on Wed Jan 28 07:34 CST 2004
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I have a 1986 740 GLE. My problem is with testing the ECT at the LH Jetronic unit. I read in the FAQ's that I should test my values at pin 13 and 5 of the connector. 13 on my unit is a thick gray wire that goes to the grounding side of my injectors. My ECT wiring goes through the firewall on the driver's side and then into the control module by the brake pedal. I assume it goes from there to the LH but Im not sure which wires carry it there.

My question is simple. Is someone POSITIVE that I should be checking 13 and 5. If not, which pins should I use?

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Are we sure it's pin 13 and 5? 700 1986

posted by lucid on Wed Jan 28 17:04 CST 2004
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last visit: Fri Nov 20 20:06 CST 2009

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On the 240 LH 2.2 the ECT is measured from pin 2 to ground, per the Bentley manual and my own notes. Nominal resistance ar 68�F is 2,280�2,720 ohms.

The LH 2.4 and 3.1 use pin 13 and ground/pin 5.
--
Bruce Young,
'93 940-NA (current), '80 GLE V8 (Sold), '86 240dl, '85 244 ti, '83 245t
'76 244 (R.I.P at 255k), 73 142 (98K), '71 144 (ex circle track car)
Used '70 144 from '78 to '92, New 144 from '67 to '78, Used '62 122 from '63 to '67

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Are we sure it's pin 13 and 5? 700 1986

posted by mgarageu on Wed Jan 28 13:01 CST 2004
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last visit: Sun Mar 9 08:34 CST 2008

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ECU with 35-pin connector, yes. voltage between pin 13 and earth (which is pin 5)
--
i prefer non-german cars

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Are we sure it's pin 13 and 5? 700 1986

posted by someone claiming to be Steve on Wed Jan 28 09:27 CST 2004 [RELATED]

You can only confirm this by looking at a wiring diagram for LH2.2.

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