Subaru IMPREZA 2004 Service Manual page 768

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
G: DTC 26 INTAKE AIR TEMPERATURE SENSOR
• DIAGNOSIS:
• The intake air temperature sensor signal is abnormal.
• The harness connector between ECM and intake air temperature sensor is open or shorted.
• TROUBLE SYMPTOM:
• Hard to start
• Erroneous idling
• Poor driving performance
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory and inspection modes. <Ref. to
EN(H4SOw/oOBD)(diag)-28, OPERATION, Clear Memory Mode.> and <Ref. to EN(H4SOw/oOBD)(di-
ag)-26, OPERATION, Inspection Mode.>
• WIRING DIAGRAM:
LHD
7
3
B83
LHD
INTAKE AIR
TEMPERATURE
AND
MANIFOLD
ABSOLUTE
PRESSURE
SENSOR
E20
E2
B21 E20
RHD
RHD
B136 ECM
EN(H4SOw/oOBD)(diag)-72
: WITH IMMOBILIZER
WI
OI : WITHOUT IMMOBILIZER
OI
3
2
B83
OI
E20
1 2 3 4
LHD:
B83
1 2 3 4
5 6 7 8
RHD: B83
1 2 3 4 5 6
B21
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
17 18 19 20
B136
1 2 3 4 5 6 7
8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
EN-02584