Subaru FORESTER 2001 Service Manual page 129

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Engine (Diagnostics)
No.
5 CHECK HARNESS BETWEEN MASS AIR
FLOW AND INTAKE AIR TEMPERATURE
SENSOR AND ECM CONNECTOR.
1) Turn ignition switch to OFF.
2) Measure resistance of harness between
mass air flow and intake air temperature sen-
sor and engine ground.
Connector & terminal
(B3) No. 5 — Engine ground:
Step
Is the resistance less than
5 Ω?
EN(DOHC TURBO)-128
Check Yes
Replace mass air
flow and intake air
temperature sen-
sor. <Ref. to
FU(DOHC
TURBO)-34, Mass
Air Flow and
Intake Air Tem-
perature Sensor.>
No
Repair harness
and connector.
NOTE:
In this case,
repair the follow-
ing:
¼ Open circuit in
harness between
mass air flow and
intake air tem-
perature sensor
and ECM connec-
tor
¼ Poor contact in
mass air flow and
intake air tem-
perature sensor
¼ Poor contact in
ECM
¼ Poor contact in
joint connector