precheck.pdf

05–599

DIAGNOSTICS

–

AUDIO SYSTEM (April, 2003)

05600–05

PRE–CHECK

DIAGNOSIS CHECK

(a)

Starting Diagnosis Mode (Service Check Mode)

(1)

Turn off the audio system and turn the IG switch to

ACC. While pressing the preset switches ”1” and ”6”

at the same time, press ”CD” 3 times.

(2)

Reference:

Beep sound is given 3 times and the system

enters the service check mode.

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It may take about 40 sec. to complete the

check.

In the service check mode, the system check

and the diagnosis memory check are per-

formed, and the check results are displayed

in ascending order of the device codes.

(physical address)

Terms

Meaning

Three–digit code (In hexadecimal) given to each device

comprising AVC–LAN. Corresponding to its function, individ-

ual symbol is provided.

Logical address Two–digit code (In hexadecimal) given to each function and

device unit in each device comprising AVC–LAN.

Code No. (physical address) List

Code No.

(physical address)

Component code

(Physical address)

Equipment name

190

Radio receiver assy (Audio head unit)

(b)

Finishing Diagnosis Mode

(1)

Press ”CD” for 2 sec. or more, or turn the IG switch

OFF.

2004 COROLLA (RM1037U)

Author:

Date:

764

05–600

DIAGNOSTICS

–

AUDIO SYSTEM (April, 2003)

(c)

Service Check Mode Result Display (for checking the cur-

rent and the past system conditions)

(1)

Press the ”TUNE” switch to see the check result of

each device.

P–––physical address

190–––device code

good–––”The component is normal”.

P–––physical address

440–––component code

CHEC–––”Check needed”.

The illustration shows the case that the system has 2 devices with codes 190 and 440, and the device (code

440) has a trouble.

The check result is displayed in ascending order of device code. The device code is displayed first, then the

check result.

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(2)

Check Result Display

Display

Original Language

Meaning

Action to be taken

No DTC is detected in both ”System Check Mode” and

”Diagnosis Memory Mode”.

good

Good (normal)

–

Check the power source cir-

cuit and the communication

circuit of the device indi-

cated by the device code

(physical address).

The system recognized the component when it was regis-

tered, but the component gives no response to the ”Diagno-

sis Mode ON Request”.

nCon

No connection

Go to the detail information

mode to check the trouble

area referring to the DTC

list.

One or more DTC for ”Exchange” is detected in either ”Sys-

tem Check Mode” or ”Diagnosis Memory Mode”.

ECHn

Exchange

Go to the detail information

mode to check the trouble

area referring to the DTC

list.

When no DTC is detected for ”Exchange”, one or more DTC

for ”Check is detected in either ”System Check Mode” or

”Diagnosis Memory Mode”.

CHEC

Check

2004 COROLLA (RM1037U)

Author:

Date:

765

05–601

DIAGNOSTICS

–

AUDIO SYSTEM (April, 2003)

Display

Original Language

Meaning

Action to be taken

Old DTC application is identified and DTC is detected in ei-

ther ”System Check Mode” or ”Diagnosis Memory Mode”.

Old

Old version

–

Check the power source cir-

cuit and the communication

circuit of the device indi-

cated by the device code

(physical code).

The device gives no response to any one of ”System Check

Mode ON Request”, ”System Check Result Request” and

”Diagnosis Memory Request”.

nrES

No response

(3)

To perform the Service Check again, press the pre-

set switch ”1”.

(d)

Detail information Mode (when displaying the troubled

device’s DTC)

(1)

With ”CHEC” or ”ECHn” being display, press the

preset switch ”2” to go to the detail information

mode.

(2)

Press the ”TUNE” switch to display ”System Check

Result (SyS)” and ”Diagnosis Memory Response

(COdE)”.

2004 COROLLA (RM1037U)

Author:

Date:

766

05–602

DIAGNOSTICS

–

AUDIO SYSTEM (April, 2003)

Service Check Mode

TUNE

PRESET SWITCH ”3”

PRESET SWITCH ”2”

Detail Information Mode

P–––physical address

190–––component code

TUNE

SyS–––system check result

TUNE

1–––the first code

62–––logical address

Detail information

of the first code

is displayed

TUNE

47–––DTC

TUNE

Continue to display detail information

when more than one DTC is detected.

TUNE

COdE–––diagnosis memory

response result

TUNE

2–––the second code

01–––logical address

TUNE

DC–––DTC

Detail information

of the second code

is displayed

TUNE

P–––physical address

440–––sub code

(*2)

TUNE

6F–––connection

check number

TUNE

05–––the number of times of

occurrence

(in decimal)

TUNE

Continue to display detail information

when more than one DTC is detected.

From *1

To *1

The illustration shows the case that the component with code 190 has DTC ”47” and ”DC” as a result of the

system check and the diagnosis memory response.

The detail information mode shows the system check result first, then the diagnosis memory response result.

(*2): As for DTC that does not have any sub code, sub code is not displayed.

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2004 COROLLA (RM1037U)

Author:

Date:

767

05–603

DIAGNOSTICS

–

AUDIO SYSTEM (April, 2003)

(3)

Displayed Items in Detail Information Mode

Order of detailed information displayed when the ”TUNE UP”

switch is pressed. (The order is reversed when the ”TUNE

DOWN” switch is pressed.)

Division Code for

DTC display

Meaning

Logical address "

DTC

SyS

System check result is displayed.

Logical address "

DTC "

Sub code

COdE

Diagnosis memory check result is displayed.

Connection confirmation number

The number of times of occurrence

(4)

Check the trouble area referring to the DTC list.

(See page 05–605 )

(5)

To return to the service check mode, press the pre-

set switch ”3”.

(e)

Clearing Individual DTC Memory (when clearing the

memory of DTC detected in the pest individually)

(1)

Press the preset switch ”5” for 2 sec. or more while

the ”ECHn” is displayed in the service check mode

or during the detail information mode.

HINT:

Beep sound is given once when the DTC memory is com-

pletely cleared.

When DTC memory is cleared, only the component code

(physical address) is displayed for the target component.

To check DTC, press the preset switch ”1” and perform the

service check again.

(f)

Clearance of all DTC memory (when clearing all the

memory of DTC detected in the past)

(1)

Start the diagnosis mode after repairing the trouble

area.

(2)

Press the preset switch ”5” for 2 sec. or more. (”CLr”

is displayed at this time.)

HINT:

Beep sound is given once when the DTC memory is com-

pletely cleared.

When DTC memory for all the device is cleared, only the

component codes (physical address) are displayed.

(3)

Press the preset switch ”1” to perform the service

check again, and check that no DTC is displayed for

all the component codes. (physical address)

2004 COROLLA (RM1037U)

Author:

Date:

768

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