Corrective Action
WARNING: This page is about a different car, the 2002 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.
Visually inspect diagnosis sensor unit wiring harness and connections. Replace harness if damaged and recheck system. If fault still exists, replace diagnosis sensor unit. If fault still exits, replace related harness. When repairs are complete, go to FINAL CHECK under DIAGNOSTICS.