2005 TOYOTA AVENSIS Electronic Circuit Inspection

05±1018±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U341E)
AVENSIS REPAIR MANUAL (RM1018E)
DTCP1520STOP LIGHT SWITCH CIRCUIT MALFUNCTION
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 Detection ConditionTrouble Area
P1520Stop light switch remains ON while vehicle running (1±trip
detection logic)
Short in stop lamp switch signal circuit

Stop lamp switch

ECM
WIRING DIAGRAM
See page 05±115.
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
CHECK AND REPLACE ECM
05C8K±01

C54864
THOE2
±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U341E)05±1005
AVENSIS REPAIR MANUAL (RM1018E)
DTCP0711TRANSMISSION FLUID TEMPERATURE
SENSOR CIRCUIT RANGE/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 temp. sensor circuit

Transmission wire (ATF temperature sensor)

ECM
WIRING DIAGRAM
See page 05±1003.
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
05C8G±01

0567W±10
05±1000±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U341E)
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
3. Stop light switch circuit
4. Engine coolant temp. sensor circuit
5. Throttle position sensor circuit
6. ECM05±1018
05±16
05±16
01±32
Shift point too high or too low
1. Engine coolant temp. sensor circuit
2. Throttle position sensor circuit
3. ECM05±16
05±16
01±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±103501±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±16
05±1003
05±1005 01±32
Harsh engagement (N
D)ECM01±32
Harsh engagement (Lock±up)ECM01±32
Harsh engagement (Any driving range)ECM01±32
Poor acceleration
1. Pattern select switch circuit (ECT SNOW switch)
2. Instrument panel J/B assy (Integration relay)
3. ECM05±1040
01±32
Engine stalls when starting off or stoppingECM01±32
No kick±down1. Kick±down switch circuit
2. ECM05±103301±32
No 2nd start
1. Pattern select switch circuit (ECT SNOW switch)
2. Transmission control switch circuit
3. Park/neutral position switch circuit
4. Instrument panel J/B assy (Integration relay)
5. ECM05±1040
05±1035
05±1024
05±104001±32

±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
05±1063
AVENSIS REPAIR MANUAL (RM1018E)
DTCC1516/16Calibration of Sensor Zero Point Not
Completed
CIRCUIT DESCRIPTION
This DTC does not indicate trouble. This is detected when the torque sensor \
zero point calibration is not
completed normally.
DTC No.DTC Detecting ConditionTrouble Area
C1516/16The torque sensor zero point calibration is not completed
normally.Sensor zero point calibration failure.
INSPECTION PROCEDURE
1CLEAR DTC(See page 05±1045)
2PERFORM CALIBRATION OF TORQUE SENSOR ZERO POINT(See page 05±1045)
3 RECONFIRM DTC
(a)Check the DTCs (See page 05±1045).
(A): DTC C1516/16 output after attempted 3 time or more.
(B): Normal code output.
HINT:
If the DTC code is output in spite of conducting the steering zero point c\
alibration, replace the steering col-
umn assy.
(A) REPLACE STEERING COLUMN ASSY
(B)
END
0579K±02

05±1062
±
DIAGNOSTICS ELECTRONIC MOTOR POWER STEERING SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
DTCC1515/15Torque Sensor Zero Point Calbration Not Performed
CIRCUIT DESCRIPTION
This DTC does not indicate trouble. Perform calibration of torque sensor zer\
o point to delete DTC.
DTC No.DTC Detecting ConditionTrouble Area
C1515/15When torque sensor zero point calibration is not performed,
this DTC is detected.Sensor zero point calibration is not performed.
INSPECTION PROCEDURE
1RECONFIRM DTC
(a)Check the DTCs (See page 05±1045).
(b) Is DTC excepted for C1515/15 outputed?
YES REPAIR CIRCUIT INDICATED BY OUTPUTCODE
NO
2PERFORM CALIBRATION OF TORQUE SENSOR ZERO POINT(See page 05±1045)
3 RECONFIRM DTC
(a)Check the DTC (See page 05±1045).
(b) Is DTC C1516/16 outputed? NO END
YES
REPAIR CIRCUIT INDICATED BY DTC C1516/16(See page 05±1063)
050YA±04

050WO±04
F44303
E14
Connector AE15
Connector B
± DIAGNOSTICSELECTRONIC MOTOR POWER STEERING SYSTEM
05±1057
AVENSIS REPAIR MANUAL (RM1018E)
TERMINALS OF ECU
POWER STEERING ECU ASSY
NOTICE:
When performing the inspection of power steering ECU, ECU must be installed to the vehicle or fully
fixed.
Symbols (Terminal No.)Wiring ColorConditionSpecified condition
PIG (E14±1) ± PGND (E14±2)L ± W±BIG switch ON10 to 16 V
PGND (E14±2) ± Body GroundW±B ± Body
GroundAlwaysBelow 1.0 V
M1 (A 1) PGND (E14 2)WBIG switch ON, turn the steering wheel to leftBelow 1.0 VM1 (A±1) ± PGND (E14±2)± ± W±BIG switch ON, turn the steering wheel to right10 to 16 V
M2 (A 2) PGND (E14 2)WBIG switch ON, turn the steering wheel to left10 to 16 VM2 (A±2) ± PGND (E14±2)± ± W±BIG switch ON, turn the steering wheel to rightBelow 1.0 V
SIL (E15±2) ± PGND (E14±2)W±G ± W±BIG switch ON10 to 16 V
RLY (E15±3) PGND (E14±2)W±R ± W±BIG switch ON, after 1 sec. or moreBelow 2.0 V
Tc (E15 4) PGND (E14 2)WL WBIG switch ON5 to 16 VTc (E15±4) ± PGND (E14±2)W±L ± W±BIG switch ON, short circuit Tc and CG terminals of DLC3Below 1.0 V
SPD (E15±5) ± PGND (E14±2)V±W ± W±BIG switch ONPulse generation
IG (E15±6) ± PGND (E14±2)R±W ± W±BIG switch ON10 to 16 V
IDUP (E15±8) ± PGND (E14±2)GR ± W±BIG switch ON5 to 16 V
WL (E15 9) PGND (E14 2)BW WBIG switch ON, P/S warning light goes off10 to 16 VWL (E15±9) ± PGND (E14±2)B±W ± W±BIG switch ON, P/S warning light comes onBelow 1.0 V
Ts (E15 11) PGND (E14 2)WWBIG switch ON5 to 16 VTs (E15±11) ± PGND (E14±2)W ± W±BIG switch ON, short circuit Ts and CG terminals of DLC3Below 1.0 V
TACH (E15±12) ± PGND
(E14±2)GR±R ± W±BIG switch ONPulse generation
TRQ1 (B±5) ± PGND (E14±2)± ± W±BIG switch ON, turn the steering wheel to left and right0.3 to 4.7 V
TRQV (B±6) ± PGND (E14±2)± ± W±BIG switch ON7.5 to 8.5 V
TRQ2 (B±7) ± PGND (E14±2)± ± W±BIG switch ON, turn the steering wheel to left and right0.3 to 4.7 V
TRQG (B±8) ± PGND (E14±2)± ± W±BIG switch ONBelow 1.0 V

D30685
± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)05±1041
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT PATTERN SELECT SWITCH ASSY
(a) Disconnect the connector of pattern select switch.
(b) Check the continuity between terminals 1 and 4 of the pat-
tern select switch.
OK:
Pattern select switchSpecified condition
Press continuously Pattern select switchContinuity
Release Pattern select switchNo continuity
NG REPLACE PATTERN SELECT SWITCH ASSY
OK
2 CHECK HARNESS AND CONNECTOR(PATTERN SELECT SWITCH ± INTEGRA-
TION RELAY, PATTERN SELECT SWITCH ± BODY GROUND)
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

H42584
KD
D02350
05±1034± DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E)
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT TERMINAL VOLTAGE
(a) Turn the ignition switch ON.
(b) Measure 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 continuity between terminals of the kick±down
switch connector 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