2009 TOYOTA CAMRY HV horn

330 4-3. Do-it-yourself maintenance
20 EFI NO.310 AFuel tank system, multiport fuel
injection system/sequential multi-
port fuel injection system
21 IGCT No.2 10 A Hybrid system ECU, motor genera-
tor ECU
22 INV W/P 15 AHybrid system ECU, hybrid battery
(traction battery), DC/DC converter,
multiport fuel injection system/
sequential multiport fuel injection
system
23 S-HORN 7.5 A No circuit
24 A/F 20 A No circuit
25 MPX-B 10 A Gauges and meters
26 EFI NO.1 10 A Smart key system
27 HORN 10 A Horns
28 H-LP(RL) 15 A Right-hand headlight (low beam)
29 H-LP(LL) 15 A Left-hand headlight (low beam)
30 H-LP(RH) 15 A Right-hand headlight (high beam)
31 H-LP(LH) 15 A Left-hand headlight (high beam)
32 HTR 50 A Air conditioning system
33 HTR SUB2 50 A PTC heater
34 HTR SUB1 50 A PTC heater
35 RR DEF 50 ARear window defogger, “MIR HTR”
fuse
36 CDS FAN 40 A Electric cooling fan
37 RDI FAN 40 A Electric cooling fan
FuseAmpereCircuit

378
5-2. Steps to take in an emergency
If the hybrid system will not start
Reasons for the hybrid system not starting vary depending on the
situation. Check the following a nd perform the appropriate proce-
dure:
■ The hybrid system will not start, even though the correct
starting procedure is being followed. ( →P. 131)
One of the following may be the cause of the problem.
● The electronic key may not be functioning properly. ( →P. 382)
● There may be a malfunction in the immobilizer system.
(→ P. 8 3 )
● There may be a malfunction in the steering lock system.
● The hybrid system may be malfun ctioning due to an electrical
problem such as an open circuit or a blown fuse. However,
depending on the type of malf unction, an interim measure is
available to start the hybrid system. ( →P. 379)
■ The interior lights and headlight s are dim, or the horn does
not sound or sounds at a low volume.
One of the following may be the cause of the problem.
● The 12-volt battery may be discharged. ( →P. 385)
● The 12-volt battery terminal c onnections may be loose or cor-
roded.

5
When trouble arises
379
5-2. Steps to take in an emergency
Emergency start function
When the hybrid system does not
start, the following steps can be
used as an interim measure to start the hybrid system if the
“POWER” switch is functioning normally.
Set the parking brake.
Shift the shift lever to P.
Turn the “POWER” switch to ACCESSORY mode.
Press and hold the “POWER” switch for about 15 seconds
while depressing the brake pedal firmly.
Even if the hybrid sy stem can be started usi ng the above steps, the
system may be malfunctioning. Ha ve the vehicle checked by your
Toyota dealer.
■ The interior lights and headlights do not turn on, or the horn
does not sound.
One of the following may be the cause of the problem.
●One or both of the 12-volt ba ttery terminals may be discon-
nected.
● The 12-volt battery may be discharged. ( →P. 385)
● There may be a malfunction in the steering lock system.
Contact your Toyota dealer if the problem cannot be repaired, or if
repair procedures are unknown.
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