It's reading the same resistance in both directions, it's a SMD type so without any info to go by (schismatics) is it going to have any writings or markings on it?

 

IF it is in circuit then it may not give a high/low resistance with a multimeter. That test is only definitive when the diode is disconnected.

More details of the circuit, pictures and description of the readings and how you made them would help us help you.