engine TOYOTA AVENSIS 2005 Service Repair Manual

A85286
GND KNK1 Signal Waveform 05–132
– DIAGNOSTICSSFI SYSTEM (1ZZ–FE/3ZZ–FE)(From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC P0325 KNOCK SENSOR 1 CIRCUIT (BANK 1 OR
SINGLE SENSOR)
DTC P0327 KNOCK SENSOR 1 CIRCUIT LOW INPUT
(BANK 1 OR SINGLE SENSOR)
DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH INPUT
(BANK 1 OR SINGLE SENSOR)
CIRCUIT DESCRIPTION
The flat type knock sensor (non–resonant type) has a structure that can detect vibration in a wider band of
frequency, from about 6 kHz to 15 kHz and has the following features:
The knock sensor is fitted on the cylinder block to detect engine knocking.
The sensor contains a piezoelectric element which generates voltage when it becomes deformed. This
occurs when the cylinder block vibrates due to knocking. If engine knocking occurs, the ignition timing
is retarded to suppress it.
DTC No.DTC Detecting ConditionTrouble Area
P0325Knock sensor signal level remains at low for more than 10
secondsOpen or short in knock sensor circuit
Knock sensor (under–torqued or looseness)
ECM
P0327Output voltage of the knock sensor is 0.5 V or less
Short in knock sensor circuit
Knock sensor
ECM
P0328Output voltage of the knock sensor is 4.5 V or more
Open in knock sensor circuit
Knock sensor
ECM
HINT:
If the ECM detects DTC P0325, P0327 and/or P0328, it enters fail–safe mode in which the corrective re-
tarded angle value is set to the maximum value.
Reference: Inspection by using the oscilloscope.
The correct waveform is as shown.
ItemContents
TerminalKNK1 – EKNK
Equipment Setting0.01 to 10 V/Division,
0.01 to 10 msec./Division
ConditionAfter warming up the engine,
keep the engine speed at 4,000 rpm
05JOG–03

05KAW–02
G30859
Intelligent
Tester II
DLC3
–
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–239
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
DTC CHECK/CLEAR
1. CHECK DTC WITH INTELLIGENT TESTER II
DTCs which are stored in the ECM can be displayed with the
Intelligent Tester II and generic OBD scantool.
These scan tools can display pending DTCs and current DTCs.
Some DTC aren’t stored if the ECM doesn’t detect a malfunc-
tion during consecutive driving. However, the detected mal-
function during once driving is stored as pending DTC.
(a) Connect the Intelligent Tester II to the Data Link Connec-
tor 3 (DLC3).
(b) Turn the ignition switch ON.
(c) Enter the following menus: Enter/ Power train/ Engine and ECT/ DTC/ Current (or Pending).
(d) Confirm the DTCs and freeze frame data and then write
them down.
(e) See page 05–245 to confirm the details of the DTCs.
NOTICE:
When simulating a symptom with the scan tool to check the
DTCs, use normal mode. For codes on DIAGNOSTIC
TROUBLE CODE CHART subject to ”2–trip detection log-
ic”, perform the following actions.
Turn the ignition switch OFF after the symptom is simulated
once. Then repeat the simulation process again. When the
problem has been simulated twice, the MIL illuminates and the
DTCs are recorded in the ECM.
2. CLEAR DTC WITH INTELLIGENT TESTER II
(a) Connect the Intelligent Tester II to the DLC3.
(b) Turn the ignition switch ON.
(c) Enter the following menus: Enter/ Power train/ Engine and ECT/ DTC/ Clear.
3. CLEAR DTC WITHOUT INTELLIGENT TESTER II
Disconnecting the battery terminal or remove the EFI and
ETCS 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.

05L2J–01
C95801
E13 E12 E10 E9
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–233
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
TERMINALS OF ECM
1. ECM
HINT:
Each ECM terminal’s standard voltage is shown in the table below.
In the table, first follow the information under ”Condition”. Look under ”Symbols (Terminal No.)” for the termi-
nals to inspected. The standard voltage between the terminals is shown under ”Specific Condition”.
Use the illustration above as a reference for the ECM terminals.
Symbols (Terminals No.)Wiring ColorTerminal DescriptionConditionSpecified Condition
SLT+ (E12–13) –
SLT– (E12–12)P–L – PSLT solenoid signalEngine idle speedPulse generation
(See waveform 1)
THO (E12–32) – E2 (E13–28)V – BRATF temperature sensor
signalATF temperature: 115 C (239 F)
or moreBelow 1.5 V
ST (E12–20) – E1 (E13–5)R–B – BRST solenoid signalIG switch ONBelow 1 V
↑↑↑IG switch ON and R gear10 to 14 V
SL (E12–15) – E1 (E13–5)R – BRSL solenoid signalIG switch ONBelow 1 V
↑↑↑Vehicle driving under lock–up range10 to 14 V
S2 (E12–10) – E1 (E13–5)P – BRS2 solenoid signalIG switch ONBelow 1 V
↑↑↑1st or O/D gear10 to 14 V
↑↑↑2nd or 3rd gearBelow 1 V
S1 (E12–11) – E1 (E13–5)P–L – BRS1 solenoid signalIG switch ON10 to 14 V
↑↑↑1st or 2nd gear10 to 14 V
↑↑↑3rd or O/D gearBelow 1 V
SB (E12–8) – E1 (E13–5)L – BRSB solenoid signalIG switch ONBelow 1 V
NT+ (E12–26) – NT– (E12–34)B–O – BSpeed sensor (NT) signalVehicle speed 20 km/h (12 mph)Pulse generation
(See waveform 2)
SPT (E10–8) – E1 (E13–5)L – BRS shift position switch sig-
nalIG switch ON and shift lever S posi-
tion10 to 14 V
↑↑↑IG switch ON and shift lever except
S positionBelow 1 V
D (E10–10) – E1 (E13–5)LG–B – BRD shift position switch sig-
nalIG switch ON and shift lever D and
S position10 to 14 V
↑↑↑IG switch ON and shift lever except
D and S positionBelow 1 V
R (E10–11) – E1 (E13–5)R–Y – BRR shift position switch sig-
nalIG switch ON and shift lever R posi-
tion10 to 14 V
↑↑↑IG switch ON and shift lever except
R positionBelow 1 V

G23426
5 V/DIV
1 ms/DIVGND
GND
C42920C53419
5 V/DIV
0.5 ms/DIV
05–234– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)KD
*1 (E10–31) – E1 (E13–5)W – BRKick–down switch signalIG switch ON and Accelerator pedal
is depressedBelow 1 V
↑↑↑IG switch ON and Accelerator pedal
is released10 to 14 V
SPD (E10–17) – E1 (E13–5)V–W – BRSpeed signalVehicle speed 20 km/h (12 mph)Pulse generation
(See waveform 3)
STP (E10–19) – E1 (E13–5)G–W – BRStop lamp switch signalBrake pedal is depressed7.5 to 14 V
↑↑↑Brake pedal is releasedBelow 1.5 V
SFTU (E10–2) – E1 (E13–5)R – BRUp shift switch signalIG switch ON and shift lever S posi-
tion10 to 14 V
↑↑↑IG switch ON and shift lever ”+”
position (Up shift)Below 1 V
SFTD (E10–1) – E1 (E13–5)B – BRDown shift switch signalIG switch ON and shift lever S posi-
tion10 to 14 V
↑↑↑IG switch ON and shift lever ”–”
position (Down shift)Below 1 V
P (E9–13) – E1 (E13–5)W–L – BRPark position switch sig-
nalIG switch ON and shift lever P posi-
tion10 to 14 V
↑↑↑IG switch ON and shift lever except
P positionBelow 1 V
N (E10–20) – E1 (E13–5)R – BRNeutral position switch
signalIG switch ON and shift lever N posi-
tion10 to 14 V
↑↑↑IG switch ON and shift lever except
N positionBelow 1 V
NSW (E13–23) – E1 (E13–5)B–W – BRPark neutral switch signalIG switch ON and shift lever P and
N positionBelow 1 V
↑↑↑IG switch ON and shift lever except
P and N position10 to 14 V
HINT:
*1: LHD
Waveform 1
Reference:
TerminalSLT+ – SLT–
Tool setting5V/DIV, 1ms/DIV
Vehicle conditionEngine idle speed
Waveform 2
Reference:
TerminalNT+ – NT–
Tool setting5V/DIV, 0.5ms/DIV
Vehicle conditionVehicle speed 20 km/h (12 mph)

05KAT–02
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–227
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
MONITOR DRIVE PATTERN
1. MONITOR DRIVE PATTERN FOR ECT TEST
(a) Perform this drive pattern as one method to simulate the detection conditions of the ECT malfunctions.
(The DTCs may not be detected due the actual driving conditions. And some codes may not be de-
tected through this drive pattern).
HINT:
Preparation for driving

Warm up the engine sufficiently. (Engine coolant temperature is 60
C (140
F) or higher)

Drive the vehicle when the atmospheric temperature is –10
C (14
F) or higher. (Malfunction is not
detected when the atmospheric temperature is –10
C (14
F) or less)
Driving note

Drive the vehicle through all gears.
Stop → 1st → 2nd → 3rd → 4th → 4th (lock–up ON).

Perform engine brake test in the S position.
While driving in the 4(S) position and 4th gear lock–up, shift into the ”–” position and down–shift from
4th to 3rd, 3rd to 2nd, 2nd to 1st.
Check that the engine brake performs properly whenever down–shift takes place.

Repeat the above driving pattern three times or more.
NOTICE:

When using the intelligent tester II, monitor status can be found in the ”Power train / Engine and
ECT / Data List”.

In the event that the drive pattern must be interrupted (possibly due to traffic conditions or other
factors) the drive pattern can be resumed and, in most cases, the monitor can be completed.
CAUTION:
Perform this drive pattern on a level road as much as possible and strictly observe the posted speed
limits and traffic laws while driving.

05KAS–02
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–225
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
INITIALIZATION
1. RESET MEMORY
CAUTION:
Perform the RESET MEMORY (AT initialization) when replacing the automatic transaxle assy, engine
assy or ECM.
NOTICE:
Intelligent tester II only
HINT:
The ECM memorizes the condition that the ECT controls the automatic transaxle assy and engine assy ac-
cording to those characteristics. Therefore, when the automatic transaxle assy, engine assy, or ECM has
been replaced, it is necessary to reset the memory so that the ECM can memorize the new information.
Reset procedure is as follows.
(a) Turn the ignition switch off.
(b) Connect the intelligent tester II to the DLC3.
(c) Turn the ignition switch to the ON position.
(d) Turn the intelligent tester II main switch on.
(e) Perform the reset memory procedure from the main menu.

05KAQ–02
G24063
SST
SST
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–223
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
HYDRAULIC TEST
1. PERFORM HYDRAULIC TEST
(a) Measure the line pressure.
NOTICE:

Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature 50
to 80
C (122 to 176
F).

The line pressure test should always be carried out in pairs. One technician should observe
the conditions of wheels or wheel stopper outside the vehicle while the other is doing the test.

Be careful to prevent SST’s hose from interfering with the exhaust pipe.

This check must be conducted after checking and adjusting engine.

Perform under condition that A/C is OFF.

When conducting stall test, do not continue more than 10 seconds.
(1) Warm up the ATF.
(2) Remove the test plug on the left side of the trans-
axle case and connect SST.
SST 09992–00095 (09992– 00231, 09992–00271)
(3) Fully apply the parking brake and chock the 4
wheels.
(4) Connect an Intelligent Tester II to the DLC3.
(5) Start the engine and check idling speed.
(6) Keep your left foot pressing firmly on the brake ped-
al and shift into D position.
(7) Measure the line pressure when the engine is idling.
(8) Depress the accelerator pedal all the way down.
Quickly read the highest line pressure when engine
speed reaches stall speed.
(9) In the same way, do the test in R position.
Specified line pressure:
ConditionD position kPa (kgf / cm2, psi)R position kPa (kgf / cm2, psi)
Idling372 to 412 kPa
(3.8 to 4.2 kgf/cm2, 54 to 60 psi)
553 to 623 kPa
(5.6 to 6.4 kgf/cm2, 80 to 90 psi)
Stall test1,126 to 1,226 kPa
(11.5 to 12.5 kgf/cm2, 163 to 178 psi)
1,664 to 1,864 kPa
(17.0 to 19.0 kgf/cm2, 241 to 270 psi)
Evaluation:
ProblemPossible cause
If the measured values at all positions are higher
Shift solenoid valve SLT defective

Regulator valve detective
If the measured values at all positions are lower

Shift solenoid valve SLT defective

Regulator valve detective

Oil pump defective
If pressure is low in the D position only
D position circuit fluid leak

Forward clutch defective
If pressure is low in the R position only

R position circuit fluid leak

Reverse clutch defective

1st and reverse brake defective

05KAP–02
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–221
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
MECHANICAL SYSTEM TESTS
1. PERFORM MECHANICAL SYSTEM TESTS
(a) Measure the stall speed.
The object of this test is to check the overall performance of the transaxle and engine by measuring
the stall speeds in the D and R positions.
NOTICE:

Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature 50
to 80
C (122 to 176
F).

Do not continuously run this test for longer than 10 seconds.

To ensure safety, do this test in a wide, clear level area which provides good traction.

The stall test should always be carried out in pairs. One technician should observe the condi-
tions of wheels or wheel stoppers outside the vehicle while the other is doing the test.
(1) Chock the 4 wheels.
(2) Connect an Intelligent Tester II to the DLC3.
(3) Fully apply the parking brake.
(4) Keep your left foot pressed firmly on the brake pedal.
(5) Start the engine.
(6) Shift into the D position. Press all the way down on the accelerator pedal with your right foot.
(7) Quickly read the stall speed at this time.
Stall speed: 2,400
150 rpm
(8) Do the same test in the R position.
Stall speed: 2,400
150 rpm
Evaluation:
ProblemPossible cause
(a) Stall engine speed is low in D and R positions

Engine power output may be insufficient

Stator one–way clutch not operating properly
HINT: If the value is less than the specified value by 600 rpm or
more, the torque converter could be faulty.
(b) Stall engine speed is high in D position

Line pressure is too low

Forward clutch slipping

One–way clutch No.2 not operating properly
(c) Stall engine speed is high in R position

Line pressure is too low

Reverse clutch slipping

1st and reverse brake slipping
(d) Stall engine speed is high in D and R positions
Line pressure is too low

Improper fluid level

05–222– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
(b) Measure the time lag.
(1) When the shift lever is shifted while the engine is idling, there will be a certain time lapse or lag
before the shock can be felt. This is used for checking the condition of the direct clutch, forward
clutch, and 1st and reverse brake.
NOTICE:

Perform the test at the normal operating ATF temperature 50 to 80
C (122 to 176
F).

Be sure to allow 1 minute interval between tests.

Perform the test three times, and measure the time lags. Calculate the average value of the three
time lags.
(2) Connect an Intelligent Tester II to the DLC3.
(3) Fully apply the parking brake.
(4) Start and warm up the engine and check idle speed.
Idle speed: approx. 700 rpm (In N position and A/C OFF)
(5) Shift the lever from N to D position. Using a stop watch, measure the time from when the lever
is shifted until the shock is felt.
Time lag: N → D less than 1.2 seconds
(6) In the same way, measure the time lag for N → R.
Time lag: N → R less than 1.5 seconds
Evaluation (If N → D or N → R time lag is longer than the specified):
ProblemPossible cause
N → D time lag is longer

Line pressure is too low

Forward clutch worn

One–way clutch No.2 not operating properly
N → R time lag is longer

Line pressure is too low

Reverse clutch worn

1st and reverse brake worn

05KAM–02
NE
THW
VTA1, 2
VC
SPD
STP
THONTS1
S2
SLT
SB
SL
W
SIL
TC ECMCrankshaft Position Sensor
Engine Coolant
Temperature Sensor
Throttle Position Sensor
Park/Neutral Position Switch
Speed Sensor
Skid Control ECU
Combination Meter
Input Turbine Speed Sensor
(Speed Sensor NT)
Stop Lamp Switch Assy
ATF (Automatic Transmission
Fluid) Temperature SensorShift Solenoid Valve S1
Shift Solenoid Valve S2
Shift Solenoid Valve SLT
MIL
(Malfunction Indicator Lamp)
DLC3
(Data Link Connector 3) Shift Solenoid Valve SB
Shift Solenoid Valve SL NSW
P, R, N, D
SFTU
SFTD Transmission Control Switch
(Transmission Floor Shift Assy)SPT
Kick Down SwitchKD
*1
*1: LHD
ST
Shift Solenoid Valve ST
– DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U341E) (From February, 2004)05–213
AVENSIS REPAIR MANUAL SUPPLEMENT
(RM1098E)
SYSTEM DIAGRAM
The configuration of the electronic control system in the U341E automatic transaxles is as shown in the fol-
lowing chart.