Subaru 2002 IMPREZA Service Manual page 521

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Check Yes
Is the voltage less than 5V?
Replace the tum-
ble generator valve
assembly. <Ref. to
FU(D0HC
TURBO)-40, Tum-
ble Generator
Valve Assembly.>
Step
1
CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE ACTUATOR
CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from tumble gen-
erator valve connector.
3)Measure the voltage between tumble gener-
ator valve actuator and chassis ground.
Connector & terminal
(€51)
No.
1 (+)
-
Chassis ground (-):
(E51)
No. 2 (+)
-
Chassis ground (-):
No
Repair battery
short circuit
between ECM and
tumble generator
valve actuator.
Step Check
1
CHECK ANY OTHER DTC ON DISPLAY.
Does the Subaru Select Moni-
tor or OBD-ll general scan tool
indicate DTC P11 l o ?
CH:DTC PI110
-
ATMOSPHERIC PRESSURE SENSOR CIRCUIT LOW INPUT
Yes
Replace the ECM.
<Ref. to FU(D0HC
Engine Control
Module.>
NOTE:
Atmospheric pres-
sure sensor is buili
into ECM.
TURBO)-47,
DTC DETECTING CONDITION:
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(D0HC TURBO)-
49, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(D0HC TURBO)-46, Inspec-
Two consecutive driving cycles with fault
Step Check
1
CHECK ANY OTHER DTC ON DISPLAY.
Does the Subaru Select Moni-
tor or OBD-II general scan tool
indicate DTC P1 1 1 l ?
Yes No
Replace the ECM. It is not necessary
<Ref. to FU(D0HC to inspect DTC
Engine Control
Module.>
NOTE:
Atmospheric pres-
sure sensor is built
into ECM.
TURBO)-47, P1111.
No
It is not necessary
to inspect DTC
P1110.
CI: DTC P I 11 1
-
ATMOSPHERIC PRESSURE SENSOR CIRCUIT HIGH INPUT
DTC DETECTING CONDITION:
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(D0HC TURBO)-
49, OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(D0HC TURBO)-46, Inspec-
tion Mode.>.
Two consecutive driving cycles with fault
EN( DOHC TU RB0)-297