TOYOTA AVENSIS 2005 Service Repair Manual

05±808
± DIAGNOSTICSABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTC C1241/41 LOW BATTERY POSITIVE VOLTAGE OR
ABNORMALLY HIGH BATTERY POSITIVE
VOLTAGE
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1241/41
Low battery voltage is less than 9.8 V at the time of non±
operation of ABS control or less than 9.4 V at the time of
operation of ABS control, or battery voltage is more than
17.4 V.
Battery

IC regulator

Power source circuit
05436±04

F45133
1 2 33ALT Engine Room R/B No.3
B (*2) W (*2) B±G (*1)
ALT 1
4D 1
1
4B Engine Room J/B No.4 ED1
BatteryFL MAIN
*1: 1AZ±FSE
*2: 1CD±FTV
*3: LHD
*4: RHD B±G (*1)
B±L (*2)
1
5918
1 53
2
1
DH DA DB DN
DH
AM1 ECU±IG IG Relay
W±BS110
GND1 GND2
S16
W±BW±B
EA W±B
IJ B (*2) B±G (*1)G±Y R±W
W±B
G±R G±Y G±YR±W R±W
R±W J/C
J10 J20 J10 J20 S1 IG1GC GC 1422
IE1Skid Control ECU
with Actuator
(*3) (*4) (*3) (*4)
I13
Ignition SW
1 3
B±L (*2)
Driver Side J/B
AM1 IG1
± DIAGNOSTICSABS WITH EBD & BA & TRC & VSC SYSTEM
05±809
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM

F45090
Driver Side J/BECU±IG
C94397
GND
IG1
05±810
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1INSPECT FUSE(ECU±IG FUSE)
(a)Remove the ECU±IG fuse from the driver side J/B.
(b)Check continuity of the ECU±IG fuse. OK:
Continuity
NGINSPECT FOR SHORT CIRCUIT IN ALL HARNESS AND COMPONENTS CONNECTED
TO ECU±IG FUSE
OK
2INSPECT BATTERY
OK:
Voltage: 10 to 14 V NGINSPECT CHARGING SYSTEM
OK
3INSPECT SKID CONTROL ECU TERMINAL VOLTAGE(IG1 TERMINAL)
IN CASE OF USING HAND±HELD TESTER:
(a)Check the voltage condition, which is output from the ECU and displayed \
on the hand±held tester. OK:
ºNormalº is displayed. IN CASE OF NOT USING HAND±HELD TESTER:
(a)Disconnect the skid control connector.
(b)Turn the ignition switch ON.
(c)Measure the voltage between terminals IG1 and GND ofthe skid control ECU harness side connector.
OK:
Voltage: 10 to 14 V
OKREPLACE ABS & TRACTION ACTUATOR ASSY (See page 32±57)
NG

C94397
GND
±
DIAGNOSTICS ABS WITH EBD & BA & TRC & VSC SYSTEM
05±811
AVENSIS REPAIR MANUAL (RM1018E)
4INSPECT SKID CONTROL ECU CONNECTOR(GND TERMINAL CONTINUITY)
(a)Disconnect the skid control ECU connector.
(b)Measure resistance between terminal GND of the skid
control ECU harness side connector and body ground.
OK:
Resistance: 1
or less
NGREPAIR OR REPLACE HARNESS OR CONNECTOR(GND TERMINAL ± BODY
GROUND)(See page 01±32)
OK
CHECK AND REPAIR HARNESS AND CONNECTOR(BATTERY ± IG1 TERMINAL)
(See page 01±32)

D26540
T4
Turbine Speed SensorECM
NT+ E1227
B±O
2
B
NT± E1235 1 05±884
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0717/37 TURBINE SPEED SENSOR CIRCUIT NO
SIGNAL
CIRCUIT DESCRIPTION
This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT)
with the counter gear speed sensor signal (NC), the ECM detects the shift timing of the gears and appropri-
ately controls the engine torque and hydraulic pressure according to various conditions. Thus smooth gear
shifting is performed.
DTC No.DTC Detection ConditionTrouble Area
P0717/37
ECM detects conditions (a), (b), (c) and (d) continuity for 5 sec.
or more: (2 trip detection logic)
(a) Vehicle speed: 50 km/h (20 mph) or more
(b) 2nd, 3rd or O/D gear
(c) Solenoid valves and park/neutral position switch are normal
(d) NT < 300 rpm

Open or short in speed sensor (NT) circuit

Speed sensor (NT)

ECM
WIRING DIAGRAM
05C8U±01

C58536
C95812
NT+
NT±
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±885
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT SPEED SENSOR(NT)
(a) Disconnect the speed sensor connector from the trans-
axle.
(b) Measure the resistance between terminals of speed sen-
sor.
OK:
Resistance:
TOYOTA made: 500 to 620
at 20
C (68
F)
AISIN made: 560 to 680
at 20
C (68
F)
NG REPLACE SPEED SENSOR(NT)
OK
2 CHECK HARNESS AND CONNECTOR(SPEED SENSOR ± ECM)
(a) Connect the speed sensor connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance between terminals NT+ and NT±.
OK:
Resistance:
TOYOTA made: 500 to 620
at 20
C (68
F)
AISIN made: 560 to 680
at 20
C (68
F)
(d) Measure the resistance between body ground and that
NT+ as well as NT± of the ECM connector.
OK:
Resistance: 1M
or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ECM

D26545
E1
ECT Solenoid
ECM
28
E2 BR
6
30
THO
E13
1 E2
THO O
O
VE13 05±882
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0710/38 TRANSMISSION FLUID TEMPERATURE
SENSOR ºAº CIRCUIT
DTC P0712/38 TRANSMISSION FLUID TEMPERATURE
SENSOR ºAº CIRCUIT LOW INPUT
DTC P0713/38 TRANSMISSION FLUID TEMPERATURE
SENSOR ºAº CIRCUIT HIGH INPUT
CIRCUIT DESCRIPTION
The ATF temperature sensor converts the fluid temperature into a resistance value which is input into the
ECM.
DTC No.DTC Detection ConditionTrouble Area
P0710/38
(a) and (b) is detected momentary within 0.5 sec. when neither
P0712 or P0713 is not detected (1±trip detection logic)
(a) ATF temperature sensor resistance is less than 79 
(b) ATF temperature sensor resistance is more than 156 k
HINT:
Wthin 0.5 sec. the malfunction switches from (a) to (b) or from
(b) to (a)

Open or short in ATF temperature sensor circuit

ATF temperature sensor
P0712/38ATF temperature sensor resistance is less than 79 for 0.5
sec. or more (1±trip detection logic)
ECM
P0713/38
DTC is detected for 0.5 sec. or more (1±trip detection logic)
ATF temperature sensor resistance is more than 156 kafter
started engine for 15 minutes or more
WIRING DIAGRAM
05C8T±01

C54864
THO
E2
C95813THOE2
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FE))05±883
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE(ATF TEMPERATURE SENSOR)
(a) Disconnect the transmission wire connector from the
transaxle.
(b) Measure the resistance between terminals THO and E2.
OK:
Resistance: 79
to 156 k

(c) Check the continuity between the wire harness side con-
nectors.
OK:
Standard (Check for a short):
SymbolsSpecified condition
THO ± Body groundNo continuityE2 ± Body groundNo continuity
NG REPAIR OR REPLACE TRANSMISSION WIRE
OK
2 CHECK HARNESS AND CONNECTOR(TRANSMISSION WIRE ± ECM)
(a) Connect the transmission wire connector to the transaxle.
(b) Disconnect the ECM connector.
(c) Measure the resistance between terminals THO and E2.
OK:
Resistance: 79
to 156 k

(d) Check the continuity between the wire harness side con-
nectors.
OK:
Standard (Check for a short):
SymbolsSpecified condition
THO ± Body groundNo continuityE2 ± Body groundNo continuity
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE ECM

0567W±11
±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FE))05±879
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
HINT:
If a normal code is displayed during the DTC check but the trouble still o\
ccurs, check the circuits for each
symptom in the order given in the charts on the following pages and proceed to \
the page given for trouble-
shooting.
The Matrix Chart is divided into 3 chapters.

If the instruction ºProceed to next circuit inspection shown on matri\
x chartº is given in the flow chart
for each circuit, proceed to the circuit with the next highest number in the table to continue the check.

If the trouble still occurs even though there are no abnormalities in any of the other circuits, then ch\
eck
and replace the ECM.
CHAPTER 1: ELECTRONIC CIRCUIT MATRIX CHART
SymptomSuspect AreaSee page
No up±shift (A particular gear, from 1st to O/D gear, is not up±
shifted)ECM01±32
No down±shift (A particular gear, from O/D to 1st gear, is not
down±shifted)ECM01±32
No lock±up or No lock±up off
4. Stop light switch circuit
5. Engine coolant temp. sensor circuit
6. Throttle position sensor circuit
7. ECM05±905
05±161
05±161
01±32
Shift point too high or too lowECM01±32
No gear change by shifting into º+º or º±º while the shif\
t lever is in
the Sposition1. Transmission control switch circuit
2. ECM05±91001±32
Up±shift to O/D from 3rd while engine is cold
1. Engine coolant temp. sensor circuit
2. ATF temp. sensor circuit
3. ECM05±161
05±88201±32
Harsh engagement (N
D)ECM01±32
Harsh engagement (Lock±up)ECM01±32
Harsh engagement (Any driving range)ECM01±32
Poor accelerationECM01±32
Engine stalls when starting off or stoppingECM01±32
No kick±down1. Kick±down switch circuit
2. ECM05±908
01±32

05±880±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
Chapter 2: On±vehicle Repair
(
: U241E AUTOMATIC TRANSAXLE Repair Manual Pub. No. RM840U)
SymptomSuspect AreaSee page
Vehicle does not move in any forward range or reverse range
1. Manual valve
2. Primary regulator valve
3. Off±vehicle repair matrix chart



±
Vehicle does not move in R rangeOff±vehicle repair matrix chart±
No up±shift (1st
2nd)1. Valve body assy
2. Off±vehicle repair matrix chart

±
No up±shift (2nd
3rd)1. Valve body assy
2. Off±vehicle repair matrix chart

±
No up±shift (3rd
O/D)1. Valve body assy
2. Off±vehicle repair matrix chart

±
No down±shift (O/D
3rd)Valve body assy

No down±shift (3rd
2nd)Valve body assy

No down±shift (2nd
1st)Valve body assy

No lock±up or No lock±up off1. Valve body assy
2. Off±vehicle repair matrix chart

±
Harsh engagement (N
D)
1. C1 accumulator
2. Off±vehicle repair matrix chart
3. Valve body assy
±


Harsh engagement (N
R)1. Valve body assy
2. Off±vehicle repair matrix chart

±
Harsh engagement (Lock±up)1. Valve body assy
2. Off±vehicle repair matrix chart
±
Harsh engagement (2nd
3rd)Valve body assy

Harsh engagement (3rd
O/D)Valve body assy

Harsh engagement (O/D
3rd)Valve body assy

Slip or shudder (Forward and reverse)1. Oil strainer
2. Off±vehicle repair matrix chart40±47
±
No kick±downValve body assy