Output Circuit Check Low

1994 PCED OBDI-A

SECTION 18A: Diesel Diagnosis — 7.3L DI Engine

AD: Output Circuit Check Low

DTC 548 indicates that the output circuit check is low.

Possible causes:

Does the system have low voltage?

Yes	No
RECHARGE battery. GO to AD2.	REPLACE PCM.

Is the DTC 548 still present?

Yes	No
GO to Pinpoint Test B. After Test B is completed, GO to AD3.	System OK. Test complete.

Is DTC 548 present?

Yes	No
REPLACE PCM.	System OK. Test complete.