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Wiring - DSMLink

steve

DSM Wiseman
14,447
1,390
Feb 3, 2002
St. Charles, Illinois
Connector B53 - Pin 19: Volume Airflow Sensor Reset - Is this needed? Purpose?
Connector B53 - Pin 17: Boost Meter - Is this a for the factory dash or?
Connector B53 - Pin 11: Turbo Wastegate Solenoid - Using a mac valve, Does polarity matter?
Connector B53 - Pin 3: Fuel Pressure Solenoid - Is this for fuel pressure sensor from the FPR?OBD2 Signal. I am going to be running this straight off the ECU - for OBD2 Data / Functionality with DSMLink, Is this the only 4 wires I need going to the OBD2 connector?Pin 1 Diagnostic line to ECU (connector B-55, pin 56)
Pin 5 Ground
Pin 7 Data line to ECU (connector B-55, pin 62)
Pin 16 +12v unswitched power

Pin 3 is a output from the ECU to drive the factory fuel pressure solenoid. It's used to raise the fuel pressure on warm starts by connecting the FPR manifold reference to atmospheric pressure instead of vacuum. Low side. There isn't a fuel pressure sensor.

Pin 11 is a PWM output from the ECU to drive the factory boost control solenoid. Low side. It shouldn't matter which pin on the Mac valve this goes to but like the rest of the low side outputs it only sinks current.

Pin 17 is a PWM output from the ECU to drive the factory boost gauge. Low side.

Pin 19 is used by the ECU to reset the MAF circuitry at times when the airflow is interrupted. If your running Speed Density it's not needed. Low side.

OBD2 connector both pins 4 and 5 are grounds. Technically pin 5 is the signal ground where pin 4 is the power ground but the factory wiring connects both to the same point.
 
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