Subaru Legacy IV (2008 year). Manual - part 210

GD(H4SO)-142

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

BX:DTC P0513 INCORRECT IMMOBILIZER KEY

1. OUTLINE OF DIAGNOSIS

2. ENABLE CONDITION

When starting the engine.

3. GENERAL DRIVING CYCLE

Perform the diagnosis only after starting the engine.

4. DIAGNOSTIC METHOD

Judge as NG when the conditions for the outline of the diagnosis of the top are established.

DTC

Item

Outline of Diagnosis

P0513

Incorrect Immobilizer Key

Incorrect immobilizer key (Use of unregistered key in body integrated unit)

P1570

Antenna

Faulty antenna

P1571

Reference Code Incompatibility

Reference code incompatibility between body integrated unit and ECM

P1572

IMM Circuit Failure 
(Except Antenna Circuit)

Communication failure between body integrated unit and ECM

P1574

Key Communication Failure

Failure of body integrated unit to verify key (transponder) ID code or transponder 
failure

P1576

EGI Control Module EEPROM

ECM malfunctioning

P1577

IMM Control Module EEPROM

Body integrated unit malfunctioning

P1578

Meter Failure

Reference code incompatibility between body integrated unit and combination 
meter

GD(H4SO)-143

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

BY:DTC P0600 SERIAL COMMUNICATION LINK

1. OUTLINE OF DIAGNOSIS

Detect malfunction of CAN communication.
When CAN communications is not possible, and CAN communications with TCM is not possible, judge as
NG if data from the TCM is not normal.

2. COMPONENT DESCRIPTION

ECM and TCM are connected by high speed CAN.

(Common Specifications)

CAN Protocol 2.0 B (Active)
Frame Format: 11 Bit ID Frame (Standard Frame)

(High speed CAN)

Conforms to ISO11898
Communication Speed: 500 kbps

3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE

Perform the diagnosis continuously after starting the engine.

5. DIAGNOSTIC METHOD

• Abnormality Judgement

Judge as NG when the following conditions are established.

Time Needed for Diagnosis: Less than 1 second
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

Secondary Parameters

Enable Conditions

None

 

Judgement Value

Malfunction Criteria

Threshold Value

Battery voltage

> 10.9 V

Starter switch

OFF

Engine

run

bus off flag or error warning flag

set (error)

or

 

ID received from control module con-
nected to driving system CAN

None during 500 milli-
seconds

or

 

Data updated from control module con-
nected to driving system CAN

None during 500 milli-
seconds

GD(H4SO)-144

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

• Normality Judgement

Judge as OK and clear the NG if the continuous time while the following conditions are established is more
than the predetermined time.

Time Needed for Diagnosis: 1000 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

Judgement Value

Malfunction Criteria

Threshold Value

Battery voltage

> 10.9 V

Starter switch

OFF

Engine

run

bus off flag or error warning flag

clear (No error)

ID received from control module con-
nected to driving system CAN

Yes

Data updated from control module con-
nected to driving system CAN

Yes

GD(H4SO)-145

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

BZ:DTC P0604 INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY 

(RAM) ERROR

1. OUTLINE OF DIAGNOSIS

Detect the malfunction of microcomputer (RAM).
When there is a problem in the main CPU normal RAM, or the sub CPU normal RAM, judge as NG. Judge
as OK when both are operating properly.
If it is possible to write data to the whole area of RAM in the initial routine, and is possible to read the same
data, it is judged as OK, and if not, NG.

2. ENABLE CONDITION

Diagnosis with the initial routine.

3. GENERAL DRIVING CYCLE

Perform the diagnosis as soon as the ignition switch is turned to ON.

4. DIAGNOSTIC METHOD

Abnormality Judgement

Judge as NG if the criteria below are met.

Time Needed for Diagnosis: Undetermined
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

Normality Judgement

Judge as OK and clear the NG when the malfunction criteria below are met.

Secondary Parameters

Enable Conditions

None

 

Judgement Value

Malfunction Criteria

Threshold Value

Main CPU normal RAM abnormal

 

Write 5AA5A55A and then read. (Whole 
area of RAM)

5AA5A55A cannot be 
read.

Write A55A5AA5 and then read. (Whole 
area of RAM)

A55A5AA5 cannot be 
read.

Sub CPU normal RAM abnormal

 

Write 5AA5 and then read. (Whole area 
of RAM)

5AA5 cannot be read.

Write A55A and then read. (Whole area 
of RAM)

A55A cannot be read.

Judgement Value

Malfunction Criteria

Threshold Value

Main CPU normal RAM abnormal

 

Write 5AA5A55A and then read. (Whole 
area of RAM)

5AA5A55A can be 
read.

And write A55A5AA5 and then read. 
(Whole area of RAM)

A55A5AA5 can be 
read.

Sub CPU normal RAM abnormal

 

Write 5AA5 and then read. (Whole area 
of RAM)

5AA5 can be read.

And write A55A and then read. (Whole 
area of RAM)

A55A can be read.