Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 277
EN(H4DOTC)(diag)-332
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK CURRENT DATA.
1) Start the engine.
2) Read the value of «TGV Position Sensor L»
using the Subaru Select Monitor.
NOTE:
Is the value of «TGV Position
Sensor L» less than 0.2 V?
Even if DTC is
detected, the cir-
cuit has returned to
a normal condition
at this time. Repro-
duce the failure,
and then perform
the diagnosis
again.
NOTE:
In this case, tem-
porary poor con-
tact of connector,
temporary open or
short circuit of har-
ness may be the
cause.
2
CHECK POWER SUPPLY OF TUMBLE GEN-
ERATOR VALVE ASSEMBLY LH.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from tumble gen-
erator valve assembly LH.
3) Turn the ignition switch to ON.
4) Measure the voltage between tumble gen-
erator valve assembly LH connector and engine
ground.
Connector & terminal
(E51) No. 3 (+) — Engine ground (–):
Is the voltage 4.5 V or more?
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 LH connector
• Poor contact of
ECM connector
• Poor contact of
coupling connector
3
CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE ASSEMBLY
LH CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the resistance of harness between
ECM connector and tumble generator valve
assembly LH connector.
Connector & terminal
(B137) No. 10 — (E51) No. 1:
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 LH connector
• Poor contact of
coupling connector
4
CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE ASSEMBLY
LH CONNECTOR.
Measure the resistance between ECM connec-
tor and chassis ground.
Connector & terminal
(B137) No. 10 — Chassis ground:
Is the resistance 1 MΩ or
more?
Repair the short
circuit to ground in
harness between
ECM connector
and tumble gener-
ator valve assem-
bly LH connector.
EN(H4DOTC)(diag)-333
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
5
CHECK FOR POOR CONTACT.
Check for poor contact of ECM and tumble gen-
erator valve assembly LH connector.
Is there poor contact of ECM or
the tumble generator valve
assembly LH connector?
Repair the poor
contact of ECM or
tumble generator
valve assembly LH
connector.
Step
Check
Yes
No
EN(H4DOTC)(diag)-334
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
EB:DTC P2022 TUMBLE GENERATED VALVE POSITION SENSOR 2 CIRCUIT
HIGH
DTC DETECTING CONDITION:
• Immediately at fault recognition
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-232, DTC P2022 TUMBLE GENERATED VALVE PO-
SITION SENSOR 2 CIRCUIT HIGH, Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
• Improper idling
• Engine stalls.
• Poor driving performance
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-
EN(H4DOTC)(diag)-335
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
WIRING DIAGRAM:
• Engine electrical system, without SI-DRIVE <Ref. to WI-32, WITHOUT SI-DRIVE, WIRING DIAGRAM,
• Engine electrical system, with SI-DRIVE <Ref. to WI-48, WITH SI-DRIVE, WIRING DIAGRAM, Engine
ECM
E2
B21
A25
D11
A26
A23
A19
D10
A29
A24
1 2 3
4 5
E51
E55
B134
A:
B137
D:
8
16
19
29
2
8
27
6
30
4
2
1
3
5
E55
4
2
1
3
5
E51
5
6
7
8
2
1
9
4
3
10
22 23
11 12 13 14 15
24 25
26
16 17
18 19 20 21
27
28 29
30 31
B137
D:
5
6
7
8
2
1
9
4
3
10
24
22 23
25
11 12 13 14 15
26 27
28
16 17
18 19 20 21
33 34
29
32
30 31
B134
A:
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
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