Danny_Mitch
Probationary Member
- 4
- 0
- Oct 31, 2020
-
Modesto,
California
Once I plug in the MAP sensor, voltage from pin 81 on the ECU will drop from 4.97v to 4.30v and the MAF and TPS will read that same voltage since they are also connected to pin 81.
If I leave the MAP sensor unplugged, the TPS and MAF will get 4.97v from the harness. This affects the TPS a lot because when the map is plugged in the TPS voltage can't go higher than 78%, but if the MAP is unplugged it will reach 98% at fully open.
I've checked the splices for the sensor grounds that come from pin 92 and they're in perfect condition.
I've been dealing with this for too long and can't seem to find an answer. The only thing i can think about doing next is locating the splice from pin 81 that goes to MAF, TPS, and MAP sensors in order to determine the issue.
Any suggestion on how to diagnose this would be much appreciated. The car is basically stock aside from a 16g turbo, FMIC, wideband and DSMlink v3.
If I leave the MAP sensor unplugged, the TPS and MAF will get 4.97v from the harness. This affects the TPS a lot because when the map is plugged in the TPS voltage can't go higher than 78%, but if the MAP is unplugged it will reach 98% at fully open.
I've checked the splices for the sensor grounds that come from pin 92 and they're in perfect condition.
I've been dealing with this for too long and can't seem to find an answer. The only thing i can think about doing next is locating the splice from pin 81 that goes to MAF, TPS, and MAP sensors in order to determine the issue.
Any suggestion on how to diagnose this would be much appreciated. The car is basically stock aside from a 16g turbo, FMIC, wideband and DSMlink v3.
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