Troubleshooting my wiring

[formulamd]

Hello,
I have a weird ? when i go to measure ohms on pin 11 on the 14 way connector withthe computer completely disconnected to ground im getting 5kohms. The book says that it should open. And when i pull my map sensor connector off it jumbs to around 9k. This wire is a jumper from the 14 pin connector to the big 100 and someting pin connector. The car is a 89 t2 daytona. Im getting weird codes consisting of map and charging systems. I have replaced my map sensor and rerounted the vac lines and still get code 13, 41, 46, 47. but the car charged the bat. Is anyone else ever seen this before?

[NAJ]

First, your Map code 13 is Map Pneumatic Circuit Fault, you did everything except diagnoise properly.
Since you rerouted vacuum lines be sure they are correct to the Baro Solenoid,top port from manifold vacuum source, middle port Baro to Map, bottom port is a vent and remains open.
1) Connect a vacuum gauge to a manifold vacuum source,is engine vacuum reading 16-20"hg?
NO,Repair engine mechanical condition causing low enginge vacuum.
YES....
2) Tee a vacuum gauge into the vacuum line before the Baro Read Solenoid.
Is vacuum reading 16-20"hg?
NO, Repair cracked,broken, restricted,misrouted vacuum line to Baro Solenoid
YES....
3) Tee a vacuum gauge into the vacuum line between the Baro Solenoid and Map Sensor, is vacuum reading 16-20"hg.
NO, Replace the Baro Read Solenoid.
YES....
4) Using a Map Sensor response chart compare Map voltage output on the signal line to actual engine vacuum.
Charging System Faults
41, Alternator Field Control Circuit
46 Battery Voltage above Target Charging Voltage
You always start with the lowest code # so fix 41 then move on if the others are still Hard Faults.
The Controller controls the Alternator Field Circuit by grounding the DG/OR wire at Term #14 of the 60 pin connector,the DG/OR wire is a direct wire to Term # 11 of the 14 pin connector,when this wire is grounded by the controller the Field Circuit is controlled thru Term # 14 (DG)of the 14 pin connector to Alternator.This is done internally on the Power Board of the SMEC.
If the DG/OR wire is shorted to ground the Alternator is constantly charging causing your code 46 because it is Overcharging and the controller has no control of the circuit hence the code 41
With both controller connectors disconnected and checking with an ohmmeter to ground at term # 14 of the 60 pin and term # 11 of the 14 pin it should read open on both ends.If not the DG/OR wire is shorted to ground causing the Field circuit to be energized all the time.
Repair, open the harness and repair the DG/OR wire for short to ground.

[formulamd]

I was able to repair my charging circuit causing all the codes to go away except code 13. I bypassed all of the vac lines off and only put the Baro and map sensor and the fuel pressure reg on. I still get this darn code. Im wondering if my baro solonoid has a small crack or something.

[NAJ]

Vacuum at idle must be between 16-20" hg and must read the same before and after the Baro Solenoid.If vacuum is lower after the Baro Solenoid be sure all vacuum connections are tight and secure and if they are replace the Baro Solenoid. If vacuum is reading the same then you have to check to be sure the controller is seeing the correct voltage for the vacuum applied to the Map Sensor.

[formulamd]

I will try this thankyou

[formulamd]

Thanks for all your help with this project. Here is the situation 23 hg of vac is what we are getting at idle. What conditions setup pin 38 output (Baro sensor read solenoid output drive) because i get solid vacuume into the baro. I measured with a vac gauge solid holding vacume on the side going into the map. When i rest the computer i get a pulse on pin on 38 and then get nothing. If i pull the connector and apply 12v and ground to the baro solonoid and apply vac using a mity vac tool and it holds until i energize the coil. So therefore the solenoid is not leaking. I notice that the pin 38 from 2 smecs will pulse once or twice and then stay opened not pulled to ground (continuious vac to the map sensor) and there is no further action to the baro solnoid. What conditions drive pin 38? I also applied 5 hg and got 1.996v and for 20hg i got .65v. Telling me that the map sensor is within spec. Any help would be greatly appreciated. regards, Mike

[NAJ]

First, 23" hg at idle is almost impossible,I would check with another gauge.
You have to TEE the gauge into the line before and after the baro solenoid and read vacuum at idle.
Do not play with the controls of the baro solenoid,that is not going to tell you anything unless a baro code is set.The controller only uses this to update barometric pressure on turbo vehicles at steady throttle no load conditions.The controller blocks vacuum to the map sensor,uses the map to update baro info then bleeds off the blocked vacuum and allows vacuum to again be applied to the map sensor.
The first thing you need to do is clear all stored faults that may have been set and recheck to see if any hard faults(check engine light will be on)are still present.
99% of of the time you have a hard fault code 13 it is a vacuum related issue.
Also when you replaced your map sensor did you replace it with a turbo map?

[formulamd]

We will dig into it tomorrow. Thanks