Wiring questions
09-30-2005, 11:16 PM
#1
Racer
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Wiring questions
I am in the finial stages of finishing my car from a cat fire, and I have 2 unused 3 pin AMP connectors. One is near the central electrics panel and when traced indicates it is for the co2 sensor and the other is in the engine valley and when traced indicates it is used for coding. The car is a 87 S4 AT and my question is do these connect to something or are they unused? Any help is appreciated.
TIA, Terry
TIA, Terry
10-01-2005, 08:23 AM
#2
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The one near the cetral electrics is for the idle mixture pot, non cat cars. No connection required if you are running closed loop with an O2 sensor.
One in the valley will be either for the idle stabliser valve or one of the knock sensors ?
Regards
John
One in the valley will be either for the idle stabliser valve or one of the knock sensors ?
Regards
John
10-01-2005, 11:17 AM
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John, thanks for the confirmation on the connector near the electrics panel. I have traced and connected the 2 knock sensors, the RPM sensor as well as the TPS but I still have one left over. When I trace this connector it goes to pin #10 on the 35 pin on the EZK connector--coding, any thoughts?
Thanks, Terry
Thanks, Terry
10-01-2005, 12:09 PM
#4
Electron Wrangler
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Terry,
The EZK connection on Pin 10 is onc of the coding inputs (selects mappings etc based on engine type/country/emissions/trans etc) the other coding inputs are pins 27/28 some pins on the LH (28/29/19) are also used to select the coding. Seems likely the coding plug shoud be on that other end - it doesn't connect to anything but the end shorts the pins in a specific configuration - see the WD's for details. Porsche does this so a single harness can configure for all cars. You could just short the appropriate connections @ LH/EZK - & save sourcing connectors etc... the WD's for 87 doesn't show the coding - the 88 ones do (assume the same - most things are 87-88) . Assume you want "M249 catalyzer" => Connect gnd to LH-19, LH-29, EZK-10
Rich can tell you lots more...
Alan
The EZK connection on Pin 10 is onc of the coding inputs (selects mappings etc based on engine type/country/emissions/trans etc) the other coding inputs are pins 27/28 some pins on the LH (28/29/19) are also used to select the coding. Seems likely the coding plug shoud be on that other end - it doesn't connect to anything but the end shorts the pins in a specific configuration - see the WD's for details. Porsche does this so a single harness can configure for all cars. You could just short the appropriate connections @ LH/EZK - & save sourcing connectors etc... the WD's for 87 doesn't show the coding - the 88 ones do (assume the same - most things are 87-88) . Assume you want "M249 catalyzer" => Connect gnd to LH-19, LH-29, EZK-10
Rich can tell you lots more...
Alan
10-01-2005, 06:35 PM
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Alan, thanks for the imput. Since this morning I have discovered that the replacement engine harness that I had purchased is not the same as the harnes that was in the car. The connector in question on the original harness traces to pin #5 which indicates it is the TPS connector. What I have done is to repair the original harness and will reinstall it in the car. That way I will know that all of the pins and connectors will agree.
