2005 TOYOTA AVENSIS diagnostic

− DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)05−559
AVENSIS Supplement (RM1045E)
2. DTC CLEAR
(a) When using the hand−held tester:
Clearing the DTCs.
(1) Connect the hand−held tester to the DLC3.
(2) Turn the ignition switch to the ON position. (Do not
start the engine start)
(3) Use the hand−held tester to check the DTCs and
freeze frame data and then write them down. For
the hand−held tester, select the item: DIAGNOSIS
/ OBD/MOBD / DTC INFO / CLEAR CODES.
HINT:
If you need help with the hand−held tester, refer to its instruction
book.
(b) When not using the hand−held tester:
Clearing the DTCs.
(1) Disconnecting the battery terminal or remove the
EFI and THROTTLE fuses from the engine room
R/B for 60 seconds or more. But if you disconnect
the battery terminal, you should do the ”INITIALIZE
” procedure.

05JLB−01
G23403
Hand −Held Tester
DLC3
−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)05 −553
AVENSIS Supplement (RM 1045E)
DIAGNOSIS SYSTEM
1. DESCRIPTION for EURO −OBD (European spec.)
S When troubleshooting Euro −OBD vehicles, the only dif-
ference from the usual troubleshooting procedure is that
you c onnect an O BD scan t ool com plying wit h I SO
1 503 1− 4 or a hand −held tester to the vehicle, and read
the various data output from the vehicle’s ECM.
S Eur o −O BD r egulat ions r equir e t hat t he v ehicle’s on −
board computer illuminates the check engine warning
light (CHK ENG (MIL)) on the instrument panel when the
computer detects a malfunction in: 1) the emission control
system / components, or 2) the powertrain control compo-
nents (which affect vehicle emissions), or 3) the comput-
er. In addition, the applicable Diagnostic Trouble Codes
(DTCs) prescribed by ISO 1503 1− 4 are recorded in the
ECM memory (see page 05 −564).
If the malfunction does not reoccur in 3 consecutive trips, the
CHK ENG (MIL) goes off automatically but the DTCs remain re-
corded in the ECM memory.
S To check the DTCs, connect the OBD scan tool or hand −
held tester to Data Link Connector 3 (DLC3) on the ve-
hicle. The OBD scan tool or hand −held tester also en-
ables you to erase the DTCs and check the freeze frame
data and various forms of engine data. (See the instruc-
tion manual for the OBD scan tool or the hand −held tes-
ter).
S DTCs include ISO controlled codes and manufacturer
controlled codes. ISO controlled codes must be set ac-
cording to the ISO, while manufacturer controlled codes
can be set by a manufacturer within certain restrictions
(see the DTC chart on page 05 −564).
S The diagnosis system operates in normal mode during
normal vehicle use. In ”normal mode”, 2 trip detection log-
ic* is used to ensure accurate detection of malfunctions.
A ”check mode”, is also available to technicians as an op-
tion. In ”check mode”, 1 trip detection logic is used for sim-
ulating malfunction symptoms and increasing the sys-
tem’s ability to detect malfunctions, including intermittent
malfunctions (hand −held tester only)
(see page 05 −557).
S*2 trip detection logic:
When a malfunction is first detected, the malfunction is
temporarily stored in the ECM memory ( 1st trip). If the
ignition switch is turned OFF and then ON again, and the
same malfunction is detected again, the CHK ENG (MIL)
will illuminate (2nd trip).

FI2547
G23403
Hand−Held Tester
DLC3
05 −554−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)
AVENSIS Supplement (RM 1045E)
S Freeze frame data:
The freeze frame data records the engine conditions (fuel
system, calculated load, engine coolant temperature, fuel
trim, engine speed, vehicle speed, etc.) when a malfunc-
tion is detected. When troubleshooting, freeze frame data
can help determine if the vehicle was running or stopped,
if the engine was warmed up or not, if the air −fuel ratio
was lean or rich, and other data from the time the malfunc-
tion occurred.
2. DESCRIPTION for M −OBD (Except European spec.)
S When troubleshoot Multiplex OBD (M −OBD) vehicles, the
only difference from the usual troubleshooting procedure
is that you connect the hand −held tester to the vehicle,
and read the various data output from the vehicle’s ECM.
S The vehicle’s on −board computer illuminates the check
engine warning lamp (CHK ENG (MIL)) on the instrument
panel when the computer detects a malfunction in the
computer itself or in drive system components. In addi-
tion, the applicable Diagnostic Trouble Codes (DTCs) are
recorded in the ECM memory (see page 05 −564).
If the malfunction does not recur, the CHK ENG (MIL) goes off
be disappeared by turning the ignition switch to OFF, but the re-
corded DTCs remain in the ECM memory.
S To check the DTCs, connect the hand −held tester to the
Data Link Connector 3 (DLC3) on the vehicle or connect
terminals TC and CG on the DLC3(DTCs will be displayd
on the multi −information display).
S The diagnosis system operates in normal mode during
normal vehicle use. In ”normal mode”, 2 trip detection log-
ic* is used to ensure accurate detection of malfunctions.
A ”check mode”, is also available to technicians as an op-
tion. In ”check mode”, 1 trip detection logic is used for sim-
ulating malfunction symptoms and increasing the sys-
tem’s ability to detect malfunctions, including intermittent
malfunctions (hand −held tester only)
(see page 05 −558).
S*2 trip detection logic:
When a malfunction is first detected, the malfunction is
temporarily stored in the ECM memory ( 1st trip). If the
ignition switch is turned OFF and then ON again, and the
same malfunction is detected again, the CHK ENG (MIL)
will illuminate (2nd trip).

3 2 145678
910111213141516
DLC33 2 145678
910111213141516
DLC33 2 145678
910111213141516
DLC3
A04550
− DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)05−555
AVENSIS Supplement (RM1045E)
SFreeze frame data:
The freeze frame data records the engine conditions (fuel
system, calculated load, engine coolant temperature, fuel
trim, engine speed, vehicle speed, etc.) when a malfunc-
tion is detected. When troubleshooting, freeze frame data
can help determine if the vehicle was running or stopped,
if the engine was warmed up or not, if the air−fuel ratio
was lean or rich, and other data from the time the malfunc-
tion occurred.
3. CHECK DLC3.
(a) The vehicle’s ECM uses the ISO 9141−2 (Euro−OBD)/
ISO14230(M−OBD) communication protocol. The termi-
nal arrangement of the DLC3 complies with ISO
15031−03 and matches the ISO 9141−2/ ISO14230 for-
mat.
SymbolTerminal No.NameReference TerminalResultCondition
SIL7Bus ”+” line5−Signal groundPulse generationDuring transmission
CG4Chassis groundBody ground1
or lessAlways
SG5Signal groundBody ground1
or lessAlways
BAT16Battery positiveBody ground9to14VAlways
HINT:
If your display shows ”UNABLE TO CONNECT TO VEHICLE”
when you have connected the cable of hand−held tester to the
DLC3, turned the ignition switch to the ON position and oper-
ated the hand−held tester, there is a problem on the vehicle side
or tool side.
SIf communication is normal when the tool is connected to
another vehicle, inspect DLC3 on the original vehicle.
SIf communication is still not possible when the tool is con-
nected to another vehicle, the problem is probably in the
tool itself, so consult the Service Department listed in the
tool’s instruction manual.
4. INSPECT BATTERY VOLTAGE
(a) Measure the battery voltage.
Battery Voltage:11to14V
If the voltage is below11V, recharge the battery before pro-
ceeding.

05−556−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)
AVENSIS Supplement (RM 1045E)
5. CHECK CHK ENG (MIL)
(a) The CHK ENG (MIL) comes on when the ignition switch
is turned to ON position and the engine is not running.
HINT:
If the CHK ENG (MIL) is not illuminated, troubleshoot the CHK
ENG (MIL) circuit (see page 05 −25 1).
( 1 ) When the engine is started, the CHK ENG (MIL)
should go off. If the lamp remains on, it means that
the diagnosis system has detected a malfunction or
abnormality in the system.

056IN−05
−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)05 −545
AVENSIS Supplement (RM 1045E)
PROBLEM SYMPTOMS TABLE
HINT:
If a normal code is displayed during the diagnostic trouble code check although the trouble still occurs, check
the electrical circuits for each symptom in the order given in the charts on the following pages and proceed
to the page given for troubleshooting.
The Matrix Chart is divided into 2 chapters.
1. Chapter 1: Electronic Circuit Matrix Chart
S Refer to the table below when the trouble cause is considered to be electrical.
S If the instruction ”Proceed to next circuit inspection shown on matrix chart” is given in the flow chart
of each circuit, proceed to the circuit with the next highest number in the table to continue the check.
S If the trouble still occurs even though there are no abnormalities in any of the other circuits, check and
replace the ECM.
HINT:
* 1 : When the circuit on which mark * 1 is attached is a malfunction, DTC could be output (see page 05 −564).
*2: LHD
SymptomSuspect AreaSee page
No down −shift
(A particular gear, from 1st to 4th gear, is not down −shifted)
1. Shift solenoid valve (SL 1) circuit*1
2. Shift solenoid valve (SL2) circuit*1
3. Shift solenoid valve (SL3) circuit*1
4. Shift solenoid valve (SR) circuit*1
5. ECM
05 −589
05 −60 1
05 −61 0
05 −598
0 1− 32
No down −shift (5th
4th)
1. Park/neutral position switch circuit *1
2. Shift solenoid valve (S4) circuit*1
3. ECM
05 −566
05 −595
0 1− 32
No up −shift
(A particular gear, from 1st to 4th gear, is not up −shifted)1. Shift solenoid valve (SL 1) circuit*1
2. Shift solenoid valve (SL2) circuit*1
3. ECM
05 −589
05 −60 1
0 1− 32
No up −shift (4th
5th)
1. Park/neutral position switch circuit *1
2. Shift solenoid valve (S4) circuit*1
3. ECM
05 −566
05 −595
0 1− 32
No lock −up
1. Shift solenoid valve (DSL) circuit*1
2. Stop light switch circuit*1
3. Engine coolant temp. sensor circuit*1
4. ECM
05 −582
05 −580
05 −31
0 1− 32
No lock −up off1. Shift solenoid valve (DSL) circuit*1
2. ECM
05 −582
0 1− 32
Shift point too high or too low
1. Throttle position sensor circuit*1
2. Shift solenoid valve (SLT) circuit*1
3. ECM
05 −31
05 −622
0 1− 32
Up −shift to 5th from 4th while engine is cold1. Engine coolant temp. sensor circuit*1
2. ECM
05 −31
0 1− 32
No gear change by shifting into ”+” or ” −” while the shift lever is in
the S position1 . Transmission control switch circuit
2. ECM05 −625
0 1− 32
Harsh engagement (N
D)1. Shift solenoid valve (SL 1) circuit*1
2. ECM
05 −589
0 1− 32
Harsh engagement (Lock −up)1. Shift solenoid valve (SL2) circuit*1
2. ECM
05 −60 1
0 1− 32
Harsh engagement (Any driving position)1. Shift solenoid valve (SLT) circuit*1
2. ECM
05 −622
0 1− 32
Poor acceleration1. Shift solenoid valve (SLT) circuit*1
2. ECM
05 −622
0 1− 32

05−546−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)
AVENSIS Supplement (RM 1045E)
No kick
−down
1. Kick− down switch circuit *2
2. ECM
05−634
0 1− 32
Engine stalls when starting off or stopping1. Shift solenoid valve (DSL) circuit*1
2. ECM
05 −582
0 1− 32
ECT SNOW (ECTS) does not operate
1. Shift solenoid valve (SLT) circuit*1
2. Pattern select (SNOW/ECTS) switch circuit
3. ECM
05 −622
05 −630
0 1− 32
Malfunction in shifting
1. Park/neutral position switch circuit *1
2. Transmission control switch circuit
3. ECM
05 −566
05 −625
0 1− 32

−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)05 −547
AVENSIS Supplement (RM 1045E)
2. Chapter 2: On −Vehicle Repair and Off −Vehicle Repair
( L :U 151E, U 151F AUTOMATIC TRANSAXLE Repair Manual Pub. No. RM 102 1U)
( L 1: Refer to Repair Manual RM 1018E)
SymptomSuspect AreaSee page
Vehicle does not move in forward position and in reverse positions
1. Valve body assy
2. U/D brake (B
3)
3. Torque converter clutch
40 −1 9
L
L 1
Vehicle does not move in R position
1. Valve body assy
2. Reverse clutch (C
2)
3. 1st & reverse brake (B
2)
40 −1 9
L
L
No up −shift ( 1st
2nd)1. Valve body assy
2. 2nd & O/D brake (B
1)
40 −1 9
L
No up −shift (2nd
3rd)1. Valve body assy
2. Direct and O/D clutch (C
0)
40 −1 9
L
No up −shift (3rd
4th)1. Valve body assy
2. 2nd & O/D brake (B
1)
40 −1 9
L
No up −shift (4th
5th)1. Valve body assy
2. U/D clutch (C
3)
40 −1 9
L
No down −shift (5th
4th)Valve body assy40−1 9
No down −shift (4th
3rd)Valve body assy40−1 9
No down −shift (3rd
2nd)Valve body assy40−1 9
No down −shift (2nd
1st)Valve body assy40 −1 9
No lock −up or No lock −up off1. Valve body assy
2. Torque converter clutch40 −1 9
L 1
Harsh engagement (N
D)
1. Valve body assy
2. C
1accumulator
3. Forward clutch (C
1)
4. One −way clutch No. 1(F
1)
5. U/D one −way clutch (F
2)
40 −1 9
L
L
L
L
Harsh engagement (Lock −up)1. Valve body assy
2. Torque converter clutch40 −1 9
L 1
Harsh engagement (N
R)
1. Valve body assy
2. C
2accumulator
3. Reverse clutch (C
2)
4. 1st & reverse brake (B
2)
40 −1 9
L
L
L
Harsh engagement ( 1st
2nd
3rd
4th
5th)Valve body assy40−1 9
Harsh engagement ( 1st
2nd)1. Valve body assy
2. 2nd & O/D brake (B
1)
40 −1 9
L
Harsh engagement (2nd
3rd)
1. Valve body assy
2. C
0accumulator
3. Direct and O/D clutch (C
0)
40 −1 9
L
L
Harsh engagement (3rd
4th)1. Valve body assy
2. 2nd & O/D brake (B
1)
40 −1 9
L
Harsh engagement (4th
5th)
1. Valve body assy
2. C
3accumulator
3. U/D clutch (C
3)
40 −1 9
L
L
Harsh engagement (5th
4th)1. Valve body assy
2. B
3accumulator
40 −1 9
L