Subaru Legacy IV (2008 year). Manual - part 1094

IDI-17

Combination Meter System

INSTRUMENTATION/DRIVER INFO

12.COMMUNICATION ERROR DISPLAY

When the following error code is displayed in the
odo/trip meter, inspect the communication circuit
since the communication failure is generated be-
tween each control module. <Ref. to LAN(diag)-2,
Basic Diagnostic Procedure.>
Since the communication error is not displayed on
the multi-information display meter, perform the in-
spection by referring to the “Basic Diagnostic Pro-
cedure” on the LAN(diag) section.

IDI00223

Error code

Remarks

Er IU

Malfunction in integrated unit

Er ––

Simultaneous malfunction of high/low speed CAN communication

Er HC

High speed CAN communication failure

Er LC

Low-speed CAN communication failure

Er EG

EGI communication failure

Er TC

TCM communication failure

Er Ab

ABS/VDC communication failure

Er SP

ABS/VDC DTC information and vehicle speed pulse malfunction

Er SS

Wheel speed data malfunction

IDI-18

Combination Meter System

INSTRUMENTATION/DRIVER INFO

13.DTC DISPLAY MODE

It is possible to display the DTC of the combination meter through the following procedures.
1) Within 3 seconds after turning the ignition switch to ON, set the lighting switch to tail light or headlight po-
sition.
2) Press the odo/trip meter knob four times.
3) Turn the lighting switch to OFF, and press the odo/trip meter knob four times.
4) Set the lighting switch to tail light or headlight position again, and press the odo/tripmeter knob four times.

NOTE:
• Perform the steps described in 2) and 4) within 10 seconds.
• When the engine starts during diagnosis, the self-diagnosis function is not cancelled, however, once turn-
ing the ignition switch to OFF or the vehicle starts driving, DTC display mode is cancelled automatically for
safety.
• When the DTC display mode operates, {ECM}, {TCM}, {ABS/VDC} is displayed cyclically in this order for
every three seconds or every press of the trip knob. DTC is displayed in the following table according to type
of control module, receiving DTC, DTC detected, No DTC.
• Past problems are displayed on the DTC display. When the DTC of individual control modules changes in
status from current trouble to past trouble, and the trouble is fixed, the DTC will no longer appear in the com-
bination meter if the engine is started three times or more.
• Normal meter

• Meter with multi-information display

NOTE:
Because the MT model is not equipped with a TCM, only “Receiving DTC” is displayed.

Control module

Condition

Display

ECM

Receiving DTC

Trip “A” + “P (Blink)”

DTC detected

Trip “A” + “P xxxx”

No DTC

Trip “A” + “P ----”

TCM

Receiving DTC

Trip “B” + “P (Blink)”

DTC detected

Trip “B” + “P xxxx”

No DTC

Trip “B” + “P ----”

ABS/VDCCM

Receiving DTC

Trip “A” + “C (Blink)”

DTC detected

Trip “A” + “C xxxx”

No DTC

Trip “A” + “C ----”

When CAN communication error 
is occurred

 — 

“----”

Control module

Multi screen

Condition

Multi display

ECM

EGI fail code

Receiving DTC

“P” blinking

P xxxx DTC detected

“P xxxx”

 

No DTC

“P ----”

TCM

TCM fail code

Receiving DTC

“P” blinking

P xxxx DTC detected

“P xxxx”

 

No DTC

“P ----”

ABS/VDCCM

ABS fail code

Receiving DTC

“C” blinking

P xxxx DTC detected

“C xxxx”

 

No DTC

“C ----”

When CAN communication error 
is occurred

Body CAN fail

 — 

 — 

-----

IDI-19

Clock System

INSTRUMENTATION/DRIVER INFO

3. Clock System

A: WIRING DIAGRAM

1. CLOCK

<Ref. to WI-178, WIRING DIAGRAM, Clock System.>

B: INSPECTION

1. SYMPTOM CHART

2. CHECK POWER SUPPLY AND GROUND CIRCUIT

3. CHECK ILLUMINATION CIRCUIT

Symptoms

Repair order

Reference

No display is shown.

1. Power supply
2. Clock body

<Ref. to IDI-19, CHECK POWER SUPPLY AND 
GROUND CIRCUIT, INSPECTION, Clock System.>

Illumination does not illuminate.

1. Illumination power supply
2. Clock body

<Ref. to IDI-19, CHECK ILLUMINATION CIRCUIT, 
INSPECTION, Clock System.>

“Acc” or “ign” is displayed.

ACC or ignition power supply

<Ref. to IDI-20, CHECK ACC OR IGNITION POWER 
SUPPLY, INSPECTION, Clock System.>

“Err” is displayed in all items.

1. Communication circuit between 
combination meter and clock
2. Clock body

<Ref. to IDI-20, CHECK COMMUNICATION CIR-
CUIT, INSPECTION, Clock System.>

“Err” is displayed when a particu-
lar item is selected.

Communication circuit between com-
bination meter and individual control 
modules

<Ref. to IDI-17, COMMUNICATION ERROR DIS-
PLAY, INSPECTION, Combination Meter System.>

“Err” is displayed on the display of 
the ambient temperature.

1. Ambient sensor
2. Clock body

<Ref. to IDI-20, CHECK AMBIENT SENSOR, 
INSPECTION, Clock System.>

“Err” is displayed on the Instanta-
neous fuel economy, Average fuel 
economy, and the Remaining dis-
tance.

1. Communication circuit between 
combination meter and individual 
control modules
2. Clock body

<Ref. to IDI-17, COMMUNICATION ERROR DIS-
PLAY, INSPECTION, Combination Meter System.>

Step

Check

Yes

No

1

CHECK CLOCK POWER SUPPLY.
1) Disconnect the clock harness connector.
2) Measure the voltage between the clock har-
ness connector and chassis ground.

Connector & terminal

(i59) No. 10 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Go to step 2.

Check the harness 
for a open or short 
between the fuse 
and clock.

2

CHECK CLOCK GROUND CIRCUIT.
1) Turn the ignition switch to OFF.
2) Measure the resistance between the clock 
harness connector and chassis ground.

Connector & terminal

(i59) No. 6 — Chassis ground:

Is the resistance less than 10 

:? Replace the clock 

body.

Repair the wiring 
harness.

Step

Check

Yes

No

1

CHECK ILLUMINATION CIRCUIT POWER 
SUPPLY.
1) Turn the ignition switch to OFF.
2) Disconnect the clock harness connector.
3) Turn the ignition switch and lighting switch to 
ON.
4) Measure the voltage between the clock har-
ness connector and chassis ground.

Connector & terminal

(i59) No. 1 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Replace the clock 
body.

Check the harness 
for a open or short 
between the fuse 
and clock.

IDI-20

Clock System

INSTRUMENTATION/DRIVER INFO

4. CHECK ACC OR IGNITION POWER SUPPLY

5. CHECK COMMUNICATION CIRCUIT

6. CHECK AMBIENT SENSOR

Step

Check

Yes

No

1

CHECK ACC POWER SUPPLY.
1) Turn the ignition switch to OFF.
2) Disconnect the clock harness connector.
3) Turn the ignition switch to ACC.
4) Measure the voltage between the clock har-
ness connector and chassis ground.

Connector & terminal

(i59) No. 9 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Go to step 2.

Check for open cir-
cuits in the har-
ness between the 
fuse and the clock.

2

CHECK THE IGNITION POWER SUPPLY.
1) Turn the ignition switch to ON.
2) Measure the voltage between the clock har-
ness connector and chassis ground.

Connector & terminal

(i59) No. 8 (+) — Chassis ground (–):

Is the voltage 10 V or more?

Replace the clock 
body.

Check for open cir-
cuits in the har-
ness between the 
fuse and the clock.

Step

Check

Yes

No

1

CHECK HARNESS BETWEEN CLOCK AND 
COMBINATION METER.
1) Turn the ignition switch to OFF.
2) Disconnect the harness connector of the 
clock and the combination meter.
3) Measure the resistance between the har-
ness connector of the clock and the combina-
tion meter.

Connector & terminal

(i59) No. 1 — (i10) No. 13:

Is the resistance less than 10 

:? Go to step 2.

Repair the wiring 
harness.

2

CHECK COMMUNICATION ERROR DIS-
PLAY.
1) Connect all the disconnected connectors.
2) Turn the ignition switch to ON.
3) Check that the error code is displayed in 
odo/trip meter. (Except for meter with MID)

Is the error code “Er xx” dis-
played on odo/trip meter?

Check the commu-
nication circuit. 
<Ref. to IDI-17, 
COMMUNICA-
TION ERROR DIS-
PLAY, 
INSPECTION,
Combination Meter 
System.>

Replace the clock 
body. <Ref. to IDI-
28, Clock.>

Step

Check

Yes

No

1

CHECK BODY INTEGRATED UNIT.
1) Prepare the Subaru Select Monitor kit.
2) Turn the ignition switch to ON (engine OFF) 
and run the “PC application for Subaru Select 
Monitor”.
3) Read the DTC of body integrated unit using 
Subaru Select Monitor. <Ref. to LAN(diag)-12, 
OPERATION, Subaru Select Monitor.>

Is DTC displayed? <Ref. to 
LAN(diag)-31, LIST, List of 
Diagnostic Trouble Code 
(DTC).>

Repair it according 
to the DTC. <Ref. 
to LAN(diag)-31, 
LIST, List of Diag-
nostic Trouble 
Code (DTC).>

Go to step 2.