TOYOTA PRIUS 2001 Service Repair Manual

Start
Insert a master key into the key cylinder.
Repeatedly turn the key from ignition switch LOCK to ON 4 times.
Remove the master key. Repeat door's open/close operation 5 times.
End
Insert the key to be registered into the key cylinder.
Turn the key from ignition switch LOCK to ON and stay for 60 secs. or more.
Remove the key from the key cylinder.
Register next key?
Open and close a door once.
No Ye s
Within 10 secs.
*5
Within 15 secs.
Within 20 secs.
Within 10 secs.
Within 10 secs.
*4 *3 *1
*2
BE±108
± BODY ELECTRICALHYBRID VEHICLE IMMOBILISER SYSTEM
1775 Author: Date:
2001 PRIUS (RM778U)
8. REGISTERING SUB±KEY
Initial condition: All doors closed, not key in cylinder.
*1: The 1 st door's open/close operation should be within 15 sec after key insertion.
*2: Remove the key within 20 sec. after the 1 st door's open/close operation.
*3: Insert the key within 10 sec. after preceding key removal.
*4: Turn the key from ignition switch LOCK to ON within 10 sec. after key insertion.
*5: If registering the other key, insert it into the key cylinder within 10 sec.

Start
Insert a master key into the key cylinder.
Repeatedly turn the key from ignition switch LOCK to ON 6 times.
Remove the master key. Repeat driver's door open/close operation 7 times.
End
*1: The 1 st door's open/close operation should be done within 15 sec after key insertion.
*2: Remove the key within 20 sec. after the 1 st door's open/close operation.
*1
*2
Within 15 secs.
Within 20 secs.
± BODY ELECTRICALHYBRID VEHICLE IMMOBILISER SYSTEM
BE±109
1776 Author: Date:
2001 PRIUS (RM778U)
9. ERASURE OF TRANSPONDER KEY CODE
(a) Do this operation to erase transponder key registration from the transponder key ECU.
HINT:
Delete all other master and sub±key codes leaving the master key code to use the operation. When using
the key which was used before deletion, it is necessary to register the code again.
(b) Initial condition: All doors closed, not key in cylinder.

BE1WC±01
I17846
Check Connector
OP1
I01826
Example
ON
OFF
Code 11 Code 21
4.5 sec. 2.5 sec. 1.5 sec.
0.5
sec.
± BODY ELECTRICALHYBRID VEHICLE IMMOBILISER SYSTEM
BE±111
2001 PRIUS (RM778U)
PRE±CHECK
1. TRANSPONDER KEY ECU INPUT CONDITION DIS-
PLAY READ CODE
(a) Connect the positive (+) lead from the volt meter (Analog
Type) to OP1 of the check connector and the negative (±)
lead to E1 of the check connector.
(b) Insert the ignition key in the key cylinder.
(c) Read the code from the movement of the tester needle.
If no code is output, turn the ignition switch ON.
If a code is now output, check if the DOME fuse is blown.
HINT:

The code can be read using a luminous diode (Recom-
mend activation current 10 ± 20 mA) instead of a tester.

A digital tester can also be used.
Display condition:

When there are multiple codes, they are output in order
staring from the lowest code.

After all the codes are output, Lo is displayed for 4.5
secs., then all the code are output again starting from the
lowest code.

If the situation changes during code output, Lo is output
for 4.5 secs. after output of the current code ceases, then
the codes are output again starting from the lowest code.
E.g. while 11 (out of 11 and 21) is being output, conditions
change and 12 is added. So after 11 is output, Lo is output
for 4.5 secs., then 11, 12 and 21 are output.
2. TRANSPONDER KEY ECU INPUT CONDITION DIS-
PLAY CODE LIST
CodeOutput condition
11Key unlock warning switch ON (Ignition key inserted)
12Any door is open. (Door courtesy switch ON)
13Ignition switch at ON position
21Master key is inserted in key cylinder and the immobiliser system
is OFF.
22Sub key is inserted in key cylinder and immobiliser system is
OFF.
31Key code recorded in transponder key ECU differs from code of
key inserted in key cylinder.
32Transponder key code cannot be read.
33Key code cannot be read because format of chip inside key is
wrong.
34Transponder key ECU has no memory space to register key
code.
52Hibrid vehicle control ECU is unlocked.

BE±112
± BODY ELECTRICALHYBRID VEHICLE IMMOBILISER SYSTEM
2001 PRIUS (RM778U)53
Hibrid vehicle control ECU code is error.
54Hibrid vehicle control ECU is check±sum error.
55Hibrid vehicle control ECU is factory code initialling.
58No response from hibrid vehicle control ECU
3. TRANSPONDER KEY ECU INPUT CONDITION DIS-
PLAY MALFUNCTION LIST
SymptomCause
No code is output.
1. DOME Fuse
2. Wire harness or connector
3. Transponder key ECU
Even when key is inserted in key cylinder, Code 11 is not output.
1. Key unlock warning switch
2. Wire harness or connector
3. Transponder key ECU
Code 12 is not output when the door is open.
1. Door courtesy switch
2. Wire harness or connector
3. Transponder key ECU
Code 13 is not output when ignition switch ON.
1. IGN Fuse
2. Wire harness or connector
3. Transponder key ECU
Code 31 is not output when key is inserted in key cylinder.Key code is not registered.
Code 32 is output.
1. Transponder key coil
2. Transponder key ECU
3. Wire harness or connector
Code 33 is output.Transponder key ECU
Code 34 is output.Transponder key ECU has no memory space to register key
code.
Code 51±58 is output.1. Hibrid vehicle control ECU
2. Transponder key ECU

The engine dose not starting?
Is DTC code 21, 22 output?

Wire harness faulty (Open circuit)

Transponder key EUC faulty
NoYe s
Is DTC code 31, 32, 33
output?
No

Check the wire harness and connector between the
hybrid vehicle control ECU and transponder key ECU.

Check that wire harness and connector between the
engine ECU and transponder key ECU.
DTC 31 Go to (a)
DTC 32 Go to (b)
DTC33 Go to (C)
Register the transponder key again.If it cannot be registered (due to chip failure), replace the key.
Hybrid vehicle immobiliser system is normal.
NG
OK
± BODY ELECTRICALHYBRID VEHICLE IMMOBILISER SYSTEM
BE±113
2001 PRIUS (RM778U)
4. TROUBLE SHOOTING

If code 31 is output, troubleshoot according to this flow chart.

Can the engine be started with any other key of the vehicle?
YESNO
Does continuity exist in the coil in continuity test?
Replace the AMP and check if it starts?
Does continuity exist in W/H in continuity test?Replace the coil (Coil broken)Replace the key (Chip failure)
Replace the AMP (AMP failure)
Replace the Transponder key ECU
(Transponder key ECU failure)
Repair or replace the wire harness or the connector.
YES NO YES
NO
YES
NO
Can the engine be started with any other key of the vehicle?
Replace the AMP and check if it starts?
Replace the key (Chip failure)
Replace the Transponder key ECU
(Transponder key ECU failure)YES
NO
Replace the AMP (AMP failure)YES
NO BE±114
± BODY ELECTRICALHYBRID VEHICLE IMMOBILISER SYSTEM
2001 PRIUS (RM778U)

If code 32 is output, troubleshoot according to this flow chart.

If code 33 is output, troubleshoot according to this flow chart.

BE0FZ±14
I17863
I11734
BE3907
± BODY ELECTRICALHORN SYSTEM
BE±117
2001 PRIUS (RM778U)
INSPECTION
1. INSPECT HORN SWITCH
(a) Disconnect the negative (±) terminal from the battery.
(b) Remove the left and right covers from the steering wheel.
(c) Using a torx socket wrench, loosen the 2 bolts.
(d) Pull up the horn pad and place it on the steering column,
as shown.
HINT:
Do not disconnect the connector from the horn pad.
(e) Disconnect the connector from the slip ring.
(f) Check that no continuity exists between terminal 6 of the
connector and body ground.
(g) Check that continuity exists between terminal 6 of the
connector and body ground when the horn contact plate
is pressed against the steering spoke assembly.
If continuity is not as specified, repair or replace the steering
wheel or wire harness as necessary.
(h) Install the horn pad in place and using a torx socket
wrench, torque the 2 bolts.
Torque:
7.1 N´m (72 kgf´cm, 62 in.´lbf)
(i) Install the left and right covers.
(j) Connect the negative (±) terminal to the battery.
2. INSPECT HORN OPERATION
Connect the positive (+) lead from the battery to the terminal
and negative (±) lead to the horn body and check that the horn
blows.
If operation is not as specified, replace the horn.

I01200
2 1
35
2 5
1 3
BE±118
± BODY ELECTRICALHORN SYSTEM
2001 PRIUS (RM778U)
3. INSPECT HORN RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 ± 2Continuity
Apply B+ between
terminals 1 and 2.3 ± 5Continuity
If continuity is not as specified, replace the relay.

BO0ZO±06
V00005
Shape (Example) Removal/Installation
Clip RemoverPliers
Screwdriver
Scraper
± BODYCLIP
BO±1
1786 Author: Date:
2001 PRIUS (RM778U)
CLIP
REPLACEMENT
The removal and installation methods of typical clips used in body parts are shown in the table below.
HINT:
If the clip is damaged during the operation, always replace it with a new clip.

V00012
Shape (Example)
Removal/Installation
Removal
Installation Removal Installation BO±2
± BODYCLIP
1787 Author: Date:
2001 PRIUS (RM778U)