2005 TOYOTA AVENSIS sensor

F44868
Power Steering ECU Assy Torque Sensor
TRQV
TRQ1
TRQ2
TRQG 6
5
7
8
± DIAGNOSTICSELECTRONIC MOTOR POWER STEERING SYSTEM
05±1059
AVENSIS REPAIR MANUAL (RM1018E)
DTC C1511/11 Torque Sensor Circuit Malfunction
DTC C1512/12 Torque Sensor Circuit Malfunction
DTC C1513/13 Torque Sensor Circuit Malfunction
DTC C1514/14 Torque Sensor Power Source Circuit
Malfunction
DTC C1517/17 Torque Sensor Hold Malfunction
CIRCUIT DESCRIPTION
The torque sensor converts the power input in the steering wheel into electric signals, and sends them to
the ECU.
DTC No.DTC Detecting ConditionTrouble Area
C1511/11
C1512/12Torque sensor circuit malfunction
C1513/13
q
Steering column assy

Power steering ECU assy
C1514/14Torque sensor power source circuit malfunction

Power steering ECU assy
C1517/17Torque sensor hold malfunction
WIRING DIAGRAM
05C5H±01

05±1060
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
NOTICE:
When performing the inspection of power steering ECU, ECU must be instal\
led to the vehicle or fully
fixed.
HINT:
Start the inspection from the step 1 with using hand±held tester. Start from step 2 without using hand±held
tester.
1READ VALUE OF HAND±HELD TESTER
(a)Connect the hand±held tester to the DLC3.
(b)Turn the ignition switch to ON and push the hand±held tester main swit\
ch ON.
(c)Select the item ºTRQ1º and ºTRQ2º in the DATA LIST and read its value displayed on the hand±held tester.
(d)Check the values on the ºTRQ1º and ºTRQ2º of the data monito\
r with the steering wheel being in the center value position (no load).
Standard:
2.3 to 2.7 V
(e)Check the difference of the values between ºTRQ1º and ºTRQ2º with the steering wheel being in the center value position (no load).
Standard:
Voltage: 0.3 V or less
(f)Check the values of the torque sensor on the data monitor when turning s\
teering wheel. (1)Turn the steering wheel to the right end from the center value position, and check the values on\
the ºTRQ1º and ºTRQ2º of the data monitor.
Standard:
2.5 to 4.7 V
(2)Turn the steering wheel to the left end from the center value position, and \
check the values on the ºTRQ1º and ºTRQ2º of the data monitor.
Standard:
0.3 to 2.5 V
(3)Check the difference of the values between ºTRQ1º and ºTRQ2º.
Standard:
Voltage: 0.3 V or less
NGGo to step 3
OK
REPLACE POWER STEERING ECU ASSY (See page 50±20)

F44304
TRQG (±)TRQ1 (+)Connector BTRQ2 (+)
F44304
TRQG (±) TRQV (+)
Connector B
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
05±1061
AVENSIS REPAIR MANUAL (RM1018E)
2INSPECT STEERING COLUMN ASSY(TORQUE SENSOR)
(a)Measure the voltage between terminals TRQ1 and
TRQG, TRQ2 and TRQG of power steering ECU assy
connector.
Standard:
Steering positionTRQ1TRQ2
Center position2.3 to 2.7 V2.3 to 2.7 V
Right turned2.5 to 4.7 V2.5 to 4.7 V
Left turned0.3 to 2.5 V0.3 to 2.5 V
OKREPLACE POWER STEERING ECU ASSY (See page 50±20)
NG
3INSPECT POWER STEERING ECU ASSY
(a)Measure the voltage between terminals TRQV and TRQG of power steering ECU assy connector.
Standard:
7.5 to 8.5 V
OKREPLACE STEERING COLUMN ASSY (See page 50±9)
NG
REPLACE POWER STEERING ECU ASSY (See page 50±20)

050WM±04
05±1054
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DIAGNOSTIC TROUBLE CODE CHART
HINT:

Using SST 09843±18040, connect terminals Tc and CG of the DLC3.

If a malfunction code is displayed during the DTC check, check the circuit\
listed for the code. For details
of each code, proceed the page referred to under the ºSee pageº for \
respective ºDTC No.º in the DTC
chart.
DTC No.
(See page)Detection ItemTrouble Area
C1511/11
(05±1059)
C1512/12
(05±1059)Torque sensor circuit malfunction
Steering column assy
C1513/13
(05±1059)
Steering column assy

Power steering ECU assy
C1514/14
(05±1059)Torque sensor power source circuit malfunction
C1515/15
(05±1062)Calibration of torque sensor zero point is not performedSensor zero point calibration is not preformed.
C1516/16
(05±1063)Calibration of torque sensor zero point is not completedSensor zero point calibration failure.
C1517/17
(05±1059)Torque sensor hold malfunction
Steering column assy

Power steering ECU assy
C1523/23
(05±1064)
Motor circuit malfunction
Steering column assy
C1524/24
(05±1064)Motor circuit malfunctionSteering column assy

Power steering ECU assy
C1531/31
(05±1066)
C1532/32
(05±1066)
Power steering ECU assy malfunctionPower steering ECU assyC1533/33
(05±1066)Power steering ECU assy malfunctionPower steering ECU assy
C1534/34
(05±1066)
C1541/41
(05±1067)
Speed sensor malfunction

Speed sensor

Speed sensor circuit

Skid control ECUC1542/42
(05±1067)Speed sensor malfunction
Skid control ECU

Combination meter assy

Power steering ECU assy
C1544/44
(05±1070)
Engine revolution signal malfunction

Engine revolution signal circuit
ECMC1545/45
(05±1070)Engine revolution signal malfunction
ECM

Power steering ECU assy
C1551/51
(05±1073)IG power source circuit malfunction

ECU±IG fuse

Power steering relay

IG power source circuit

Charging system

Power steering ECU assy
C1552/52
(05±1076)PIG power source circuit malfunction
EMPS fuse

EMPS rela
y
C1554/54
(05±1076)EMPS relay circuit malfunction

EMPS relay

PIG power source circuit

Power steering ECU assy

C52361
DLC3:
CGTs 05±1046
± DIAGNOSTICSELECTRONIC MOTOR POWER STEERING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
(b) Clearing the DTCs using the SST check wire.
SST 09843±18040
(1) Using SST, connect terminals Ts and CG of the
DLC3.
(2) Turn the ignition switch to ON.
(3) Disconnect and connect the SST check wire from
the CG terminal 4 times or more in 8 seconds end-
ing with it connected.
(4) Check that the P/S warning light blinks a normal
code.
(5) Turn the ignition switch to OFF.
(6) Remove the SST from the DLC3.
SST 09843±18040
3. DTC CHECK (USING HAND±HELD TESTER)
(a) Checking DTCs using the hand±held tester.
(1) Connect the hand±held tester to the DLC3.
(2) Turn the ignition switch to ON.
(3) Read the DTCs by following the prompts on the tes-
ter screen.
HINT:
Refer to the hand±held tester operator's manual for further de-
tails.
(b) Clearing the DTCs using the hand±held tester.
(1) Connect the hand±held tester to the DLC3.
(2) Turn the ignition switch to ON.
(3) Clear the DTCs by following the prompts on the tes-
ter screen.
HINT:
Refer to the hand±held tester operator's manual for further de-
tails.
4. DATA LIST AND FREEZE FRAME DATA
HINT:
Ignition switch must be turned ON, and the vehicle should be placed on a leveled ground to observe data
by using a hand±held tester.
Data List (*: with freeze frame data):
ItemMeasurement Item / Range (Dis-
play)Normal ConditionDiagnostic Note
TRQ1 (*)
Show the output states in the
torque sensor /
Min.: 0 V, Max.: 5 V
Steering wheel center position:
2.3 to 2.7 V
Steering wheel right turned:
2.5 to 4.7 V
Steering wheel left turned:
0.3 to 2.5 V
±
TRQ2 (*)
Show the output states in the
torque sensor /
Min.: 0 V, Max.: 5 V
Steering wheel center position:
2.3 to 2.7 V
Steering wheel right turned:
2.5 to 4.7 V
Steering wheel left turned:
0.3 to 2.5 V
±

± DIAGNOSTICSELECTRONIC MOTOR POWER STEERING SYSTEM
05±1047
AVENSIS REPAIR MANUAL (RM1018E)ItemDiagnostic Note Normal Condition Measurement Item / Range (Dis-
play)
TRQ3 (*)
Show the output states in the
torque sensor /
Min.: 0 V, Max.: 5 V
Steering wheel center position:
2.3 to 2.7 V
Steering wheel right turned:
2.5 to 4.7 V
Steering wheel left turned:
0.3 to 2.5 V
±
SPD (*)
Show the vehicle speed on the
speedometer /
Min.: 0 km/h (0 mph),
Max.: 255 km/h (158 mph)
Actual vehicle speedVehicle speed indicated on
speedometer
ENGINE REV (*)
Show the engine revolution /
Min.: 0 rpm
Max.: 8,192 rpm
Actual engine speed±
MOTOR ACTUAL (*)Show the current flowing motor /
Min.: ±128 A, Max.: 128 A0 to 65 A±
COMMAND VALUE (*)Show the specified current value /
Min.: ±128 A, Max.: 128 A0 to 65 A±
THERMISTOR TEMP (*)
Show the temperature of the
thermistor /
Min.: ±50
C, Max.: 205
C
±±
PIG SUPPLY (*)
Show the power supply voltage for
driving motor /
Min.: 0 V, Max.: 25 V
10 to 16 VWhile power steering operated
IG SUPPLY (*)Show the power supply condition /
Min.: 0 V, Max.: 25 V10 to 16 V±
TRQ1 ZERO VAL (*)Show the torque sensor/
Min.: 0 V, Max.: 5 VSteering wheel center position:
2.3 to 2.7 V±
TRQ2 ZERO VAL (*)Show the torque sensor/
Min.: 0 V, Max.: 5 VSteering wheel center position:
2.3 to 2.7 V±
TRQ3 ZERO VAL (*)Show the torque sensor/
Min.: 0 V, Max.: 5 VSteering wheel center position:
2.3 to 2.7 V±
MTR OVERHEAT
Record of continuous overheat
preventive control /
record or un±record
Un±record±
MTR LOW POWERRecord of low motor power supply
voltage / record or un±recordUn±record±
MTR HIGH POWERRecord of high motor power sup-
ply voltage / record or un±recordUn±record
#CODESNumber of DTC recorded /
Min.: 0, Max.: 255Min.: 0, Max.: XX±
ASSIST MAPShow the selected condition of the
assist map / 01, 02, 03, 11 or 12±±
ECU IDShow the identified information of
ECU / 01, 02, 03, 04 or 05±±
TEST MODE STATTest mode status / NORMAL or
TESTNORMAL: Normal mode
TEST: During test mode±

C52361
DLC3:CGTs
Tc
F42646
Malfunction Code (Example Code 73)
7 3
ON
OFF
0.5 sec.
0.5 sec.
0.5 sec. 4 sec.
Repeat
0.5 sec.
ON
OFF
0.25 sec.
0.25 sec.
Normal Code
A Cycle 1.5 sec.
05±1048
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
5.INPUT SIGNAL CHECK (TEST MODE) (USING SST CHECK WIRE)
(a)Check the input signal using a SST check wire.
(1)Using SST, connect terminals Ts and CG of DLC3.
SST09843±18040
(2)Turn the ignition switch to ON.
(3)Check that the PS warning light shows the normalcode.
(4)Check that the PS warning light goes off while driv- ing the vehicle more than 10 km/h (6 mph) and the
engine speed more than 300 rpm.
HINT:
If the PS warning light goes off during driving, the sensor is
judged to be normal.
(5)Stop the vehicle.
(6)Using SST, connect terminals Tc and CG of DLC3.
SST09843±18040
(7)Read the number of blinks of the PS warning light.
HINT:

See the list of DTC shown in the table below.

Even if a sensor is normal, it output codes 71 and 73 dur-
ing test mode.
DTC of input signal check function:
Code No.
(See page)DiagnosisTrouble Area
C1571/71
(05±1067)Speed sensor signal check 1 (Test mode)

Speed sensor

Speed sensor circuit

Skid control ECU assy

Combination meter assy

Power steering ECU assy
C1573/73
(05±1070)Engine revolution signal check (Test mode)

Engine revolution signal circuit

ECM

Power steering ECU assy
(8) After checking, disconnect the SST from the termi-
nal Ts and CG, Tc and CG of DLC3, and turn the
ignition switch to OFF.
SST 09843±18040

C52361
DLC3:CGTs
Tc
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
05±1049
AVENSIS REPAIR MANUAL (RM1018E)
6.INPUT SIGNAL CHECK (TEST MODE)
(USING HAND±HELD TESTER)
(a)Check the input signal using the hand±held tester.
(1)Connect the hand±held tester to the DLC3.
(2)Check that the warning light goes off with driving thevehicle more than 10 km/h (6 mph) and engine
speed more than 300 rpm.
(3)Read the DTC by following the prompts on the tes- ter screen.
HINT:

Refer to the hand±held tester operator's manual for fur-
ther details.

See the list of DTC shown in the table below.

Even if a sensor is normal, it outputs codes C1571/71 and
C1573/73 during test mode.
DTC of input signal check function:
Code No.
(See page)DiagnosisTrouble Area
C1571/71
(05±1067)Speed sensor signal check 1 (Test mode)

Speed sensor

Speed sensor circuit

Skid control ECU assy

Combination meter assy

Power steering ECU assy
C1573/73
(05±1070)Engine revolution signal check (Test mode)

Engine revolution signal circuit

ECM

Power steering ECU assy
7. CALIBRATION OF TORQUE SENSOR ZERO POINT
(USING SST CHECK WIRE)
HINT:
Perform this operation in the following cases.

When removing and installing ºsteering wheel assemblyº,
ºtilt steering column assemblyº and ºsteering gear assem-
blyº.

When replacing power steering ECU assy.
(a) Place front wheels and steering wheel facing straight ahead.
(b) Perform the torque sensor zero point initialization.
HINT:
If the power steering ECU assy is replaced, initialization is not
necessary. (1) Stop the vehicle and turn the ignition switch OFF.
(2) Using SST, connect terminals Ts and CG of DLC3.
SST 09843±18040
(3) Using SST, connect terminals Tc and CG of DLC3.
SST 09843±18040
(4) Turn the ignition switch ON.