5000CD Quattro Wagon (Canada) L5-2226cc 2.22L SOHC Turbo (MC) (1986)
Engine Control Module: Scan Tool Testing and Procedures
Output Signal Tests
Control unit output signals, checking
Fuel pump relay signal
Work sequence
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Pull fuel pump relay from relay panel, location number 10
-
Connect voltmeter between terminals 46 and 50, then terminals 48 and 50, with ignition switched ON
^
Specification: approx. 12 V
If specification NOT OK
Check for open circuit in wiring according to current flow diagram
-
Connect voltmeter between terminals 46 and 47
-
Briefly actuate starter
^
Specification: approx. 9.5 V
If specification OK
-
Replace fuel pump relay
If specification NOT OK
-
Check circuits as follows
-
Remove control unit cover located in footwell on passenger side of vehicle
-
Unplug control unit connector