2001 TOYOTA PRIUS fuse

BE1UT±01
I01856
Ground
Power Source
(Illumination) E
ILL
B
ACCPower Source
(System Operation)
Power Source
(Display Operation)
2
3
4Connector:
Clock Side:Wire Harness Side:
1 CLOCK WILL NOT OPERATE
I01857
B + GND
e±4±2±D e±4±1±D
Clock Side:
Wire Harness Side:
Ye s
Ye sNo
No
Is there battery positive voltage between terminal +B and body
ground.
Is there continuity between terminal GND and body ground.
Replace clock.Open or short circuit in wire harness between terminal
+B and DOME fuse.
Open or short circuit in wire harness between terminal
GND and DOME fuse.
BE±102
± BODY ELECTRICALCLOCK
1769 Author: Date:
2001 PRIUS (RM778U)
CLOCK
TROUBLESHOOTING
HINT:
Troubleshoot the clock according to the table below.
TroubleshootingNo.
Clock will not operate1
Clock loses or gains time2
± 1.5 seconds / day
1. TROUBLESHOOTING No.1
(a) Check that the battery positive voltage is 10 ± 16 V.
If voltage is not as specified, replace the battery.
(b) Check that the DOME fuse is not blown.
If the fuse is blown, replace the fuse and check for short.
(c) Troubleshoot the clock as follows.
HINT:
Inspect the connector on the wire harness side.

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

H15447
Defroster Nozzle
J
J
JJ
J
J
J
No. 2 Side Defroster Nozzle
No. 2 Side
Defroster Nozzle
No. 1 Heater to Register Duct
No. 2 Instrument Panel
Cushion
No. 3 Instrument
Panel Cushion
No. 4 Instrument
Panel Cushion Navigation Antenna
J
J
J
JJ
J
No. 1 Instrument Panel
CushionM
No. 1 Pin
M
No. 1 Pin
J
Center
Bracket Fuse Box Opening Cover
Instrument Panel Wire
No. 1 Safty Pad
No. 2 Safty PadM
M
MM
MMM
M
M
M
MM
M
BO±60
± BODYINSTRUMENT PANEL
1845 Author: Date:
2001 PRIUS (RM778U)