Lexus RX300 (MCU15). Manual — part 379

Mode Status
Error

DB

01 *2
(Communication
Control)

Dual sound is detected.

D Check harness for power supply
system of component shown by
auxiliary code.
D Check harness for communica-
tion system of component shown by
auxiliary code.

Transmission
Error

DC

01 *4
(Communication
Control)

Transmission to component shown
by auxiliary code has been failed.
(This code does not necessarily
mean actual failure.)

If same component shown by auxil-
iary code is recorded in other com-
ponent(s), check harness for power
supply and communication system
of components shown sub code.

Slave Reset
(Momentary
Interruption)

DE

01 *5
(Communication
Control)

After engine start, slave component
has been disconnected.
DB

D Check harness for power supply
system of component shown by
auxiliary code.
D Check harness for communica-
tion system of component shown by
auxiliary code.

No response to
connection
check

Component shown by auxiliary
code is or was disconnected from
system after engine is started.

Component operated (sound and/
or image was provided) before en-
gine stop is or was disconnected
with ignition switch in ACC or ON.

D Check harness for power supply
of component shown by auxiliary
code
D Check harness for communica-
tion system of component shown
by auxiliary code

D8

D9

Last Mode
Error

D Check harness for power supply
of component shown by auxiliary
code
D Check harness for communica-
tion system of component shown
by auxiliary code

01 *3
(Communication
Control)

01 *2
(Communication
Control)

Multiple Frame
Abort

E4

01 *1
(Communication
Control)

Since this DTC is provided for engi-
neering, it may be detected when
no actual failure exists.

Multiple frame transmission is
aborted.

Registered
component
disconnected

Component shown by auxiliary
code is or was disconnected from
system with ignition switch in ACC
or ON.
Communication with component
shown by auxiliary code is not es-
tablished when engine is started.

D Check harness for power supply
of component shown by auxiliary
code
D Check harness for communica-
tion system of component shown by
auxiliary code

D5

01 *2
(Communication
Control)

No Response
to ON/OFF
Instruction

DA

01
(Communication
Control)

No response is identified when
changing mode (audio and visual
mode change). Detected when
sound and picture does not change
by button operation.

D Check harness for power supply
of component shown by auxiliary
code.
D Check harness for communica-
tion system of component shown by
auxiliary code.
D If error occurs again, replace
component shown by auxiliary
code.

*2: Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine.

*3: It is stored when 180 sec. has passed after the power supply connector is pulled out after engine start.

*4: It may be stored when the engine key is turned again 1 min. after engine start.

*5: It may be stored when the engine key is turned again after engine start.

DI–746

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

LEXUS RX300 (RM785E)

Physical address: 190 Radio receiver assembly

Diagnosis item

ROM Error

Absence of
Master

Diagnosis content

Countermeasure and
inspected parts

Error is detected in internal ROM.

Logical address

01
(Communication
Control)

01 *2
(Communication
Control)

Component in which this code is re-
corded has been disconnected from
system with ignition in ACC or ON.
Or, when this code was recorded,
multi–display assembly was discon-
nected.

D Check harness for power supply
system of multi display.
D Check harness for communica-
tion system of multi display.
D Check harness for power supply
system of radio receiver assembly.
D Check harness for communica-
tion system of radio receiver as-
sembly.

DTC

21

D6

Replace radio receiver assembly.

RAM Error

Error is detected in internal RAM.

01
(Communication
Control)

22

Replace radio receiver assembly.

No Response
to Connection
Check

01 *3
(Communication
Control)

Component shown by auxiliary code
is or had been disconnected from
system after engine start.
D9

D Check harness for power supply
system of component shown by
auxiliary code.
D Check harness for communica-
tion system of component shown by
auxiliary code.

D8

Last Mode Error

01 *2
(Communication
Control)

Component operated (sounds and/
or images were provided) before en-
gine stop is or has been discon-
nected with ignition switch in ACC or
ON.

Check harness for power supply
system of component shown by
auxiliary code.
Check harness for communication
system of component shown by
auxiliary code.

D9

No Response
to ON/OFF
Instruction

Mode Status
Error

No response is identified when
changing mode (audio and visual
mode change). Detected when
sound and picture does not change
by button operation.

DA

DB

01
(Communication
Control)

01 *2
(Communication
Control)

Dual alarm is detected.

D Check harness for power supply
of component shown by auxiliary
code.
D Check harness for communica-
tion system of component shown by
auxiliary code.

D Check harness for power supply
of component shown by auxiliary
code.
D Check harness for communica-
tion system of component shown by
auxiliary code.
D If error occurs again, replace
component shown by auxiliary
code.

Transmission
Error

DC

01 *4
(Communication
Control)

Transmission to component shown
by auxiliary code has been failed.
(Detecting this DTC does not nec-
essary mean actual failure.)

D If same auxiliary code is recorded
in other component, check harness
for power supply and communica-
tion system of components shown
sub code.

Master Reset
(Momentary
Interruption)

DD

01 *5
(Communication
Control)

After engine is started, multi–dis-
play assembly was disconnected
from system.

D If this error occurs frequently, re-
place multi–display assembly.

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

DI–747

LEXUS RX300 (RM785E)

Slave Reset
(Momentary
Interruption)

DE

01 *5
(Communication
Control)

After engine is started, slave com-
ponent was disconnected from sys-
tem.

D Check harness for power supply
of component shown by auxiliary
code.
D Check harness for communica-
tion system of component shown by
auxiliary code.

Master Error

DF

01 *6
(Communication
Control)

Due to defective condition of multi
display, master function is switched
to audio equipment.
Error occurs in communication be-
tween sub–master (audio) and mul-
ti display.

D Check harness for power supply
of multi–display assembly.
D Check harness for communica-
tion system of multi–display assem-
bly.
D Check harness for communica-
tion system between multi–display
assembly and sub–master compo-
nent.

Registration
Completion
Instruction
Error

E0

01
(Communication
Control)

”Registration Completion Instruc-
tion” command from multi display
cannot be received.

D Since this DTC is provided for en-
gineering purpose, it may be de-
tected when no actual failure exists.

Audio
processor ON
error

E1

01 *2
(Communication
Control)

While source equipment is operat-
ing, AMP output is stopped.

D Check harness for power supply
of multi–display assembly.
D Check harness for communica-
tion system of multi–display assem-
bly.

ON/OFF
Instruction
Parameter
Error

E2

01
(Communication
Control)

Error occurs in ON/OFF controlling
command from multi–display as-
sembly.

D Replace multi–display assembly.

Registration
Request
Transmission

E3

01
(Communication
Control)

Registration Request command is
output from slave component.
Receiving Connection Check
Instruction, Registration Request
command is output from sub–mas-
ter component.

D Since this DTC is provided for en-
gineering purpose, it may be de-
tected when no actual failure exists.

Plural Frame
Abort

E4

01
(Communication
Control)

D Since this DTC is provided for en-
gineering purpose, it may be de-
tected when no actual failure exists.

Plural frame transmission is
aborted.

AM Tuner Error

43

60
(Radio receiver
assembly)

Replace radio receiver assembly.

Abnormal condition is detected in
AM tuner.
Inspect radio receiver assembly.

FM Tuner Error

44

60
(Radio receiver
assembly)

Replace radio receiver assembly.

Abnormal condition is detected in
FM tuner.

Mechanical or
Media Error

40

61
(Cassette
switch)

Inspect cassette tape.

Malfunction due to mechanical fail-
ure is identified. Or, cassette tape is
cut or entangled.

EJECT
Malfunction

41

61
(Cassette
switch)

Malfunction due to mechanical fail-
ure.

Replace radio receiver assembly.

No Disc
Readout

42

62
(CD player)

Disc cannot be read.

Inspect CD.

CD Error

44

62
(CD player)

Error is detected in CD player.

Replace radio receiver assembly.

DI–748

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

LEXUS RX300 (RM785E)

EJECT Error

45

62
(CD player)

Magazine cannot be ejected.

Scratched/
Reversed Disc

46

62
(CD player)

Scratches or dirt is found on CD sur-
face or CD is set upside down.

Replace radio receiver assembly.

Inspect CD.

Physical address: 178 Navigation ECU

Gyro Error

Error in gyro sensor is detected.
(Abnormal value in voltage output
from sensor is detected for more
than specified time.)

D Check the Gyro voltage in the
diagnosis system mode.

10

58
(Navigation ECU)

Map Disc Error Data cannot be read for a specified

time due to scratches or dirt on disc
surface or insertion of music CD.

D Inspect disc and replace if neces-
sary. (Visually check disc surface
and wipe it with soft cloth.)

42

58
(Navigation ECU)

Vehicle speed
sensor Signal
Error

Input error of vehicle speed sensor
signal is detected. (When no vehicle
speed sensor signal has been input
for a specified time.)

D Check the vehicle speed signal in
the diagnosis system mode.
D Inspect wire harness for vehicle
speed signal.
D If wire harness is normal, replace
navigation ECU.

43

58
(Navigation ECU)

Player Error

Malfunction of player continues for a
specified length of time.

D Check if disc can be inserted/tak-
en out or not. If not , replace naviga-
tion ECU.
D When the same code is detected
in recheck after deleting the DTC
memory.

44

58
(Navigation ECU)

GPS Receiver
Error

Operation error of GPS receiver is
detected.

D At an outdoor site with a clear
view, operate to display the GPS in-
formation screen of the diagnosis
system. If GPS time stamp is not
properly displayed after 15 min. or
more, replace navigation ECU.

11

58
(GPS receiver)

GPS Antenna
Error

Operation condition of GPS anten-
na cable is detected. (Open circuit,
connection failure of connectors,
etc.)

D Check if the GPS antenna is cor-
rectly connected or positioned or
not. After replacing the antenna, if
the error remains, replace the navi-
gation ECU.

40

58
(GPS receiver)

Power Supply
Error of GPS
Antenna

Abnormal voltage of GPS antenna
cable or short circuit is detected.

D Inspect GPS antenna and replace
if necessary. (When no continuity is
identified between connector’s core
and sealed part, GPS antenna is
normal.)
D If GPS antenna is normal, replace
navigation ECU.

41

58
(GPS receiver)

Player Temp.
Too High

Readout cannot be done because
temperature around player’s pickup
(reading part) is too high.

With IG switch OFF, leave vehicle in
cool shaded place for a while and
recheck. After deleting the DTC
memory, If same code detected, re-
place navigation ECU.

45

58
(Navigation ECU)

*2: Even if no failure is detected, it may be stored depending on the battery condition or voltage for starting an engine.

*3: It is stored when 180 sec. has passed after the power supply connector is pulled out after engine start.

*4: It may be stored when the engine key is turned again 1 min. after engine start.

*5: It may be stored when the engine key is turned again after engine start.

*6: When 210 sec. has passed after pulling out the power supply connector of the master component with the ignition
switch in ACC or ON, this code is stored.

–

DIAGNOSTICS

LEXUS NAVIGATION SYSTEM

DI–749

LEXUS RX300 (RM785E)