2005 TOYOTA AVENSIS Circuit

05±932±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))
AVENSIS REPAIR MANUAL (RM1018E) P0778
(05±956)
Pressure Control Solenoid ºBº
Electrical
(Shift Solenoid Valve SL2) Open or short in shift solenoid valve SL2 circuit
 Shift solenoid valve SL2
 ECM


P0793
(05±965)Intermediate Shaft Speed Sen-
sor ºAº Open or short in speed sensor (NC) circuit
 Speed sensor (NC)
 ECM


P0982
(05±956)Shift Solenoid ºBº Control Circuit
Low (Shift Solenoid Valve S4) Open or short in shift solenoid valve S4 circuit
Shift l id l S4


P0983
(05±956)Shift Solenoid ºBº Control Circuit
High (Shift Solenoid Valve S4) Shift solenoid valve S4
 ECM


P2716
(05±967)Pressure Contorl Solenoid ºDº
Electrical
(Shift Solenoid Valve SLT) Open or short in shift solenoid valve SLT circuit
 Shift solenoid valve SLT
 ECM



0567Q±07
05±996±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U341E)
AVENSIS REPAIR MANUAL (RM1018E)
DIAGNOSTIC TROUBLE CODE CHART
If a DTC is displayed during the DTC check, check the circuit listed in th\
e table below and proceed to the
page given.
*
1 :
... MIL light up
DTC No.
(See Page)Detection ItemTrouble AreaMIL *1Memory
P0500
(05±98)Vehicle Speed Sensor Malfunc-
tion
 Combination meter
 Open or short in speed sensor circuit
 Speed sensor
 ECM


P0710
(05±1003)Transmission Fluid Temperature
Sensor Circuit Malfunction
(ATF Temperature Sensor)
 Open or short in ATF temp. sensor circuit


P0711
(05±1005)
Transmission Fluid Temperature
Sensor Circuit Range/Perfor-
mance
(ATF Temperature Sensor)
Oen or short in AT F tem. sensor circuit
 Transmission wire (ATF temperature sensor)
 ECM


P0750
(05±1007)Shift Solenoid ºAº Malfunction
(Shift Solenoid Valve S1) Shift solenoid valve S1 is stuck open or closed
 Valve body is blocked up or stuck
 Automatic transaxle (clutch, brake or gear etc.)


P0753
(05±1010)Shift Solenoid ºAº Electrical
(Shift Solenoid Valve S1) Open or short in shift solenoid valve S1 circuit
 Shift solenoid valve S1
 ECM


P0755
(05±1007)Shift Solenoid ºBº Malfunction
(Shift Solenoid Valve S2) Shift solenoid valve S2 is stuck open or closed
 Valve body is blocked up or stuck
 Automatic transaxle (clutch, brake or gear etc.)


P0758
(05±1010)Shift Solenoid ºBº Electrical
(Shift Solenoid Valve S2) Open or short in shift solenoid valve S2 circuit
 Shift solenoid valve S2
 ECM


P0770
(05±1013)Shift Solenoid ºEº Malfunction
(Shift Solenoid Valve SL)
 Shift solenoid valve SL is stuck open or closed
 Valve body blocked or stuck
 Shift solenoid valve SL
 Torque converter clutch
 Automatic transaxle (clutch, brake or gear etc.)


P0773
(05±1015)Shift Solenoid ºEº Electrical
(Shift Solenoid Valve SL) Open or short in shift solenoid valve SL circuit
 Shift solenoid valve SL
 ECM


P1520
(05±1018)Stop Light Switch Circuit
 Open or short in stop light switch circuit
 Stop lamp switch assy
 ECM


P1725
(05±1019)NT Revolution Sensor Circuit
Malfunction
(Input Turbine Speed Sensor) Open or short in speed sensor (NT) circuit
 Speed sensor (NT)
 ECM


P1760
(05±1021)Linear Solenoid for Line Pres-
sure Control Circuit Malfunction
(Shift Solenoid Valve SLT) Open or short in shift solenoid valve SLT circuit
 Shift solenoid valve SLT
 ECM


P1780
(05±1024)Park/Neutral Position Switch
Malfunction Short in park/neutral position switch circuit
 Park/Neutral position switch assy
 ECM


P1790
(05±1027)ST Solenoid Circuit Malfunction
(Shift Solenoid Valve ST) Open or short in shift solenoid valve ST circuit
 Shift solenoid valve ST
 ECM


P1798
(05±1030)SB Solenoid Circuit Malfunction
(Shift Solenoid Valve SB) Open or short in shift solenoid valve SB circuit
 Shift solenoid valve SB
 ECM



±
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)

D30688
ECM
MPX2
MPX1 29
18 E10 11
B8
22 SNOWI14
Integration Relay
8
Driver Side J/B14
DA B E8
ECT Pattern Select SW
*1: RHD
*2: LHD 4 1 W±B
CH
CF
CA 8
11
6
W±B
IPE10 MPX1
MPX2
*1
*2
B8
(*3) Pattern Select Switch (ECT SNOW Switch)
When the ECT SNOW switch is pushed, the switch contact is made and the ECT SNOW mode is selected.
To cancel the ECT SNOW mode, push the ECT SNOW switch once again. The ECT SNOW mode is automatical-
ly cancelledout when the ignition switch is turned ºOFFº.
*3
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))05±977
AVENSIS REPAIR MANUAL (RM1018E)
PATTERN SELECT SWITCH CIRCUIT
CIRCUIT DESCRIPTION
ECT SNOW is the system that operates the throttle motor to control engine output to reduce skidding of the
driving wheels, guarantee takeoff acceleration, driving straightness and turning stability.
WIRING DIAGRAM
05C9L±01

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)

05±972± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))
AVENSIS REPAIR MANUAL (RM1018E)
TRANSMISSION CONTROL SWITCH CIRCUIT
CIRCUIT DESCRIPTION
When shifting the shift lever into S position using the transmission control switch, it is possible to shift in 1
to 4 positions.
Shifting º+º once changes up 1 shift range position, º±º once changes down 1 shift range position respective-
ly.
05C9K±01

G25416
ECM
KD
E10 K2
Kick Down SW
IP66
CA
1
2 CJ
IG24
W±BCenter J/B
30
8
IG2
W±B
W W W±B
05±970± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E(1AZ±FSE))
AVENSIS REPAIR MANUAL (RM1018E)
KICK DOWN SWITCH CIRCUIT
CIRCUIT DESCRIPTION
The kick±down switch is turned ON when the accelerator pedal is depressed to the full throttle and sends
signals to ECM.
When the kick±down switch is turned ON, the ECM controls gear shifting according to the programmed shift
diagrams.
If a short circuit develops in the kick±down switch, the ECM disregards the kick±down signals and controls
shifting at the normal shift points.
WIRING DIAGRAM
05C9J±01