2005 TOYOTA AVENSIS Electronic Circuit Inspection

C54864
THOE2
05±900±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FE))
AVENSIS REPAIR MANUAL (RM1018E)
TRANSMISSION FLUID TEMPERATURE SENSOR NO.2 CIRCUIT
CIRCUIT DESCRIPTION
The ATF temperature sensor converts the fluid temperature into a resistance v\
alue which is input into the
ECM.
WIRING DIAGRAM
See page 05±882.
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:
Temperature:
C (
F)Resistance: k

10 (50)6.4
110 (230)0.2
(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
05C8Z±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

C54864
THOE2
±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FSE))05±943
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0711TRANSMISSION FLUID TEMPERATURE
SENSOR ºAº PERFORMANCE
CIRCUIT DESCRIPTION
The ATF temperature sensor converts the fluid temperature into a resistance v\
alue which is input into the
ECM.
DTC No.DTC Detection ConditionTrouble Area
P0711
Both (a) and (b) are detected: (2±trip detection logic)
(a)After 12 sec. of engine start, temp. of atmosphere and that
of engine coolant is more than ±10
C
(b)After normal driving for over 20 min. and 10 km, ATF temp.
is less than 10
C

Open or short in ATF temperature sensor circuit

ATF temperature sensor

ECM
WIRING DIAGRAM
See page 05±941.
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:
Temperature: C ( F)Resistance: k

10 (50)6.4
110 (230)0.2
(c) Measure the resistance between body ground and that
THO as well as E2 of the transmission wire connector.
OK:
Resistance: 1M
or higher
NG REPAIR OR REPLACE TRANSMISSION WIRE
OK
05C98±01

0567W±12
±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FSE))05±935
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
1. Stop light switch circuit
2. Engine coolant temp. sensor circuit
3. Throttle position sensor circuit
4. ECM05±947
05±309
05±309
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±97201±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±309
05±941
05±94301±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±970
01±32

±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±981
AVENSIS REPAIR MANUAL (RM1018E)
10 Basic Inspection ( See page 40±2, 40±8 and 40±69 )
NG Go to step 19
OK
1 1 Mechanical System Test ( See page 05±985 )
NG Go to step 16
OK
1 2 Manual Shifting T est ( See page 05±985 )
NG Go to step 14
OK
1 3 Problem Symptoms T able Chapter 1 ( See page 05±1000 )
NG Go to step 18
OK
1 4 Problem Symptoms T able Chapter 2 ( See page 05±1000 )
NG Go to step 16
OK
1 5 Problem Symptoms T able Chapter 3 ( See page 05±1000 )
NG
16 Part Inspection
Go to step 19
17 DTC Chart ( See page 05±996 )
1 8 Circuit Inspection ( See page 05±1003)

B59192
Wire Harness Side:
D30685
Switch Side:
05±978± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 DRIVING TEST
(a) Start the engine.
(b) Turn the ECT SNOW switch ºOFFº.
(c) Confirm vehicle response by driving from a parked position to fully depressing the accelerator pedal.
(d) Turn the ECT SNOW switch on and perform the same check as (c).
Confirm that there is a difference between ECT SNOW switch ºONº and ºOFFº.
HINT:

Driving test should be done on a paved road (a nonskid road).

Make sure not to use the TRAC system when testing a vehicle equipped with one.
Standard:
There is a difference in acceleration between ºONº and ºOFFº.
NG Go to step 2
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
(See page xx±xxx)
2 CHECK HARNESS AND CONNECTOR(PATTERN SELECT SWITCH ASSY ± BODY
GROUND)
(a) Disconnect the connector of pattern select switch (ECT
SNOW switch).
(b) Measure the resistance between 4 of the wire harness
connector and body ground.
Standard:
Tester connectionSpecified condition
4 ± Body groundBelow 1

NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
3 INSPECT PATTERN SELECT SWITCH ASSY
(a) Measure the resistance between terminals 1 and 4 of pat-
tern select switch (ECT SNOW switch).
Standard:
Switch conditionTester connectionSpecified condition
Press continuously
Pattern select switch1 ± 4Continuity
Release
Pattern select switch1 ± 4No continuity
NG REPLACE PATTERN SELECT SWITCH ASSY
OK

D30751
Instrument Panel J/B Assy
Vehicle Front Side:
DA
DA
SNOW
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))05±979
AVENSIS REPAIR MANUAL (RM1018E)
4 CHECK HARNESS AND CONNECTOR(PATTERN SELECT SWITCH ASSY ±
INTEGRATION RELAY)
(a) Connect the connector of pattern select switch (ECT
SNOW switch).
(b) Disconnect the instrument panel J/B assy (integration
relay) connector.
(c) Measure the resistance between terminal SNOW of
instrument panel J/B assy (integration relay) and body
ground.
Standard:
Switch conditionTester connectionSpecified condition
Press continuously
Pattern select switchDA±14 (SNOW) ± Body
groundBelow 1

Release
Pattern select switchDA±14 (SNOW) ± Body
ground10 k
or higher
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
(See page xx±xxx)

D30684
KD
D02350
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))05±971
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT TERMINAL VOLTAGE
(a) Turn the ignition switch to ON.
(b) Measure the voltage between terminal KD of ECM and
body ground when accelerator pedal is fully depressed or
not.
OK:
Accelerator pedalVoltage
Fully depressed
(Kick±down switch is ON)Below 1 V
Released
(Kick±down switch is OFF)10 to 14 V
OK PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN ON PROBLEM SYMPTOMS TABLE
NG
2 INSPECT KICK DOWN SWITCH
(a) Disconnect the kick±down switch connector.
(b) Check the continuity between terminals 1 and 2 of the
kick±down switch when kick±down switch is ON and OFF.
OK:
Kick±down switchContinuity
ONContinuity
OFFNo continuity
NG REPLACE KICK DOWN SWITCH
OK
3 CHECK HARNESS AND CONNECTOR
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
CHECK AND REPLACE ECM