Mode Status
Error DB01 *2
(Communication
Control)Dual sound is detected. Check harness for power supply
system of component shown by
auxiliary code.
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 Check harness for power supply
system of component shown by
auxiliary code.
Check harness for communica-
tion system of component shown by
auxiliary code.
No response to
connection
checkComponent 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. Check harness for power supply
of component shown by auxiliary
code
Check harness for communica-
tion system of component shown
by auxiliary code D8
D9 Last Mode
Error Check harness for power supply
of component shown by auxiliary
code
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
disconnectedComponent 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. Check harness for power supply
of component shown by auxiliary
code
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. Check harness for power supply
of component shown by auxiliary
code.
Check harness for communica-
tion system of component shown by
auxiliary code.
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±814
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
Physical address: 190 Radio receiver assembly
Diagnosis item
ROM Error
Absence of
MasterDiagnosis contentCountermeasure 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. Check harness for power supply
system of multi display.
Check harness for communica-
tion system of multi display.
Check harness for power supply
system of radio receiver assembly.
Check harness for communica-
tion system of radio receiver as-
sembly.
DTC
21
D6Replace radio receiver assembly.
RAM Error Error is detected in internal RAM. 01
(Communication
Control)22Replace 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 Check harness for power supply
system of component shown by
auxiliary code.
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
ErrorNo 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. Check harness for power supply
of component shown by auxiliary
code.
Check harness for communica-
tion system of component shown by
auxiliary code. Check harness for power supply
of component shown by auxiliary
code.
Check harness for communica-
tion system of component shown by
auxiliary code.
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.)
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. If this error occurs frequently, re-
place multi±display assembly.
± DIAGNOSTICSNAVIGATION SYSTEM
DI±815
2001 PRIUS (RM778U)
