Page 4326 of 5135

05I7H−01
−
DIAGNOSTICS ECD SYSTEM (1CD −FTV)(From September, 2003)
05 −27 1
AVENSIS Supplement (RM 1045E)
BASIC INSPECTION
When the malfunction is not confirmed in the DTC check, troubleshooting should be carried out in all the
possible circuits considered as causes of the problem. In many cases, by carrying out the basic engine check
shown in the following flowchart, the location causing the problem can be found quickly and efficiently. There-
fore, using this check is essential in the engine troubleshooting.
1 CHECK BATTERY VOLTAGE
NOTICE:
Carry out this check with the engine stopped and ignition switch OFF.
OKNG
Voltage11 V or moreLess than 11 V
NG CHARGE OR REPLACE BATTERY
OK
2 CHECK IF ENGINE WILL CRANK
NG PROCEED TO PROBLEM SYMPTOMS TABLE ON PAGE 05 −282
OK
3 CHECK AIR FILTER
(a) Visually check if the air filter is not contaminated with dirt or oil. NG CLEAN OR REPLACE
OK
4 CHECK FUEL QUALITY
(a) Check that only diesel fuel is used.
(b) Check that the fuel does not contain any impurity. NG REPLACE FUEL
OK
5 CHECK ENGINE OIL (See page 17− 9)
NG ADD OR REPLACE
OK
Page 4363 of 5135
A78431
Crankshaft Position Sensor Component Side:
C4
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−521
AVENSIS Supplement (RM1045E)
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR
19 INSPECT CRANKSHAFT POSITION SENSOR
(a) Disconnect the C4 crankshaft position sensor connector.
(b) Measure the resistance between terminals1and 2.
Standard:
Tester ConnectionSpecified Condition
121,630 to 2,740at cold1−22,065 to 3,225at hot
NOTICE:
”Cold” and ”Hot” shown above mean the temperature of
the coils themselves. ”Cold” is from−10_C(14_F) to 50_C
(122_F) and ”Hot” is from 50_C(122_F) to100_C(212_F).
(c) Reconnect the crankshaft position sensor connector.
NG REPLACE CRANKSHAFT POSITION SENSOR
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR
Page 4369 of 5135
A81016
ECM
STA
E97
B−Y
IJW−BJ12
B B
J13
J/C W−B 1 5
32 1AM2 2
B
B−R1
S51
S4
Starter
Battery7IK1
FL MAIN 3 3
Engine Room
R/B No. 3
B B 55
55 1
11A
BB−R
IE41
(LHD)IP11
(RHD)B−R
Engine
Room
R/B No. 1
Driver
Side R/B ST
Relay
2
DJ
9
DADriver
Side J/B B−R
B−RI13
Ignition Switch
4
5
AM2 ST2B−Y
B−Y
6
2ST 1
6 Fuse
Block
B−WB−YB−Y B−Y
J12
A C
J13C
J13 05−494
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
STARTER SIGNAL CIRCUIT
CIRCUIT DESCRIPTION
HINT:
While the engine is being cranked, current flows from terminal ST2 of the ignition switch to the ST relay coil
and also current flows to terminal STA of the ECM (STA signal).
WIRING DIAGRAM
05I7V−01
Page 4372 of 5135
A81013
ECM
+BMREL IGSW J27
9
B−W I13
Ignition Switch
6IGNB−W E
E1
EE110BR
W−B 1Driver Side J/B
2 2
1E9
E9
E98
1
7
E12 J26A
B−W
C C B−W
J8
J/C DA 18
DH2
4
EFI5
1
32 EFI
MAIN
Relay
B−W Engine Room R/B No. 1IK1
6J/C
IE12
BR B−R
Battery AM2B−W
EC
EI
AM2 IG2
GR
B B
33
Engine Room R/B No. 3
FL MAIN1 1
1 1A1 1
1 1 B−R B−R
IE4 1(LHD)
IP1 1(RHD)B−W (RHD) (RHD)
(LHD)
(LHD)
GR B−Y (RHD) B−R (LHD)
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
05−489
AVENSIS Supplement (RM1045E)
ECM POWER SOURCE CIRCUIT
CIRCUIT DESCRIPTION
When the ignition switch is turned to ON, the positive battery voltage is applied to terminal IGSW of the ECM
and the EFI MAIN relay control circuit in the ECM sends a signal to terminal MREL of the ECM switching
on the EFI MAIN relay.
This signal causes current to flow to the coil, closing the contacts of the EFI MAIN relay and supplying power
to terminal +B of the ECM.
WIRING DIAGRAM
05B5V−05
Page 4461 of 5135

A85520
123
2 3
4
4
1
A80987
R/B No. 3:
GLOW
Fuse
B08263
Ohmmeter
Continuity 05−390
− DIAGNOSTICSECD SYSTEM (1CD−FTV)(From September, 2003)
AVENSIS Supplement (RM1045E)
2 INSPECT GLOW PLUG RELAY ASSY
(a) Remove the glow plug relay.
(b) Check for continuity in the glow plug relay.
(1) Check that there is continuity between the termi-
nals.
Standard:
Tester ConnectionSpecified Condition
No continuity
3−4Continuity
(Apply battery voltage to terminals 1 and 2)
1−2Continuity
(c) Reinstall the glow plug relay.
NG REPLACE GLOW PLUG RELAY ASSY
OK
3 INSPECT FUSE(GLOW FUSE)
(a) Remove the GLOW fuse from the R/B No. 3.
(b) Check for continuity in the GLOW fuse.
Standard: Continuity
(c) Reinstall the GLOW fuse.
NG CHECK FOR SHORT IN ALL HARNESS AND
COMPONENTS CONNECTED TO FUSE
OK
4 INSPECT GLOW PLUG ASSY
(a) Disconnect the glow plug wire.
(b) Measure the resistance in the glow plug.
Standard:
Tester ConnectionSpecified Condition
Glow plug terminal−Body groundApproximately 1.1at 20_C (68_F)
NOTICE:
SExercise extreme care not to damage the glow plug
pipes. Damaging them could cause an open circuit, or
shorten the life of the glow plugs.
SKeep the glow plug free of oil and fuel while cleaning.
SWipe any oil off the terminal and Bakelite washer with
a clean−dry cloth during inspection.
SDo not apply more than11V to the glow plug as it
could cause an open circuit.
(c) Reconnect the glow plug wire.
Page 4474 of 5135

100LV−01
A84674
Ohmmeter
A84675
Spool Valve
Battery
A84676Battery Voltmeter
Air 10−2
− ENGINE CONTROL SYSTEMSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
INSPECTION
1. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE
ASSY
(a) Inspect the resistance.
(1) Using an ohmmeter, measure the resistance be-
tween the terminals.
Standard:
Tester ConnectionSpecified Condition
1(−)−2 (+)6.9 to 7.9at 20_C (68_F)
If the resistance is not as specified, replace the camshaft timing
oil control valve.
(b) Check the operation.
(1) Connect the positive (+) lead from the battery to ter-
minal 2 and negative (−) lead to terminal 1, then
check the movement of the spool valve.
NOTICE:
Confirm that the spool valve moves freely and does not
stick in any position.
HINT:
Bad returning of the spool valve resulted from catching foreign
objects cause subtle leak to the advanced direction. In that
case, DTC can be detected.
2. INSPECT MASS AIR FLOW METER
(a) Check the operation.
(1) Apply battery voltage across terminals 1 (+B) and 2
(E2G).
(2) Using a voltmeter, connect the positive (+) tester
probe to terminal 3(VG), and negative (−) tester
probe to terminal 2 (E2G).
(3) Blow air into the mass air flow meter, then check that
the voltage fluctuates.
If the operation is not as specified, replace the mass air flow me-
ter.
Page 4546 of 5135
![TOYOTA AVENSIS 2005 Service Repair Manual 05−548−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)
AVENSIS Supplement (RM 1045E)
Slip or shudder (Forward and reverse: After warm
−up)
1. Valve body assy
2. Oil straine TOYOTA AVENSIS 2005 Service Repair Manual 05−548−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)
AVENSIS Supplement (RM 1045E)
Slip or shudder (Forward and reverse: After warm
−up)
1. Valve body assy
2. Oil straine](/manual-img/14/57441/w960_57441-4545.png)
05−548−
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U 151E)
AVENSIS Supplement (RM 1045E)
Slip or shudder (Forward and reverse: After warm
−up)
1. Valve body assy
2. Oil strainer
3. Direct and O/D clutch (C
0)
4. Forward clutch (C
1)
5. U/D clutch (C
3)
6. 2nd & O/D brake (B
1)
7. U/D brake (B
3)
8. One −way clutch No. 1(F
1)
9. U/D one −way clutch (F
2)
1 0.Torque converter clutch
40 −1 9
40 −1 9
L
L
L
L
L
L
L
L 1
Slip or shudder (Particular position: Just after engine starts)Torque converter clutchL1
Slip or shudder (R position)1. Reverse clutch (C2)
2. 1st & reverse brake (B
2)
L
L
Slip or shudder ( 1st)
1. Forward clutch (C1)
2. One −way clutch No. 1(F
1)
3. U/D one −way clutch (F
2)
L
L
Slip or shudder (2nd)2nd & O/D brake (B1)L
Slip or shudder (3rd)Direct and O/D clutch (C0)L
Slip or shudder (4th)2nd & O/D brake (B1)L
Slip or shudder (5th)U/D clutch (C3)L
No engine braking ( 1st 4th: D position)U/D brake (B3)L
No engine braking ( 1st: L ( 1) position)1. Valve body assy
2. 1st & reverse brake (B
2)
40 −1 9
L
No engine braking (2nd: 2 position)1 . Valve body assy
2. 2nd & O/D brake (B
1)
40 −1 9
L
No engine braking (3rd: 3 position)U/D brake (B3)L
Poor acceleration (All positions)Torque converter clutchL 1
Poor acceleration (5th)1. U/D clutch (C3)
2. U/D planetary gear unitL
L
Engine stalls when starting off or stoppingTorque converter clutchL 1
No kick −downValve body assy40 −1 9
Page 4553 of 5135
![TOYOTA AVENSIS 2005 Service Repair Manual G23405Transmission Wire
− DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)05−539
AVENSIS Supplement (RM1045E)
(9) Disconnect the connector of the transmission wire.
HINT:
Disconn TOYOTA AVENSIS 2005 Service Repair Manual G23405Transmission Wire
− DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)05−539
AVENSIS Supplement (RM1045E)
(9) Disconnect the connector of the transmission wire.
HINT:
Disconn](/manual-img/14/57441/w960_57441-4552.png)
G23405Transmission Wire
− DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U151E)05−539
AVENSIS Supplement (RM1045E)
(9) Disconnect the connector of the transmission wire.
HINT:
Disconnect the connector only when performing the D position
stall test.
(10) Start the engine.
(11) Firmly depress the brake pedal, shift to the D posi-
tion, depress the accelerator pedal all the way down
and check the line pressure while the stall test is
performed.
Specified line pressure:
ConditionD position
Stall test931to1,031kPa
(9.5 to10.5 kgf/cm2,135 to150 psi)
(12) Turn the ignition switch off.
(13) Remove the SST, install the test plug A.
(14) Remove the test plug B, install the SST and start en-
gine.
SST 09992−00095 (09992−00231, 09992−00271)
(15) Connect the transmission wire connector, depress
the brake pedal firmly, shift to the R position and
check that the line pressure while the engine is id-
ling and during the stall test.
Specified line pressure:
ConditionR position
Idling672 to 742 kPa
(6.9 to 7.6 kgf/cm2,97to108 psi)
Stall test1,768 to1,968 kPa
(18.0 to 20.1kgf/cm2, 256 to 285 psi)
(16) Remove the SST, install the test plug B.
(17) Clear the DTC.
Evaluation:
ProblemPossible cause
If the measured values at all position are higherSShift solenoid valve (SLT) defective
SRegulator valve defective
If the measured values at all position are lower
SShift solenoid valve (SLT) defective
SRegulator valve defective
SOil pump defective
SU/D (Underdrive) direct clutch defective
If pressure is low in the D position onlySD position circuit fluid leak
SForward clutch defective
If pressure is low in the R position only
SR position circuit fluid leak
SReverse clutch defective
S1st and reverse brake defective