2001 TOYOTA PRIUS light

I15491
Body ECU
1414 J/C
LCTY
B8
IF1
J30D D
J30
R±W R±W
R±W
L6
Luggage
Compartment
Light SW
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±727
2001 PRIUS (RM778U)
Luggage Courtesy Switch Circuit
CIRCUIT DESCRIPTION
The luggage courtesy switch goes on when luggage compartment door is opened and goes off when lug-
gage compartment door is closed.
WIRING DIAGRAM
DI7NW±01

I15514
DCTY
D7
Door Courtesy SW
Front RHIC17P9 Power Window
Master SW
R±Y
2
J16
J/C 3 D4 DIODE
(Door Courtesy)
R±W
AA
R±W16 R±Y
1
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
DI±747
2001 PRIUS (RM778U)
Door courtesy light and courtesy switch circuit
CIRCUIT DESCRIPTION
The door courtesy switch goes on when the door is opened and goes off when door is closed.
WIRING DIAGRAM
DI2BR±10

DI±748
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
1 Check operation of door courtesy light.
CHECK:
Check that door courtesy light comes on when door opened, and goes off when door is closed.
OK:
Must be operated normally.
OK Proceed to next circuit inspection shown on
problem symptom table (See page DI±734).
NG
2 Check courtesy light (See page BE±27).
NG Replace the courtesy light.
OK
3 Check courtesy switch (See page BE±27).
NG Replace the courtesy switch.
OK
4 Check wireharness and connector between courtesy light and driver door ECU,
courtesy switch and driver door ECU.
NG Repair or replace wireharness or connector.
OK
Proceed to next circuit inspection shown on
problem symptoms table
(See page DI±734).

± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±759
2001 PRIUS (RM778U)
2. BASIC INSPECTION
INSPECT BODY ECU
1 Check room light operation.
HINT:
With this inspection body ECU CPU can be diagnosed if it works normal or not.
CHECK:
Check if the room light works normal at DOOR position.
OK Go to next stepºOPEN DOOR INDICATOR LIGHT
INSPECTIONº.
NG
2 Check interior light system (Except body ECU) (See page BE±27).
OK Replace the body ECU.
NG
Repair of replace malfunction part.

I15594
A04550
Tc CG
DLC3
DI±760
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2001 PRIUS (RM778U)
INSPECT OPEN DOOR INDICATOR LIGHT
1 Check open door indicator light.
CHECK:
Check if open door Indicator light is turned on when either door
open.
HINT:
If open door Indicator light is not turned on, DTC will not be out-
put.
OK Go to step 3. ºDTC CHECKº.
NG
Repair the open door indicator light (See
page BE±39).
3. DTC CHECK (Using diagnosis check wire)
(a) Using SST, connect terminals Tc and CG of DLC3.
SST 09843±18020
(b) Turn the ignition switch ON.
(c) Read the DTC on the open door indicator light.

± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±789
2001 PRIUS (RM778U)
DTC B1293/93 Gateway ECU communication stop
CIRCUIT DESCRIPTION
This DTC is output when communication stops between gateway ECU and body ECU.
DTC No.DTC Detecting ConditionTrouble Area
B1293/93N i ti f t ECU th 10 d
Gateway ECUB1293/93No communication from gateway ECU more than 10 seconds.
Gateway ECU

Wireharness
WIRING DIAGRAM
See page DI±770
INSPECTION PROCEDURE
1 Check open door warning light.
CHECK:
Connection that the gateway ECU and BEAN (Body Electrical Area Network) can be checked by DTC trans-
mitted by the body ECU.
See ºINSPECT OPEN DOOR INDICATOR LIGHT on page DI±752.
NG Replace the gateway ECU.
OK
DI1SY±05

I15461
Display
check screen switch
DI±812
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
(e) VEHICLE SIGNAL CHECK MODE SCREEN
(1) Status of the Vehicle Signal which has been loaded into the display is checked in this screen.
(2) Signal Description
Battery: Displays battery voltage in V.
IG: Displays ON or OFF of the ignition switch.
PKB: Displays ON (applied) or OFF (released) of the parking brake.
SPEED: Displays the vehicle speed in km/h.
TAIL: Displays ON or OFF of the tail light switch.
(3) Display Check Screen Switch
Pressing this switch activates the Display Check Mode screen.

DI27Z±05
Physical address
Logical addressMeaning
Three±digit code (shown in hexadecimal) which is given to each component comprising the
AVC ± LAN
Corresponding to the function, individual symbols are specified..
Two±digit code (shown in hexadecimal) which is given to each function comprising the inner system
of the AVC ± LAN.
Physical address: 110 Multi display
Diagnosis item
Panel Switch
Error
Touch Switch
ErrorDiagnosis contentCountermeasure and
inspected parts
Error in panel switch input part is de-
tected.
(Error in switch control part, or inter-
nal communication error with switch
control part is detected.)
Error in touch switch sensor is de-
tected.
Inspect all switches on touch
switch test screen in display check
mode. If any of lines and point does
not react, replace multi±display as-
sembly.

If all switches function without
problem, observe them for a while.

Inspect all touch switches on
touch switch test screen in display
check mode. If any of lines does
not react, replace multi±display as-
sembly.

If all of vertical and horizontal
lines react normally, observe them
for a while. Logical address
21 *1
(Switch)
Replace multi±display assembly.
21
(Switch)
34
(Front passenger
monitor)
DTC
11
10
Error in power supply system for
picture circuit (abnormal voltage) is
detected. Error in Picture
Circuit 10
Decline in power output from in-
verter circuit for backlight. Backlight Error
(No current)Replace multi±display assembly.
34
(Front passenger
monitor)11
Excess power output from inverter
circuit for backlight.Replace multi±display assembly.
34
(Front passenger
monitor)12
Backlight Error
(Excess
current)
Abnormal condition of ROM is de-
tected.Replace multi±display assembly.
01
(Communication
control)21ROM Error
Abnormal condition of RAM is de-
tected.Replace multi±display assembly.
01
(Communication
control)22RAM Error
Terms
*1: Check if the operation in Touch Point Check or Touch Switch Check screen is normal. If it operates without any
problem, see how things go for a while.
Although this code is defined as Panel Switch Error, there are touch switches only on the display. If the internal com-
munication is erroneous, however, this code is stored.
± DIAGNOSTICSNAVIGATION SYSTEM
DI±813
2001 PRIUS (RM778U)
DIAGNOSTIC TROUBLE CODE CHART