Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 273

EN(H4DOTC)(diag)-316

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

Step

Check

Yes

CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE ASSEMBLY
RH CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from the ECM
and tumble generator valve assembly RH.
3) Measure the resistance of harness between
ECM connector and tumble generator valve
assembly RH connector.

Connector & terminal

(B134) No. 25 — (E55) No. 5:
(B134) No. 26 — (E55) No. 4:

Is the resistance less than 1 Ω? Go to step

Repair the harness
and connector.
NOTE:

In this case, repair
the following item:
• Open circuit in
harness between
ECM

connector

and  tumble  gener-
ator  valve  assem-
bly RH connector
• Poor  contact  of
coupling connector

CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE ASSEMBLY
RH CONNECTOR.
Measure the resistance between ECM connec-
tor and chassis ground.

Connector & terminal

(B134) No. 25 — Chassis ground:
(B134) No. 26 — Chassis ground:

Is the resistance 1 MΩ or
more?

Go to step

Repair the short
circuit to ground in
harness between
ECM connector
and tumble gener-
ator valve assem-
bly RH connector.

CHECK FOR POOR CONTACT.
Check for poor contact of tumble generator
valve assembly RH connector.

Is there poor contact of the tum-
ble generator valve assembly
RH connector?

Repair the poor
contact of tumble
generator valve
assembly RH con-
nector.

Replace the tum-
ble generator valve
assembly RH.
<Ref. to FU(STI)-
48, Tumble Gener-
ator Valve Assem-
bly.> <Ref. to
FU(w/o STI)-48,
Tumble Generator
Valve Assembly.>

EN(H4DOTC)(diag)-317

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

DV:DTC P2009 INTAKE MANIFOLD RUNNER CONTROL CIRCUIT LOW

(BANK 1)

DTC DETECTING CONDITION:

• Immediately at fault recognition

• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-222, DTC P2009 INTAKE MANIFOLD RUNNER CON-

TROL CIRCUIT LOW (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-63,

OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-49, PROCE-

DURE, Inspection Mode.>.

WIRING DIAGRAM:

• Engine electrical system, without SI-DRIVE <Ref. to WI-32, WITHOUT SI-DRIVE, WIRING DIAGRAM,

Engine Electrical System.>

• Engine electrical system, with SI-DRIVE <Ref. to WI-48, WITH SI-DRIVE, WIRING DIAGRAM, Engine

Electrical System.>

ECM

B21

A25

D11

A26

A23

A19

D10

A29

A24

1 2 3

4 5

E51

E55

B134

B137

E55

E51

22 23

11 12 13 14 15

24 25

16 17

18 19 20 21

28 29

30 31

B137

22 23

11 12 13 14 15

26 27

16 17

18 19 20 21

33 34

30 31

B134

B21

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 31 32 33

34 35
42 43

36 37 38 39

48 49 50 51 52 53 54

40 41

44 45

46 47

EN-09253

TUMBLE GENERATOR

VALVE ACTUATOR LH

TUMBLE GENERATOR

VALVE ACTUATOR RH

EN(H4DOTC)(diag)-318

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

Step

Check

Yes

CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE ASSEMBLY
RH CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the voltage between ECM connec-
tor and chassis ground.

Connector & terminal

(B134) No. 25 (+) — Chassis ground (–):
(B134) No. 26 (+) — Chassis ground (–):

Is the voltage 5 V or more?

Repair the short
circuit to power in
harness between
ECM connector
and tumble gener-
ator valve assem-
bly RH connector.

Replace the tum-
ble generator valve
assembly RH.
<Ref. to FU(STI)-
48, Tumble Gener-
ator Valve Assem-
bly.> <Ref. to
FU(w/o STI)-48,
Tumble Generator
Valve Assembly.>