2001 TOYOTA PRIUS display

I15590
A/C amplifier
MPX+ MP2+
A9A8A7
I15589
Combination Meter ECU
C10
C11MPX+
MPX±
I15528
Multi Display
TX3+
M2
M4M3
TX1+
TX1±
TX3±
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±765
2001 PRIUS (RM778U)
L

I15475
Multi DisplayG1
Gateway ECU
TX3+
TX3±M5
M54
11RR
G
G
12GTX+
5
GTX±
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±773
2001 PRIUS (RM778U)
DTC B1248/48 AVC±LAN circuit communication stop
CIRCUIT DESCRIPTION
This DTC is output when communication stops between gateway ECU and AVC±LAN circuit.
The body ECU performs the diagnosis check of the gateway ECU communication error to ºAVC±LANº.
The condition of registration can be checked by DTC of the body ECU.
DTC No.DTC Detecting ConditionTrouble Area
B1248/48C diti th t th t ECU t i t t AVC LAN
Gateway ECUB1248/48Condition that the gateway ECU cannot register to AVC±LAN.
Gateway ECU

Wireharness
WIRING DIAGRAM
DI7O2±01

I15538
Multi Display
TX3+
TX3±
Gateway ECU
GTX+
GTX±
DI±774
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
1 Check ºService check modeº of audio sysytem. (AVC±LAN diagnosis check)
(See page DI±791)
CHECK:
Connection of the gateway ECU can be checked by AVC±LAN diagnosis. (ºService check modeº of audio
sysytem)
OK:
Display
G/W: OK (Sysytem is normal)
G/W: NG (Communication error)
G/W: None (Never registered)
NG Replace the gateway ECU.
OK
2 Check wireharness
PREPARATION:
Disconnect connector ºG1º of gateway ECU and ºM2º of multi
display.
CHECK:
(a) Check continuity between terminals GTX+ of gateway
ECU and TX3+ of multi display.
(b) Check continuity between terminals GTX± of gateway
ECU and TX3± of multi display.
OK:
There is a continuity in wireharness of both (a) and (b), or either
(a) or (b).
HINT:
If there is OPEN in wireharness of either (a) or (b), please repair
it.
NG Repair or replace wireharness.
OK
Replace the gateway ECU.

I15546
ECM
E11
I15545
Gateway
ECU
G1
DI±780
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
HINT:
On the system structure point of view, this DTC cannot display meter. In case of checking DTC, please use
hand±held tester.
1 Check the communication circuit inside ECM.
PREPARATION:
Disconnect the connector ºE11º of ECM.
CHECK:
Check the DTC.
OK:
Code B1266 or B1267 is not output
OK Replace the ECM.
NG
2 Check the communication circuit inside gateway ECU.
PREPARATION:
(a) Connect the connector ºE11º of ECM.
(b) Disconnect the connector ºG1º of gateway ECU.
CHECK:
Check the DTC.
OK:
Code B1266 or B1267 is not output
OK Replace the gateway ECU.
NG

± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
DI±787
2001 PRIUS (RM778U)
DTC B1274/74 Multi display communication stop
CIRCUIT DESCRIPTION
This DTC is output when communication stops between multi display and body ECU.
DTC No.DTC Detecting ConditionTrouble Area
B1274/74N i ti f lti di l th 10 d
Multi displayB1274/74No communication from multi display more than 10 seconds.
Multi dis lay

Wireharness
WIRING DIAGRAM
See Page DI±770
DI1SY±04

I15538
Multi Display
Gateway ECU TX3+
GTX+
GTX± TX3±
DI±788
± DIAGNOSTICSMULTIPLEX COMMUNICATION SYSTEM
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
1 Check multi display ECU.
CHECK:
Check that the multi display operate normally.
HINT:
With this inspection, the multi display CPU can be diagnosed if it works normally or not.
NG Replace the multi display.
OK
2 Check wireharness.
PREPARATION:
Disconnect connector ºM2º of multi display and ºG1º of gateway
ECU.
CHECK:
(a) Check continuity between terminals TX3+ of multi display
and GTX+ of gateway ECU.
(b) Check continuity between terminals TX3± of multi display
and GTX± of gateway ECU.
OK:
There is a continuity in wireharness.
HINT:
If there is OPEN in wireharness, please repair it.
NG Repair or replace wireharness.
OK
Replace the multi display.

DI7OR±01
I17101
Navigation system normal operation
to 2. SYSTEM CHECK MODE SCREEN
to 4. DISPLAY
CHECK MODE SCREEN to 3. NAVIGATION
CHECK MODE SCREENDiagnosis start±up. (refer to next page)
HINT:
When Diagnosis Sys-
tem mode is started,
system check is per-
formed at first and the
check result is dis-
played. DI±796
± DIAGNOSTICSNAVIGATION SYSTEM
2001 PRIUS (RM778U)
PRE±CHECK
1. DIAGNOSIS SYSTEM MODE
HINT:
Diagnosis System Mode is operated as follows.

I15593
I17110
Concealed
touch
switch
± DIAGNOSTICSNAVIGATION SYSTEM
DI±797
2001 PRIUS (RM778U)
(a) DIAGNOSIS START±UP
To start the diagnosis menu, there are 2 ways: using a
diagnosis check wire and using a switch.
(b) START±UP BY SWITCH OPERATION
(1) Vehicle speed is 0 km/h (0 mph).
(2) Parking brake switch is pressed.
(3) Press the Display switch to display the Screen Ad-
justment screen.
(4) Repeatedly touch the upper and lower bottom parts
of the left end of the screen 3 times.
(c) FINISHING DIAGNOSIS SYSTEM MODE
Turn the ignition switch from ACC to OFF to finish the
mode. If it is started by switch operation.