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Can someone help me sort out these test points? 84 240gl 200 1984

uid 27's pic
posted by  Art Benstein on  Sun Jun 26 14:28 CST 2005
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last visit: Fri Oct 17 20:10 CST 2014
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Hi Kenneth,

Wild guess here, are you replacing your FI harness?

1) the blue/white is what you said, IAC test ground. The red (pink) is a test point used to adjust AMM pot for mixture. On the B23F (LH2.0) an analog meter is best used to view the rich/lean transitions.

2) White/red is generally used for ignition (coil switched side), although I can't recall that exact connector. You have a GL, maybe that continues the ignition signal to the tach, but I thought on mine it was the shielded gray wire that did that - to pin 1 on the ECU.

3) Orange is used for the on-idle switch of the TPS. The connector is there I think, to join with the ignition harness to provide TPS indication to the ignition computer mounted on the windshield washer bottle.

4)The connector you describe here is a starter access. Hit it with 12V and she cranks.

5) This one powers the heated oxygen sensor yours probably doesn't have. If you have a one-wire lambda sensor and that empty connector, you have a replacement harness, or a late 84 someone has fitted with the less expensive unheated sensor. It should just provide +12 switched and ground to the lambda sond's heater.
--
Art Benstein near Baltimore






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