HKS: Accessories: OSC

Oxygen Signal Computer

HKS - Oxygen Signal Computer HKS OSC Angle View HKS OSC (Oxygen Signal Computer) is "required" for F-CON iS piggyback setup if you need as-good-as-possible sub-3000 RPM / low-throttle air-fuel-ratio (AFR).

From a technical point of view, it is to cancel OEM wideband closed-loop fuel trim, and to act as a wideband controller using existing OEM sensor for the HKS ECU. It can be said that it is a version of the AFK but without knock detection, and with pseudo fixed 14.5:1 AFR signal to the OEM ECU.


It should be used in conjunction with F-CON iS for the following vehicles:
• Nissan Stagea VQ25DET
• Nissan Skyline R35
• Nissan 350Z / 370Z
• Subaru Legacy BP / BL
• Subaru Forrester SG5 AT / SG9
• Suzuki Swift

Photos

HKS OSC Set - 01 HKS OSC Set - 02 HKS OSC Set - 03
HKS OSC PCB HKS OSC Harness HKS OSC OBD-ii Cable

Diagram: OSC

HKS OSC wiring diagram

Diagram: OBD-ii

HKS OBD-ii diagram