2001 TOYOTA PRIUS Service Repair Manual

I15498
23 5
7
8 9Body ECU
S B9
B8PRG
RDA R±G
B±R
LB8 +B
PRG
RDAR±GFFJ27
J/C W5
Wireless Door
Control Receiver
± DIAGNOSTICSBODY CONTROL SYSTEM
DI±733
2001 PRIUS (RM778U)
Wireless door lock tuner circuit
CIRCUIT DESCRIPTION
The signal from the transmitter will be input to the body ECU through RDA line. RDA line is diagnosed by
the body ECU, so check DTC also in case of the failure of the wireless function.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check that DTC 42 is not output
NG Check the RDA line.
OK
DI7O0±01

DI±734
± DIAGNOSTICSBODY CONTROL SYSTEM
2001 PRIUS (RM778U)
2 Check wireharness
PREPARATION:
Disconnect connectors of wireless door lock tuner and of body ECU.
CHECK:
Check continuity between terminals RCO of wireless door lock tuner and RCO of body ECU.
OK:
Continuity
NG Repair or replace wireharness
OK
3 Check the wireless door lock tuner
CHECK:
Replace the wireless door lock tuner and check if it recovers normally.
OK:
Must be recovered normally.
NG Proceed to next circuit inspection shown on
problem symptoms table.(See page DI±683)
NG
Failure of the original wireless door lock tun-
er.

DI2BM±11
I15588
P9 Power Window
Master SW
Instrument Panel J/B
J20
J/C5
1
IG CPUB
B L±Y 1
IG1
C4 W±R
R±L 3
IC1
8
IC1 L±Y L±YC
J25 B
J24 4
2D 2
2G
W±R
R±L
C
R±L 20A PWR1
5A AM1
I15 Ignition SwitchIG1 Relay
IG1 AM1
B±Y W±G11
2J
1
2H
3
2B
24
L±Y
6
2D12 3
510A GAUGE
10
2K
W
15A DOME
7
1J8
2K
Engine Room J/B
2
1BBFL Block No. 1
1
F11100A DC/DC
B±G
F18 FL Block No. 2
120A MAIN 1
F121
F13
1
Battery
ID IGA J11 J/C
W±B
J17 J/CW±B1
IC1
W±B9
E Instrument Panel J/B
AJ/C DI±740
± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
2001 PRIUS (RM778U)
CIRCUIT INSPECTION
Power source circuit
CIRCUIT DESCRIPTION
This circuit provides power to operate the driver door ECU.
WIRING DIAGRAM

± DIAGNOSTICSDRIVER DOOR CONTROL SYSTEM
DI±741
2001 PRIUS (RM778U)
INSPECTION PROCEDURE
1 Check PWR1, AM1 and DOME fuse.
CHECK:
Check continuity of PWR1, AM1 and DOME fuse.
OK:
Continuity
NG Replace the failure fuse.
OK
2 Check voltage between terminals B, CPUB, IG and GND of driver door ECU con-
nector.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals IG, and GND.
OK:
Voltage: 10 ± 14V
PREPARATION:
(a) Turn ignition switch OFF.
(b) Disconnect the driver door ECU connector.
CHECK:
Measure voltage between terminals B, CPUB and GND.
OK:
Voltage: 10 ± 14V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±734).
NG