2005 TOYOTA AVENSIS brakes

± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±115
AVENSIS REPAIR MANUAL (RM1018E)
DTC P1520 STOP LIGHT SWITCH CIRCUIT
MALFUNCTION
CIRCUIT DESCRIPTION
This signal is used to detect that the brakes have been applied. The STP signal voltage is the same as the
one supplied to the stop lights.
The STP signal is used mainly to control the fuel cut±off engine speed (The fuel cut±off engine speed is re-
duced slightly when the vehicle is braking.).
DTC No.DTC Detecting ConditionTrouble Area
P1520
Condition (a), (b) and (c) continue for 0.5 sec. or more:
(a) Ignition switch ON
(b) Brake pedal released
(c) STP signal is OFF when the STP signal is OFF
Open or short in stop light switch signal circuit

Stop light switch

ECM
05B48±02

F45135
B±R
DH DA18 2Driver Side J/B
IGNEBDW S212
IE118 4
B±W
C11 C11Combination Meter
BrakeSkid Control ECU
with Actuator
P P 22
17
C10
AM2
4B 4A11IG2
A 1
2 AM2
3
IK 1A
Engine Room R/B No.3 Engine Room R/B No.1 & Engine Room J/B No.1
1
3 Engine Room J/B No.41
IO ILJ15
J/C
Battery
*1: Gasoline
*2: 1CD±FTV
*3: LHD
*4: RHD(*3) (*4) (*3) (*4)B±W CA CA
J8 J26 J8 J26J/C
B±R
IE4 IP111
(*3) (*4) B±R
B (*2)B±G (*1)
B (*2)
FL MAINB±G (*1)
W±B (*3 *2)
W±B (*3 *1)A A
AAJ17
J/C
J16
J/C W±B
(*3) W±B (*4)
W±B (*4)
I13
Ignition SW
46
± DIAGNOSTICSABS WITH EBD SYSTEM
05±745
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM

05±746
±
DIAGNOSTICS ABS WITH EBD SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1RECONFIRM DTC
(a)Check the DTC (See page 05±699). OK:
Normal code
NGREPAIR CIRCUIT INDICATED BY OUTPUTCODE
OK
2INSPECT PARKING BRAKE SWITCH CIRCUIT
(a)Check for an open or short circuit in the parking brake switch circuit (See page 01±32). NGREPAIR OR REPLACE PARKING BRAKESWITCH CIRCUIT
OK
3INSPECT BRAKE FLUID LEVEL WARNING SWITCH CIRCUIT
(a)Check the brake fluid level in reservoir.
(b)Check for an open or shot circuit in brake fluid level warning switch ci\
rcuit (See page 01±32). NG REPAIR OR REPLACE BRAKE FLUID LEVELWARNING SWITCH CIRCUIT
OK
4 INSPECT VACUUM WARNING SWITCH CIRCUIT
(a) Check for an open or short circuit in harness and connector between the vacuum warning switch and skid control ECU (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
5 INSPECT COMBINATION METER ASSEMBLY(BRAKE WARNING LIGHT CIRCUIT)
(a)Check for an open or short circuit in the combination meter (See page 01±32). NG REPAIR OR REPLACE COMBINATION METERASSEMBLY
OK

± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±905
AVENSIS REPAIR MANUAL (RM1018E)
STOP LIGHT SWITCH SIGNAL CIRCUIT
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while driving in lock±up condition, when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signals to the ECM. Then the ECM cancels the op-
eration of the lock±up clutch while braking is in progress.
05C91±01

±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FSE))05±947
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0724BRAKE SWITCH ºBº CIRCUIT HIGH
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while dr\
iving in lock±up condition, when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends signals to the ECM. Then\
the ECM cancels the opera-
tion of the lock±up clutch while braking is in progress.
DTC No.DTC Detecting ConditionTrouble Area
P0724The stop light switch does not turn off even once the vehicle is
driven (2±trip detection logic).
Short in stop light switch signal circuit

Stop light switch

ECM
WIRING DIAGRAM
See page 05±475.
INSPECTION PROCEDURE
1 INSPECT STOP LAMP SWITCH ASSY
NG REPLACE STOP LAMP SWITCH ASSY
OK
2 CHECK HARNESS AND CONNECTOR(STOP LAMP SWITCH ASSY ± ECM)
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
REPAIR OR REPLACE ECM
05C9A±01

05±1018±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U341E)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP1520STOP LIGHT SWITCH CIRCUIT MALFUNCTION
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while dr\
iving in lock±up condition, when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends signals to the ECM. Then\
the ECM cancels the opera-
tion of the lock±up clutch while braking is in progress.
DTC No.DTC Detection ConditionTrouble Area
P1520Stop light switch remains ON while vehicle running (1±trip
detection logic)
Short in stop lamp switch signal circuit

Stop lamp switch

ECM
WIRING DIAGRAM
See page 05±115.
INSPECTION PROCEDURE
1 INSPECT STOP LAMP SWITCH ASSY
NG REPLACE STOP LAMP SWITCH ASSY
OK
2 CHECK HARNESS AND CONNECTOR(STOP LAMP SWITCH ASSY ± ECM)
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM
05C8K±01

300JY±01

F45751
SST
C80291
F44775
C67088
30±22
±
DRIVE SHAFT / PROPELLER SHAFT FRONT AXLE HUB SUB±ASSY LH
AVENSIS REPAIR MANUAL (RM1018E)
REPLACEMENT
HINT:
Replace the RH side by the same procedures as the LH side.
1. REMOVE FRONT WHEEL
2.SEPARATE FRONT STABILIZER LINK ASSY LH (See page 30±6) 3. REMOVE FRONT AXLE HUB LH NUT
(a) Using SST and a hammer, unstake the staked part of theaxle hub LH nut.
SST 09930±00010
(b) While applying the brakes, remove the axle hub LH nut.
4. DISCONNECT SPEED SENSOR FRONT LH
(a) Remove the bolt, and disconnect the speed sensor wire and flexible hose from the shock absorber.
(b) Remove the bolt, separate the speed sensor front LH from the steering knuckle.
NOTICE:

Be careful not to damage the speed sensor.

Prevent foreign matter from attaching to the speed
sensor.
5. SEPARATE FRONT DISC BRAKE CALIPER ASSY LH
(a) Removing the 2 bolts, separate the disc brake caliper assy LH from the steering knuckle.
NOTICE:
Use a string or other device to keep the brake caliper from
hanging down.

C68609
30±28
±
DRIVE SHAFT / PROPELLER SHAFT FRONT AXLE HUB SUB±ASSY LH
AVENSIS REPAIR MANUAL (RM1018E)
34. INSTALL FRONT AXLE HUB LH NUT
(a) While applying the brakes, install a new axle hub LH nut. Torque: 216 N
m (2,200 kgf
cm, 159 ft
lbf)
(b) Using a chisel and hammer, stake the axle hub LH nut.
35. INSTALL FRONT WHEEL Torque: 103 N
m (1,050 kgf
cm, 76 ft
lbf)
36.INSPECT AND ADJUST FRONT WHEEL ALIGNMENT (See page 26±6)
37. CHECK ABS SPEED SENSOR SIGNAL
(a)ABD WITH EBD SYSTEM (See page 05±699)
(b)ABD WITH EBD & BA & TRC & VSC SYSTEM ( See page 05±756)