Entering Self-Diagnostics

"U-CHECK", "Read Memory" and "D-CHECK" are entered by connecting and/or disconnecting the read memory and test mode connectors as required. See Fig 1. See RELATIONSHIP BETWEEN MODES AND CONNECTORS table.

Fig 1: Location Of O2 Monitor, Read Memory & Test Mode Connectors

Courtesy of SUBARU OF AMERICA, INC.

RELATIONSHIP BETWEEN MODES & CONNECTORS

Mode	Read Memory Connector	Test Mode Connector
U-CHECK	Disconnect	Disconnect
Read Memory	Connect	Disconnect
D-CHECK	Disconnect	Connect
Clear Memory	Connect	Connect