2005 TOYOTA AVENSIS MOTOR

F44865
Combination Meter Power Steering ECU
C11V±W 18
SPD J10H
J10H
J20H
J20H
E155
V±W
(*1) (*2) (*1) (*2)
*1: LHD
*2: RHDJ/C
± DIAGNOSTICSELECTRONIC MOTOR POWER STEERING SYSTEM
05±1067
AVENSIS REPAIR MANUAL (RM1018E)
DTC C1541/41 Speed Sensor Malfunction
DTC C1542/42 Speed Sensor Malfunction
DTC C1571/71 Speed Sensor Malfunction (Test mode)
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1541/41
Speed sensor malfunction

Speed sensor

Speed sensor circuit
C1542/42
Speed sensor malfunction
Speed sensor circuit

Skid control ECU assy
Cbiti tC1571/71Speed sensor malfunction (Test mode)
Combination meter assy

Power steering ECU assy
WIRING DIAGRAM
0579L±02

05±1068
±
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 turn the hand±held tester main swi\
tch to ON.
(c)Select the item ºSPDº in the DATA LIST and read its value displayed on the hand±held tester.
(d)Check that there is no difference between the speed value output from the speedometer displayed by the hand±held tester and the speed value displayed by the speedometer wh\
en driving the vehicle.
OK:
There is almost no difference in the displayed speed values.
HINT:
There is tolerance of
10 % in the speedometer indication.
OKREPLACE POWER STEERING ECU ASSY(Seepage 50±20)
NG
2 CHECK DIAGNOSTIC CODE OUTPUT
(a) Check that DTC for brake system output the normal code. NG REPAIR CIRCUIT INDICATED BY OUTPUTCODE
OK

F44304
PGNDE14SPD
E15


A05135
5 V/
Division
20 ms/Division
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
05±1069
AVENSIS REPAIR MANUAL (RM1018E)
3INSPECT POWER STEERING ECU ASSY(METER SPEED SIGNAL)
(a)Turn the ignition switch ON.
(b)Connect an oscilloscope to terminals SPD and PGND of
the power steering ECU assy connector.
(c)Driving at about 20 km/h (12 mph), check the signal wave- form.
Standard:
Signal waveform as shown in the illustration.
HINT:
As the vehicle speed becomes high, the waveform cycle nar-
rows.
OKREPLACE POWER STEERING ECU ASSY(See page 50±20)
NG
4 CHECK HARNESS AND CONNECTOR(POWER STEERING ECU ASSY ± COMBINATION METER ASSY)
(a) Check for an open or short circuit in harness and connector between powe\
r steering ECU assy and
combination meter assy (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
GO TO COMBINATION METER SYSTEM(See page 05±1510)

05±1066
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTCC1531/31EMPS ECU Circuit Malfunction
DTCC1532/32EMPS ECU Circuit Malfunction
DTCC1533/33EMPS ECU Circuit Malfunction
DTCC1534/34EMPS ECU Circuit Malfunction
DTCC1581/81Assist Map Un±written
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1531/31
C1532/32PoersteeringECUassmalfnctionC1533/33Power steering ECU assy malfunctionPower steering ECU assy
C1534/34
gy
C1581/81Assist map un±written
INSPECTION PROCEDURE
1RECONFIRM DTC
(a)Check the DTCs (See page 05±1045).
(b) Is DTC except for C1531/31, C1532/32, C1533/33, C1534/34 and/or C1581/81\
output? YES REPAIR CIRCUIT INDICATED BY OUTPUTCODE
NO
REPLACE POWER STEERING ECU ASSY (See page 50±20)
050WS±04

I35378
A23
Air Mix Control Servo Motor (Driver Side) A/C Control Assembly
M
MAX
HOT4P±L
A15 AMDH12
MAX
COOL5B
A15 AMDC11
PT 3GR
A16 TPD8
VZ 2Y±B
A16 S5±22
GND 1Y±R
A15 SG±214
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1139
AVENSIS REPAIR MANUAL (RM1018E)
DTC 46 AIR MIX DAMPER CONTROL SERVOMOTOR
CIRCUIT (DRIVER SIDE)
CIRCUIT DESCRIPTION
The air mix damper servo sub±assy is controlled by the A/C amplifier and moves the air mix damper to the
desired position.
DTC No.Detection ItemTrouble Area
46Air mix damper position sensor value does not change even if
A/C amplifier operated air mix damper control servomotor.

Air mix damper servo sub±assy (air mix damper control )

Harness or connector between air mix damper servo sub±
assy (air mix damper control servomotor) and A/C amplifier

A/C amplifier assy
WIRING DIAGRAM
05A8A±02

I35383
RHD Models:
MAX. COOL MAX. HOT
1
2
3
4
5
MAX HOTMAX COOL
I36141
LHD Models:
MAX. COOL MAX. HOT
MAX HOTMAX COOL
±
DIAGNOSTICS AIR CONDITIONING SYSTEM
05±1141
AVENSIS REPAIR MANUAL (RM1018E)
2INSPECT AIRMIX DAMPER SERVO SUB±ASSY
(a)Remove the air mix damper servo sub±assy.
(b)Connect the positive (+) lead from the battery to terminal
MAX HOT and negative (±) lead to terminal MAX COOL,
then check that the lever turns to ºHOTº side smoothly.
(c)Connect the positive (+) lead from the battery to terminal MAX COOL and negative (±) lead to terminal MAX HOT,
then check that the lever turns to ºCOOLº side smoothly.
NGREPLACE AIRMIX DAMPER SERVO SUB±ASSY
OK
3CHECK HARNESS AND CONNECTOR(AIRMIX DAMPER SERVO SUB±ASSY ± A/C AMPLIFIER)
(a)Check for an open or short circuit in harness and connector between air mix c\
ontrol servomotor and
A/C amplifier (See page 01±32).
NG REPAIR OR REPLACE HARNESS ORCONNECTOR
OK
REPLACE AIR CONDITIONING AMPLIFIER

I35378
A25
Air Vent Mode Control Servo Motor A/C Control Assembly
M
FACE 5L±B
A15 AOF4
DEF 4LG±B
A15 AOD3
PT 3GR±R
A16 TPM19
VZ 2BR±W
A16 S5±314
GND 1G±W
A15 SG±315 05±1136
± DIAGNOSTICSAIR CONDITIONING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC 43 AIR OUTLET DAMPER CONTROL
SERVOMOTOR CIRCUIT
CIRCUIT DESCRIPTION
This circuit turns the servomotor and changes each mode damper position by the signals from the A/C ampli-
fier assy. When the AUTO switch is on, the A/C amplifier changes the mode automatically between ºFACEº,
ºBI±LEVELº, ºFOOTº and ºFOOT/DEFº according to the temperature setting.
DTC No.Detection ItemTrouble Area
43Air mode damper position sensor value does not change even
if A/C amplifier operated mode damper control servomotor.

Mode damper servo sub±assy (mode damper control)

Harness or connector between mode damper servo sub±
assy (mode damper control) and A/C amplifier assy

A/C amplifier assy
WIRING DIAGRAM
05A87±02

I35377
A24
Air Mix Control Servo Motor (Front Passenger Side) A/C Control Assembly
MA15 AMPH W
(*1)
W
(*2) W
(*2)5
IQ1 MAX 4 (*1)
HOT 5 (*2)
A15 AMPC Y
(*1)
Y
(*2) Y
(*2)4
IQ1 MAX 5 (*1)
COOL 4 (*2)2
1
A16 TPP V
(*1)
V
(*2) V
(*2)3
IQ1 PT20
3
A16 S5±1 R
(*1)
R
(*2) R
(*2)1
IQ1 VZ 2 (*1)
1 (*2)1
A15 SG±1 P
(*1)
P
(*2) P
(*2)2
IQ1 GND
1 (*1)
2 (*2)13
*1: LHD
*2: RHD
± DIAGNOSTICSAIR CONDITIONING SYSTEM
05±1133
AVENSIS REPAIR MANUAL (RM1018E)
DTC 41 AIR MIX DAMPER CONTROL SERVOMOTOR
CIRCUIT(PASSENGER SIDE)
CIRCUIT DESCRIPTION
This air mix damper servo sub±assy is controlled by the A/C amplifier and moves the air mix damper to the
desired position.
DTC No.Detection ItemTrouble Area
41Air mix damper position sensor value does not change even if
A/C amplifier operated air mix damper control servomotor.

Air mix damper servo sub±assy (air mix damper control)

Harness or connector between air mix damper servo sub±
assy (air mix damper control) and A/C amplifier assy

A/C amplifier assy
WIRING DIAGRAM
05A83±02