2004 SUBARU FORESTER Service Repair Manual

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Page 1857 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4DOTC)-224
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 exhaust temperature sen-
sor

EN(H4DOTC)-224
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 exhaust temperature sen-
sor 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 temperature less than
372°C (702°F)?Go to step 2.Repair the poor
contact.
N
OTE:
In this case repair
the following:
Poor contact of
exhaust tempera-
ture sensor
Poor contact in
ECM
Poor contact in
joint connector
2 CHECK HARNESS BETWEEN EXHAUST
TEMPERATURE SENSOR AND ECM CON-
NECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from exhaust
temperature sensor.
3) Measure the voltage between exhaust tem-
perature sensor connector and engine ground.
Connector & terminal
(B279) No. 1 (+) — Engine ground (
−):Is the voltage more than 10 V? Repair battery
short circuit in har-
ness between
ECM and exhaust
temperature sen-
sor connector.Go to step 3.
3 CHECK HARNESS BETWEEN EXHAUST
TEMPERATURE SENSOR AND ECM CON-
NECTOR.
1) Turn the ignition switch to ON.
2) Measure the voltage between exhaust tem-
perature sensor connector and engine ground.
Connector & terminal
(B279) No. 1 (+) — Engine ground (
−):Is the voltage more than 10 V? Repair battery
short circuit in har-
ness between
ECM and exhaust
temperature sen-
sor connector.Go to step 4.
4 CHECK HARNESS BETWEEN EXHAUST
TEMPERATURE SENSOR AND ECM CON-
NECTOR.
Measure the voltage between exhaust temper-
ature sensor connector and engine ground.
Connector & terminal
(B279) No. 1 (+) — Engine ground (
−):Is the voltage more than 4 V? Go to step 5.Repair the har-
ness and connec-
tor.
NOTE:
In this case repair
the following:
Open circuit in
harness between
ECM and exhaust
temperature sen-
sor connector
Poor contact of
exhaust tempera-
ture sensor con-
nector
Poor contact in
ECM connector.
Poor contact in
joint connector

Page 1858 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4DOTC)-225
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BO:DTC P0558 GENERATOR CIRCUIT LOW INPUT
NOTE:
Refer to DTC P0559 for diagnostic procedure. <Ref. to EN(H4DOT

Page 1859 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4DOTC)-226
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BP:DTC P0559 GENERATOR CIRCUIT HIGH INPUT
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:

Page 1860 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4DOTC)-227
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
1 CHECK HARNESS BETWEEN GENERATOR
AND ECM CONNECTOR.
1) Turn the ignition switch to OFF.
2

Page 1861 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4DOTC)-228
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BQ:DTC P0600 SERIAL COMMUNICATION LINK
DTC DETECTING CONDITION:
Immediately at fault recognition
CAUTION:
Aft

Page 1862 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4DOTC)-229
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step Check Yes No
1 CHECK HARNESS BETWEEN ECM AND
TCM.
1) Turn the ignition switch to OFF.
2) Disconnect the

Page 1863 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4DOTC)-230
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BR:DTC P0604 INTERNAL CONTROL MODULE READ ONLY MEMORY (ROM)
ERROR
DTC DETECTING CONDITION:
Immediately at fa

Page 1864 of 2870

SUBARU FORESTER 2004 Service Repair Manual EN(H4DOTC)-231
ENGINE (DIAGNOSTIC)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
RHD model
Step Check Yes No
1 CHECK ANY OTHER DTC ON DISPLAY.Does the Subaru Select Moni-
tor or OBD-II gene

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