TOYOTA AVENSIS 2005 Service Repair Manual

A81015
Engine
Room
R/B No. 1
Engine
Room
J/B No. 1W
9ECM
W
E9 11
1 2
B±W22 1
4A
Battery4
2I13
Ignition
Switch
DH 6
B±R B±R
C11
Combination
Meter Assy
Check
Engine
Warning
Light AM2
IG2
AM2
Driver
Side
J/B
FL MAINEngine
Room
J/B
No. 4
4BB±G 1A 1B±R
IE41
(LHD)IP11
(RHD)
18 DA
J8C
(LHD)J26A
(RHD)J8C
(LHD)J26A
(RHD) J/CB±W IGN
1
1
B±G 05±282
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
CHECK ENGINE WARNING LIGHT CIRCUIT
CIRCUIT DESCRIPTION
If the ECM detects a trouble, the CHK ENG is illuminated. At this time, the ECM records a DTC in the memory.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Troubleshoot each trouble symptom in accordance with the chart below .
CHK ENG remains onStart inspection from step 1
CHK ENG is not illuminateStart inspection from step 3
05C7C±01

A65748
E9
ECM Connector
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±283
AVENSIS REPAIR MANUAL (RM1018E)
1CLEAR DTC
(a)Connect the hand±held tester to the DLC 3.
(b)Turn the ignition switch ON and push the hand±held tester main switch \
ON.
(c)Read the DTC (See page 05±149).
(d)Clear the DTC (See page 05±149).
(e)Check that the CHK ENG is OFF.
Standard: CHK ENG is OFF
OKREPAIR CIRCUIT INDICATED BY OUTPUTCODE (See page 05±161)
NG
2CHECK HARNESS AND CONNECTOR(CHECK FOR SHORT IN WIRE HARNESS)
(a)Disconnect the E9 ECM connector.
(b)Turn the ignition switch ON.
(c)Check that the CHK ENG is OFF. Standard: CHK ENG is OFF
OKCHECK AND REPLACE ECM (See page 01±32)
NG
CHECK AND REPAIR HARNESS AND CONNECTOR
3CHECK CHK ENG CONDITION
(a)Check that the CHK ENG is illuminated when turning the ignition switch O\
N. Standard: CHK ENG is illuminated
OKCHECK AND REPAIR HARNESS ANDCONNECTOR
NG
4INSPECT COMBINATION METER ASSY(CHK ENG CIRCUIT)
(a)See the combination meter troubleshooting on page 05±1509. NG REPAIR OR REPLACE BULB OR COMBINATIONMETER ASSEMBLYSYSTEM OK
OK
CHECK AND REPAIR HARNESS AND CONNECTOR

A76870
ECM
STA
E129
B±Y
IJW±BJ12
B B J13
J/C W±B 1 5
32 1AM2 2
B±G
B±R1
S51S4
Starter
Battery7
IK1
FL MAIN 4B 4A
Engine Room
J/B No. 4
BB 55
55 1
11A
B±GB±R
IE41
(LHD)IP11
(RHD)B±R
Engine
Room
R/B No. 1
Engine
Room
J/B No.1
Driver
Side R/BST
Relay
2DJ
9DA Driver
Side J/B B±R
B±RI13
Ignition Switch
45B±Y
B±Y
6
2ST 1
6 Fuse
Block
B±WB±YB±Y B±Y
J12 A C J13
A
J12 1
1
(M/T)
B±W
(A/T)
N1
Neutral Start SW96B±Y
(A/T) 05±278
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
STARTER SIGNAL CIRCUIT
CIRCUIT DESCRIPTION
When the engine is cranked, the intake air flow becomes slow, so fuel vaporization is poor. A rich mixture
is therefore necessary in order to achieve good startability. While the engine is being cranked, the battery
voltage is applied to terminal STA of the ECM. The starter signal is mainly used to increase the fuel injection
volume for the starting injection control and after±start injection control.
WIRING DIAGRAM
05C7B±01

±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±279
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
HINT:
This chart is on the premise that the engine is cranked normally. If the engine is not cranked, proceed to the
problem symptoms table on page 05±168.
When using hand±held tester:
1READ VALUE OF HAND±HELD TESTER(STA SIGNAL)
(a)Connect the hand±held tester to the DLC3.
(b)Turn the ignition switch ON and push the hand±held tester main switch \
ON.
(c)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / STARTER SIGº and read its value dis-
played on the hand±held tester.
Result:
Ignition Switch PositionONSTART
STA SignalOFFON
OKPROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
(See page 05±149)
NG

A65745
STA
E12
ECM Connector
A79097
Driver Side R/B
LHDStarter Relay
A79098
Driver Side R/B
RHD
Starter Relay
A18294
STA (+)E1 (±)
ECM Connector
E12
05±280
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
2CHECK HARNESS AND CONNECTOR
(a)Disconnect the E12 ECM connector.
(b)Remove the starter relay from the driver side R/B.
(c)Check for continuity between the wire harness side con- nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
Starter relay (1) ± STA (E12±9)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
Starter relay (1) or STA (12±9) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)
When not using hand±held tester:
1 INSPECT ECM(STA VOLTAGE)
(a) Turn the ignition switch ON.
(b) Measure the voltage between the terminals of the E12 ECM connector.
Standard:
Symbols (Terminal No.)Specified condition
STA (E12±9) ± E1 (E12±7)0 V

A65745
STA
E12
ECM Connector
A79097
Driver Side R/B
LHDStarter Relay
A79098
Driver Side R/B
RHD
Starter Relay
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±281
AVENSIS REPAIR MANUAL (RM1018E)
(c)Measure the voltage between the terminals of the E12
ECM connector when the engine is cranked.
Standard:
Symbols (Terminal No.)Specified condition
STA (E12±9) ± E1 (E12±7)6 V or more
OKPROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
(See page 05±149)
NG
2CHECK HARNESS AND CONNECTOR
(a)Disconnect the E12 ECM connector.
(b)Remove the starter relay from the driver side R/B.
(c)Check for continuity between the wire harness side con- nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
Starter relay (1) ± STA (E12±9)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
Starter relay (1) or STA (12±9) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)

A78423
20V
/Division Injector Signal Waveform
20V
/Division
GND
100 msec./Division (Idling)(Magnification)
GND
1 msec./Division (Idling)
Injection duration
05±272
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
FUEL INJECTOR CIRCUIT
CIRCUIT DESCRIPTION
The fuel injectors are located on the intake manifold.
They inject fuel into the cylinders based on the signals from the ECM.
Reference: Inspection using oscilloscope
With the engine idling, check the waveform between terminals #1 to #4 and E01 of the ECM connectors.
HINT:
The correct waveform is as shown in the diagram below.
05C7A±01

A76891
I13
Ignition SW
46
B±R
B±R
IE4(LHD)
1
1IP1
(RHD)DH
2
DL16 Driver
Side J/BIGN
B±R
1
AM2
IG2 1
2 2
1
1A 1
1Engine
Room
R/B No.1
Engine
Room
J/B No.1
B±G
4A 1
4B 1Engine
Room
J/B No.4B±R1 R±B2 I5
Injector No.1
B±R
Y
W
B1
#1
E13
2
#2
E13
#3 3
E13
4
#4
E13
7
E01
E13
E02 6
E13 W±B
W±BECM
R±B
R±B
R±B R±B
R±B12 I6
Injector No.2
12 I7
Injector No.3
12 I8
Injector No.4
EA1 8
4
13
25IG2
Relay
B W±B B
ECEE 4
4 4
Engine
Room
R/B No.4 B±G
FL MAIN
Battery
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
05±273
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM

A18294
#4#3#2#1E01
ECM Connector
E13
B16200
A79096
Driver Side J/BIGN Fuse
05±274
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1INSPECT ECM(#1, #2, #3 OR #4 VOLTAGE)
(a)Turn the ignition switch ON.
(b)Measure the voltage between the terminals of the E13 ECM connector.
Standard:
Symbols (Terminal No.)Specified condition
#1 (E13±1) ± E01 (E13±7)
#2 (E13±2) ± E01 (E13±7)9to14V#3 (E13±3) ± E01 (E13±7)9 to 14 V
#4 (E13±4) ± E01 (E13±7)
OKGo to step 7
NG
2INSPECT FUEL INJECTOR ASSY(CHECK RESISTANCE) (See page 11±22)
NG REPLACE FUEL INJECTOR ASSY
OK
3 INSPECT IG2 RELAY
(a) Remove the IG2 relay from the engine room R/B No.4.
(b) Inspect the IG2 relay. Standard:
Terminal No.Specified condition
1 ± 2Continuity
No Continuity
3 ± 5Continuity
(Apply battery voltage Terminals 1 and 2)
NG REPLACE IG2 RELAY
OK
4 CHECK FUSE(IGN FUSE)
(a) Remove the IGN fuse from the driver side J/B.
(b) Check for continuity in the IGN fuse. Standard: Continuity
NG CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED FUSE

A65743
E13
ECM Connector
#4#3#2#1

A79064
Engine Room R/B No.4
IG2 Relay
12
A61031
Wire Harness Side
I5
I6 I7 I8
Injector Connector
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
05±275
AVENSIS REPAIR MANUAL (RM1018E)
OK
5 CHECK HARNESS AND CONNECTOR OF MISFIRING CYLINDER(INJECTOR ±
ECM, INJECTOR ± IG2 RELAY)
(a) Check the harness and connector between the injector
connector and ECM connector.
(1) Disconnect the I5, I6, I7 or I8 injector connector.
(2) Disconnect the E13 ECM connector.
(3) Check for continuity between the wire harness side
connectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
Injector (I5±1) ± #1 (E13±1)
Injector (I6±1) ± #2 (E13±2)ContinuityInjector (I7±1) ± #3 (E13±3)Continuity
Injector (I8±1) ± #4 (E13±4)
Standard (Check for short):
Symbols (Terminal No.)Specified condition
Injector (I5±1) or #1 (E13±1) ± Body ground
Injector (I6±1) or #2 (E13±2) ± Body groundNo continuityInjector (I7±1) or #3 (E13±3) ± Body groundNo continuity
Injector (I8±1) or #4 (E13±4) ± Body ground
(b) Check the harness and connector between the injector
connector and ignition switch connector.
(1) Disconnect the I5, I6, I7 or I8 injector connector.
(2) Remove theIG2 relay from the engine room R/B
No.4.
(3) Check for continuity between the wire harness side
connectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
Injector (I5±2) ± IG2 Relay (3)
Injector (I6±2) ± IG2 Relay (3)ContinuityInjector (I7±2) ± IG2 Relay (3)Continuity
Injector (I8±2) ± IG2 Relay (3)
Standard (Check for short):
Symbols (Terminal No.)Specified condition
Injector (I5±2) or IG2 Relay (3) ± Body ground
Injector (I6±2) or IG2 Relay (3) ± Body groundNo continuityInjector (I7±2) or IG2 Relay (3) ± Body groundNo continuity
Injector (I8±2) or IG2 Relay (3) ± Body ground
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK