Subaru Legacy 2004 Service Manual page 3783

8. CHECK ENGINE COOLANT TEMPERATURE SENSOR.
Step
1 CHECK COMMUNICATION ERROR DIS-
PLAY.
1) Set the ignition switch to ON.
2) Check that the error code is displayed in
odo/trip meter.
2 CHECK ENGINE COOLANT TEMPERATURE
SENSOR.
Check the engine coolant temperature sensor.
<Ref. to EN(H4SO 2.0)(diag)-2, Basic Diag-
nostic Procedure.> <Ref. to
EN(H4DOTC)(diag)-2, Basic Diagnostic Proce-
dure.> <Ref. to EN(H6DO)(diag)-2, Basic
Diagnostic Procedure.>
9. COMMUNICATION ERROR DISPLAY
When the following error code is displayed in the
odo/trip meter, inspect the communication circuit
since the communication malfunction is generated
between each control module. <Ref. to LAN(diag)-
2, Basic Diagnostic Procedure.>
Combination Meter System
Is the error code "Er xx" dis-
played in odo/trip meter?
Is the engine coolant tempera-
ture sensor OK?
Er IU
Er !!
Er HC
Er LC
Er EG
Er TC
Er Ab
Er SP
IDI00100
Er SS
IDI-11
INSTRUMENTATION/DRIVER INFO
Check Yes
Check the commu-
nication circuit.
<Ref. to IDI-11,
COMMUNICA-
TION ERROR
DISPLAY,
INSPECTION,
Combination
Meter System.>
Replace the meter
case assembly.
Error code
No
Go to step 2.
Replace the
engine coolant
temperature sen-
sor.
Remarks
Malfunction in integrated unit
Simultaneous malfunction of
high/low speed CAN com-
munication
Malfunction of high-speed
CAN communication
Malfunction of low-speed
CAN communication
EGI Communication mal-
function
TCM Communication mal-
function
ABSCM/VDCCM Communi-
cation malfunction
ABSCM/VDCCM DTC infor-
mation, vehicle speed pulse
malfunction
Wheel speed data malfunc-
tion