Subaru Forester 2004 Service Manual page 94

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
5 CHECK HARNESS BETWEEN MASS AIR
FLOW AND INTAKE AIR TEMPERATURE
SENSOR AND ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance of harness
between mass air flow and intake air tempera-
ture sensor and engine ground.
Connector & terminal
(B3) No. 5 — Engine ground:
Check
Is the resistance less than 5
Ω?
EN(H4DOTC 2.5)-93
ENGINE (DIAGNOSTIC)
Yes
Replace the mass Repair the harness
air flow and intake and connector.
air temperature
NOTE:
sensor. <Ref. to
In this case repair
FU(H4DOTC 2.5)-
the following:
30, Mass Air Flow
• Open circuit in
and Intake Air
harness between
Temperature Sen-
mass air flow and
sor.>
intake air tempera-
ture sensor and
ECM connector
• Poor contact in
mass air flow and
intake air tempera-
ture sensor
• Poor contact in
ECM
• Poor contact in
joint connector
No