SUBARU FORESTER 2004 Service Repair Manual

EN(H4DOTC)-258
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
6 CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE POSITION
SENSOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from throttle
position sensor.
3) Turn the ignition switch to ON.
4) Measure the voltage between throttle posi-
tion sensor connector and engine ground.
Connector & terminal
(E54) No. 1 (+) — Engine ground (
−):Is the voltage more than 4.5 V? Go to step 7.Repair the har-
ness and connec-
tor.
N
OTE:
In this case repair
the following:
 Open circuit in
harness between
tumble generator
valve position sen-
sor and ECM con-
nector
 Poor contact in
throttle position
sensor connector
 Poor contact in
ECM connector.
 Poor contact in
coupling connector
 Poor contact in
joint connector
7 CHECK HARNESS BETWEEN ECM AND
TUMBLE GENERATOR VALVE POSITION
SENSOR CONNECTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance of harness
between ECM connector and throttle position
sensor connector.
Connector & terminal
(B136) No. 27 — (E54) No. 3:Is the resistance less than 1
Ω?Go to step 8.Repair the har-
ness and connec-
tor.
N
OTE:
In this case repair
the following:
 Open circuit in
harness between
tumble generator
valve position sen-
sor and ECM con-
nector
 Poor contact in
ECM connector.
 Poor contact in
tumble generator
valve position sen-
sor connector
 Poor contact in
coupling connector
8 CHECK HARNESS BETWEEN ECM AND
THROTTLE POSITION SENSOR CONNEC-
TOR.
Measure the resistance of harness between
tumble generator valve position sensor con-
nector and engine ground.
Connector & terminal
(E54) No. 3 — Engine ground:Is the resistance more than 1
MΩ?Go to step 9.Repair ground
short circuit in har-
ness between tum-
ble generator valve
position sensor
and ECM connec-
tor.
9 CHECK POOR CONTACT.
Repair poor contact in tumble generator valve
position sensor connector.Is there poor contact in tumble
generator valve position sen-
sor connector?Repair the poor
contact in tumble
generator valve
position sensor
connector.Replace the tum-
ble generator valve
assembly. FU(H4DOTC)-42,
Tu m b l e G e n e r a t o r
Valve Assembly.> Step Check Yes No

EN(H4DOTC)-259
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CC:DTC P1089 TUMBLE GENERATED VALVE POSITION SENSOR 1 CIRCUIT
HIGH
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
 Erroneous idling
 Engine stalls.
 Poor driving performance
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode .
WIRING DIAGRAM:
LHD model
EN-02345
E54
F74
123
F61
125678
131415169101112
34
17181920
E2
E54
F61
F74
B200
F2
B100
B122 TUMBLE GENERATOR VALVE
POSITION SENSOR RH
1
32
20
918
1 2
B136 ECM
16
35 27
177
16
B136
F2
B122
1234 5678910 11 12 13 14 15 16 17 18 19 20
12345678
56
782 1
94 310
24 22 23 2511 12 13
1415
26 27
2816
17 18 19 20 21
33 34 29
32 30
31 35
34
12 8910 11
12 13 14 15 16 17 18 19 20 21 22 23 2456 7

EN(H4DOTC)-260
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
RHD model
EN-02346
E3
E54
B22
B122 TUMBLE GENERATOR
POSITION SENSOR RH
1
32
20
918
1 2
B136 ECM
9
19 27
E54
123
B22
125678
131415169101112
34
17181920
B136
B122
12345678
56
782 1
94 310
24 22 23 2511 12 13
1415
26 27
2816
17 18 19 20 21
33 34 29
32 30
31 35

EN(H4DOTC)-261
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
1 CHECK CURRENT DATA.
1) Start the engine.
2) Read the data of tumble generator valve
position sensor signal using Subaru Select
Monitor or OBD-II general scan tool.
N
OTE:
 Subaru Select Monitor
For detailed operation procedure, refer to
“READ CURRENT DATA SHOWN ON DIS-
PLAY FOR ENGINE”. 33, Subaru Select Monitor.>
 OBD-II general scan tool
For detailed operation procedures, refer to the
OBD-II General Scan Tool Operation Manual.Is the voltage more than 4.9 V? Go to step 2.Even if the mal-
function indicator
light illuminates,
the circuit has
returned to a nor-
mal condition at
this time.A tempo-
rary poor contact
of the connector
may be the cause.
N
OTE:
In this case repair
the following:
 Poor contact in
tumble generator
valve position sen-
sor connector
 Poor contact in
ECM connector.
 Poor contact in
coupling connector
2 CHECK HARNESS BETWEEN TUMBLE
GENERATOR VALVE POSITION SENSOR
AND ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from throttle
position sensor.
3) Measure the resistance of harness
between tumble generator valve position sen-
sor connector and engine ground.
Connector & terminal
(E54) No. 2 — Engine ground:Is the resistance less than 5
Ω?Go to step 3.Repair the har-
ness and connec-
tor.
N
OTE:
In this case repair
the following:
 Open circuit in
harness between
tumble generator
valve position sen-
sor and ECM con-
nector
 Poor contact in
coupling connector
 Poor contact in
joint connector
3 CHECK HARNESS BETWEEN TUMBLE
GENERATOR VALVE POSITION SENSOR
AND ECM CONNECTOR.
1) Turn the ignition switch to ON.
2) Measure the voltage between throttle posi-
tion sensor connector and engine ground.
Connector & terminal
(E54) No. 3 (+) — Engine ground (
−):Is the voltage more than 4.9 V? Repair battery
short circuit in har-
ness between tum-
ble generator valve
position sensor
and ECM connec-
tor.After repair,
replace the ECM.
FU(H4DOTC)-50,
Engine Control
Module (ECM).>Replace the tum-
ble generator valve
assembly. FU(H4DOTC)-42,
Tu m b l e G e n e r a t o r
Valve Assembly.>

EN(H4DOTC)-262
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CD:DTC P1090 TUMBLE GENERATED VALVE SYSTEM 1 (VALVE OPEN)
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode .
CE:DTC P1091 TUMBLE GENERATED VALVE SYSTEM 1 (VALVE CLOSE)
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode .
Step Check Yes No
1 CHECK ANY OTHER DTC ON DISPLAY.Is any other DTC displayed? Inspect the rele-
vant DTC using
“List of Diagnostic
Trouble Code
(DTC)”. EN(H4DOTC)-74,
List of Diagnostic
Trouble Code
(DTC).>Go to step 2.
2 CHECK TUMBLE GENERATOR VALVE RH.
1) Remove the tumble generator valve assem-
bly.
2) Check tumble generator valve body.Does the tumble generator
valve move smoothly? (No dirt
or foreign materials clogged)Replace the tum-
ble generator valve
assembly. FU(H4DOTC)-42,
Tumble Generator
Valve Assembly.>Clean tumble gen-
erator valve.
Step Check Yes No
1 CHECK ANY OTHER DTC ON DISPLAY.Is any other DTC displayed? Inspect the rele-
vant DTC using
“List of Diagnostic
Trouble Code
(DTC)”. EN(H4DOTC)-74,
List of Diagnostic
Trouble Code
(DTC).>Go to step 2.
2 CHECK TUMBLE GENERATOR VALVE RH.
1) Remove the tumble generator valve assem-
bly.
2) Check tumble generator valve body.Does the tumble generator
valve move smoothly? (No dirt
or foreign materials clogged)Replace the tum-
ble generator valve
assembly. FU(H4DOTC)-42,
Tumble Generator
Valve Assembly.>Clean tumble gen-
erator valve.

EN(H4DOTC)-263
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CF:DTC P1092 TUMBLE GENERATED VALVE SYSTEM 2 (VALVE OPEN)
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode .
CG:DTC P1093 TUMBLE GENERATED VALVE SYSTEM 2 (VALVE CLOSE)
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode .
Step Check Yes No
1 CHECK ANY OTHER DTC ON DISPLAY.Is any other DTC displayed? Inspect the rele-
vant DTC using
“List of Diagnostic
Trouble Code
(DTC)”. EN(H4DOTC)-74,
List of Diagnostic
Trouble Code
(DTC).>Go to step 2.
2 CHECK TUMBLE GENERATOR VALVE RH.
1) Remove the tumble generator valve assem-
bly.
2) Check tumble generator valve body.Does the tumble generator
valve move smoothly? (No dirt
or foreign materials clogged)Replace the tum-
ble generator valve
assembly. FU(H4DOTC)-42,
Tumble Generator
Valve Assembly.>Clean tumble gen-
erator valve.
Step Check Yes No
1 CHECK ANY OTHER DTC ON DISPLAY.Is any other DTC displayed? Inspect the rele-
vant DTC using
“List of Diagnostic
Trouble Code
(DTC)”. EN(H4DOTC)-74,
List of Diagnostic
Trouble Code
(DTC).>Go to step 2.
2 CHECK TUMBLE GENERATOR VALVE RH.
1) Remove the tumble generator valve assem-
bly.
2) Check tumble generator valve body.Does the tumble generator
valve move smoothly? (No dirt
or foreign materials clogged)Replace the tum-
ble generator valve
assembly. FU(H4DOTC)-42,
Tumble Generator
Valve Assembly.>Clean tumble gen-
erator valve.

EN(H4DOTC)-264
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CH:DTC P1094 TUMBLE GENERATED VALVE SIGNAL 1 CIRCUIT MALFUNC-
TION (OPEN)
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode .
WIRING DIAGRAM:
EN-02347
E55F61: LHDF74
12
125678
131415169101112
34
17181920
B22: RHD
E2
E55
F61
B134 ECM
8
TUMBLE
GENERATOR VALVE
ACTUATOR RH
RHD
RHD : LHD : RHD
B22
F74
B200
9
5
6
1
2
LHDLHD
LHDLHD
RHD
RHD
B134
34
12 8910 11
12 13 14 15 16 17 18 19 20 21 22 23 2456 756 7
82 1
94 310
24 22 23 25 11 12 13 14 15
26 27
2816 17
18 19 20 21
33 34 29
32 30 31
: LHD : RHDE3
12
13

EN(H4DOTC)-265
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
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 and ECM connector.
3) Measure the resistance between tumble
generator valve actuator and ECM connector.
Connector & terminal
(E55) No. 1 — (B134) No. 9:
(E55) No. 2 — (B135) No. 8:Is the resistance less than 1
Ω?Go to step 2.Repair the open
circuit between
ECM and tumble
generator valve
connector.
N
OTE:
In this case repair
the following:
 Open circuit in
harness between
ECM and tumble
generator valve
actuator connec-
tor.
 Poor contact in
coupling connector
2 CHECK POOR CONTACT.
Check poor contact in tumble generator valve
actuator connector.Is there poor contact in tumble
generator valve actuator con-
nector.Repair the poor
contact in tumble
generator valve
actuator connec-
tor.Replace the tum-
ble generator valve
assembly. FU(H4DOTC)-42,
Tu m b l e G e n e r a t o r
Valve Assembly.>

EN(H4DOTC)-266
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
CI: DTC P1095 TUMBLE GENERATED VALVE SIGNAL 1 CIRCUIT MALFUNC-
TION (SHORT)
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
After repair or replacement of faulty parts, conduct Clear Memory Mode ERATION, Clear Memory Mode.> and Inspection Mode .
WIRING DIAGRAM:
EN-02347
E55F61: LHDF74
12
125678
131415169101112
34
17181920
B22: RHD
E2
E55
F61
B134 ECM
8
TUMBLE
GENERATOR VALVE
ACTUATOR RH
RHD
RHD : LHD : RHD
B22
F74
B200
9
5
6
1
2
LHDLHD
LHDLHD
RHD
RHD
B134
34
12 8910 11
12 13 14 15 16 17 18 19 20 21 22 23 2456 756 7
82 1
94 310
24 22 23 25 11 12 13 14 15
26 27
2816 17
18 19 20 21
33 34 29
32 30 31
: LHD : RHDE3
12
13

EN(H4DOTC)-267
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
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 gen-
erator valve actuator and chassis ground.
Connector & terminal
(E55) No. 1 (+) — Chassis ground (
−):
(E55) No. 2 (+) — Chassis ground (
−):Is the voltage less than 5 V? Replace the tum-
ble generator valve
assembly. FU(H4DOTC)-42,
Tumble Generator
Valve Assembly.>Repair the battery
short circuit
between ECM and
tumble generator
valve actuator.