2001 TOYOTA PRIUS clock

BE±10
± BODY ELECTRICALTROUBLESHOOTING
1677 Author: Date:
2001 PRIUS (RM778U) Even when the system is not set
(Headlights stay on).
Headlight control relay circuitDI±697
Even when the system is not set
(Taillights stay on).Taillight control relay circuitDI±691
WIRELESS DOOR LOCK CONTROL SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
HINT:
Troubleshooting of the wireless door lock control system is based on the premise that the door lock
control system is operating normally. Accordingly, before troubleshooting the wireless door lock control
system, first make certain that the door lock control system is operating normally.
If the trouble still reappears even though there are no abnormalities in any of the other circuits, then
check and replace the Wireless Door Lock Control Receiver as the last step.
SymptomSuspect AreaSee page
All functions of wireless door lock control system do not operate.
1. Transmitter
2. Wireless Door Lock Control Receiver
3. Wire Harness
4. Body ECUBE±83
BE±83
±
DI±678
POWER MIRROR CONTROL SYSTEM
SymptomSuspect AreaSee page
Both right and left mirrors do not operate.
1. ACC Fuse
2. ACC Relay
3. Mirror Switch
4. Wire HarnessBE±12
BE±12
BE±93
±
Only one side of mirror does not operate.1. Mirror Motor
2. Wire HarnessBE±93
±
AUDIO SYSTEM
SymptomSuspect AreaSee page
Audio system abnormal operation.TROUBLESHOOTINGBE±97
CLOCK SYSTEM
SymptomSuspect AreaSee page
Clock will not operate.TROUBLESHOOTING NO.1BE±102
Clock loses or gains time.TROUBLESHOOTING NO.2BE±102
HYBRID BEHICLE IMMOBILIZER SYSTEM
SymptomSuspect AreaSee page
Hybrid vehicle immobilizer system does not operate.Pre±checkBE±111

Z05930
1
2
3
5 1
5
2 3
I1535121
I1535221
I15353
2
1
I153542
1
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE±57
2001 PRIUS (RM778U)
5. INSPECT POWER MAIN 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.
6. Driver 's door:
INSPECT POWER WINDOW MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (±) lead to terminal 2, check that the
motor turns clockwise.
(b) Reverse the polarity, check that the motor turns counter-
clockwise.
If operation is not as specified, replace the motor.
NOTICE:
Since the jam protection may not work properly be sure to
conduct procedures described in ºHOW TO RESET POW-
ER MOTOR (RESET AND PULSE SWITCH)º after this in-
spection.
7. Passenger 's door and rear right door:
INSPECT POWER WINDOW MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (±) lead to terminal 2, check that the
motor turns clockwise.
(b) Reverse the polarity, check that the motor turns counter-
clockwise.
If operation is not as specified, replace the motor.

I15357
2
1
I15358
2
1
I14317
21
I1431821
I14319
21
BE±58
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
2001 PRIUS (RM778U)
8. Rear left door:
INSPECT POWER WINDOW MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (±) lead to terminal 2, check that the
motor turns clockwise.
(b) Reverse the polarity, check that the motor turns counter-
clockwise.
If operation is not as specified, replace the motor.
9. Driver 's door:
INSPECT PTC OPERATION
(a) Disconnect the connector from the window motor.
(b) Connect the positive (+) lead from the ammeter to termi-
nal 1 of the wire harness side connector and the negative
(±) lead to negative terminal of the battery.
(c) Connect the positive (+) lead from the battery to terminal
2 of the wire harness side connector, and raise the win-
dow to the fully closed position.
(d) Continue to apply voltage, check that the current changes
from approximately 14 A to less than 1 A within 4 to 90 se-
conds.
(e) Disconnect the leads from terminals.
(f) Approximately 90 seconds later, connect the positive (+)
lead from the battery to terminal 1 and negative (±) lead
to terminal 2, check that the window begins to descend.
If operation is not as specified, replace the motor.
10. Except driver's door:
INSPECT PTC OPERATION
(a) Disconnect the connector from the power window switch.
(b) Connect the positive (+) lead from the ammeter to termi-
nal 1 of the wire harness side connector and the negative
(±) lead to negative terminal of the battery.
(c) Connect the positive (+) lead from the battery to terminal
2 of the wire harness side connector, and raise the win-
dow to the fully closed position.

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.

2 CLOCK LOSES OR GAINS TIME
I01858
Wire Harness SideClock Side
B+ GND
Ye s
Is there battery voltage between terminal +B and
body ground?
Adjust or replace clock.Bellow 10 V
Locate cause and repair, or recharge battery.
Ye s
Is there battery voltage between terminal ACC and
body ground?Bellow 10 V
Locate cause and repair, or recharge battery.
± BODY ELECTRICALCLOCK
BE±103
1770 Author: Date:
2001 PRIUS (RM778U)
2. TROUBLESHOOTING NO.2
(a) Check that the battery positive voltage is 10 ± 16 V.
If voltage is not as specified, replace the battery.
(b) Inspect the error of the clock.
Allowable error (per day): ± 1.5 seconds
If the error exceeds the allowable error, replace the clock.
(c) Check that the clock adjusting button is sticking in posi-
tion and has failed to return.
If the error exceeds the allowable error, replace the clock.
(d) Troubleshoot the clock as follows.
HINT:
Inspect the connector on the wire harness side.