2001 TOYOTA PRIUS Service Repair Manual

Diagnostic mode operation confirmation:
Check the taillight lights up soon after the input opera-
tion of self diagnostic mode.
Ignition Switch OFF
0.2 sec. 0.5 sec.
OFF ON Taillight


Taillight light up should be maximum despite the con-
troller.Is the method to input the diagnostic mode
correct?
Is the function of operation confirmation
taillight normal?
Taillight faulty.
No
No
Ye s
Confirmation of diagnostic mode:
Check taillight light up when pressing on each switch of
transmitter.
(1) Received normal wave of LOCK switch.
NoYe s Ye s
No response
(2) Received normal wave of UNLOCK switch.
(3) Received normal wave of PANIC switch.
(4) Compatibility of the recognition code or out from
synchronization of rolling code.*.
OFF ON
OFF ON
OFF ON
OFF ON
0.2 sec. 0.5 sec.
0.2 sec.
0.2 sec.0.5 sec.
0.5 sec. 0.5 sec.
Transmitter faulty or wireless door lock re-
ceiver faulty.


Use another (normal) transmitter and
check with the diagnostic mode and in the
case that the check result shows the trans-
mitter faulty, it can be judged that wireless
door lock receiver is normal.
While receiving
In case of taillight
outputs of (4) In case of taillight
outputs from (1) ± (3)
Not enter in
diagnostic
mode
BE±80
± BODY ELECTRICALWIRELESS DOOR LOCK CONTROL SYSTEM
2001 PRIUS (RM778U)

Transmitter faulty or wireless door lock receiver
faulty.

Check the wave reaching range with another
transmitter (normal). When the range is normal,
transmitter defection is detected, the range is
not normal, wireless door lock receiver defection
is defected.
The wave reaching range check:
Is the wave reaching range normal?
(1 M area around vehicle)
(While the transmitting switch is pressed,
(approx. 20 secs.) the taillight continuously.
After 20 secs., repress the switch again.)
NoOther body control system faulty.
(Transmitter and receiver are normal.)
Ye s
No
Wireless door control receiver check:
Ye sWire harness faulty (short circuit).
Ye s
RDA terminal open circuit.
No
Check RDA terminal circuit.
Check that the voltage of RDA is about 6 ± 7 V
(when the transmitter is ON).
No
When pressing each switch of
the new or normal transmitter
used in the same type vehicle,
check that all taillights chirps
in the same way.
Transmitter faulty.
Ye s
Check that continuity exists between the receiver
terminal 3 (PRG) and body ECU terminal B9
(PRG).
Check that continuity exists between the receiver
terminal 2 (RDA) and body ECU terminal B10
(RDA).
± BODY ELECTRICALWIRELESS DOOR LOCK CONTROL SYSTEM
BE±81
2001 PRIUS (RM778U)

BE±82
± BODY ELECTRICALWIRELESS DOOR LOCK CONTROL SYSTEM
2001 PRIUS (RM778U)
DOME fuse or wire harness faulty.
Ye s
+B power source check:
Check that there is constantly 10 to 14 V voltage at the
connector terminal 5 (+B) of wireless door control
receiver.
No
Wire harness faulty.
Body ground open and contact error.
Ye s
Body ground check:
Check that continuity exists between the connector
terminal 1 (GND) of the wireless door control receiver
and body ground.
No
Wireless door control receiver faulty.

BE0OJ±12
I12019
Dry cell battery (1.5 V x 2)
± BODY ELECTRICALWIRELESS DOOR LOCK CONTROL SYSTEM
BE±83
2001 PRIUS (RM778U)
INSPECTION
1. INSPECT WIRELESS DOOR LOCK TRANSMITTER
OPERATION
HINT:
Refer to ºWireless door lock control receiver and transmitter re-
placementº on page BE±87.
(a) Using a screwdriver, remove and cover.
(b) Remove the battery (lithium battery).
(c) Install a new or normal battery (lithium battery).
HINT:
When a new or normal battery can not be obtained, connect 2
new 1.5 V batteries in series, connect the battery (+) to the bat-
tery receptacle side terminal and battery (±) to the bottom termi-
nal, then apply 3 V voltage to the transmitter.
(d) In the location where is approx. 1 M away from driver's
outside handle in the right direction, and check the trans-
mitter operation when pressing transmission switch on
the surface of the transmitter body.
Standard:
Remote control of vehicle door lock can be operated.
HINT:

The minimum operation distance differs according to op-
erator, the way of holding, and location.

As weak wave is used, operation distance might be short-
ened when noise is detected in strong wave or used fre-
quency.
(e) Install the battery (lithium battery).
(f) Install a cover so that rubber cover is not distorted or
slipped off.