Wiring For MAF Conversion on

E34 535i BMW using PSC1-004

5/15/02

DME

PSC1-004

ARM1

GRAY/YELLOW (7)

BLACK (6)

DME WIRING HARNESS

WHIT

E

GRAY/RED

GRAY/RED
AT ASH TRAY
SWITCHES TO
+12V WHEN
DASH LIGHTS
ARE ON

GR
A

Y

VI

OL
ET

GREEN

BLACK

BL
A

C

K

BLACK

RED

RED

RED

BLACK

BROWN

GREEN

ORANGE

ORANGE

TO SWITCHED +12V

POWER DME pin 37

TO SIGNAL GROUND

GREY/BLUE

DME pin 26

RED

BL
A

C

K

MAF

SENSOR

TO OXYGEN

SENSOR

ORANGE

MAF C

O

NV
ERS

ION
 WIRING HA

RNESS

BUTT SPLICE CONNECTOR

IN-LINE CONNECTOR

INSTANT SPLICE CONNECTOR

RING CRIMP CONNECTOR

BL
A

C

K

RED/BLUE

THROUGH
FIREWALL

*

*

*

NOTE:  IN-LINE CONNECTORS
MUST BE DISCONNECTED IF THE
STOCK AIR FLOW METER IS 
RECONNECTED

AIR TEMP SENSOR
Option:  Use IAT1
Instead of the PSC1
GRAY wire

GRAY/VIOLET (44)

GRAY/BLUE (26)

Y

E

LLO

W/
BLA

C

K

( ) Indicates DME pin number

To DME

Pin 28

(shielded)

BROWN

To OXYGEN
SENSOR
GREY WIRE
DME pin 10