FixVault

Diagnostic Method

Detect a malfunction by measuring the rear oxygen sensor response time after fuel cut.

G13596728Courtesy of SUBARU OF AMERICA, INC.
(A) 0.55 V
(B) 0.5 V
(C) 0.3 V
(D) 0.25 V
(E) 0 V
(F) Diagnostic parameter
(G) Normal
(H) Malfunction

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Output voltage value of rear oxygen sensor Less than 0.5V
Elapsed time More than 1500 ms

Time needed for diagnosis:  Less than 1 s

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.