External relay wiring diagram for P0410 code rectification

Relay terminal connections;

“85”, connected to vehicle earth/ground, cut & join via wire, “1” on relay module plug ( this has 4 numbered pins)

“86”, switching/energising power ECU supplied, by wire,”3”, that you splice into.

“30”, is a new, inline fused, (40amp) power supply from battery. See picture.

“87”, cut wire “4” and join to make new power supply to secondary air pump,


This bypasses the existing relay for the air pump in the relay block. Diode protected relay is best practice to prevent possible back EMF from relay to ECU.



New relay sitting above fuse box , view from LHS. Note our vehicles are RHD.

New relay tucked in to fuse box looking from LHS of vehicle, note 40amp inline fuse