Subaru 2002 IMPREZA Service Manual page 1463

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
• RHD model
E21
1 2 3
Step
1 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODE (DTC) ON DISPLAY.
NOTE:
In this case, it is not necessary to inspect DTC
P1146.
2 CHECK AIR INTAKE SYSTEM.
THROTTLE BODY
PRESSURE SENSOR
3
1
B83
B135
B83
1 2 3 4 5 6
Is any other DTC displayed?
Are there holes, loose bolts or
disconnection of hose on air
intake system?
EN(TURBO)-303
E21
E2
B21
ECM
B21
1 2
1 2 3 4
10 11 12 13 14 15
5 6 7 8
20 21
9 10 11 12
13 14 15 16
17 18 19 20
Check
Inspect the rele-
vant DTC using
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(TURBO)-75,
List of Diagnostic
Trouble Code
(DTC).>
Repair the air
intake system.
ENGINE (DIAGNOSTICS)
B135
4 5 6 7 8 9
3
16 17 18 19
22 23 24 25 26 27 28
Yes No
Go to step 2.
Go to step 3.
EN0968