DIY Secondary Air Pump Simulator. 2 Bank all 6 cylinder BMW
Secondary Air Pump Parts Needed (All Purchased @ Radio Shack):
1 - Component PC board (#276-149 $1.99)
1 - Component Project Enclosure (#270-1802 $2.69)
2 - SPDT * PC relay miniature 12vdc 10V (#275-248 $9.38)
1 – 5V Voltage regulator (# 276-1770 $1.59)
2 - 100K – ohm Micro Potentiometer (#271-284 $2.98)
Tools Needed:
Soldering pen 7 watts or higher
Solder
Wire
Digital volt meter
Place both relay, potentiometers and regulator on board as shown in picture. Solder all pins on back side of board. Go to wiring diagram and make connections. When finished test unit by hooking to 12 volts and set potentiometers with a screwdriver to 200mv from pin DME wire to ground. Potentiometers should be between 45,000 and 50,000 ohms if you want to ohm it out. Questions to
jsmith50@tampabay.rr.com ***This is for off road use only***
***I accept no responsibility for items burned out or damaged by mis-use of this devise. The DME & O2 are sensitive devises and can be destroyed by sending the wrong voltage to the units***