Sr20det MAF problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

boycelaforest707 · 09-30-2008, 11:27 AM

Freshly installed SR20DET problems with MAF...
Check the wiring from MAF to ecu, wires are correctly wired to pins 16,17 on ecu and wires are good.

Here is the problem:
I get NEGATIVE .6 VOLTS key on engine off from middle ground (black) to signal wire (white). If I unplug signal wire (PIN 16 from ECU) then I get 0 volts.

My middle ground on maf connector and ECU does not go to CHASSIS ground.

My question:
What would cause this? Bad ECU? Some ECU ground?
Also should these pins go to chassis ground somewhere or is there a seperate ECU ground?
13-GROUND
29- SENSOR GROUND
39 ECCS GROUND
48 ECCS GROUND

09-30-2008, 11:27 AM	#1
boycelaforest707 Leaky Injector Join Date: Aug 2005 Location: Eureka, CA Posts: 106 Trader Rating: (0) Feedback Score: 0 reviews	Sr20det MAF problem Freshly installed SR20DET problems with MAF... Check the wiring from MAF to ecu, wires are correctly wired to pins 16,17 on ecu and wires are good. Here is the problem: I get NEGATIVE .6 VOLTS key on engine off from middle ground (black) to signal wire (white). If I unplug signal wire (PIN 16 from ECU) then I get 0 volts. My middle ground on maf connector and ECU does not go to CHASSIS ground. My question: What would cause this? Bad ECU? Some ECU ground? Also should these pins go to chassis ground somewhere or is there a seperate ECU ground? 13-GROUND 29- SENSOR GROUND 39 ECCS GROUND 48 ECCS GROUND __________________ 1991 240sx Hatchback 5spd