2005 TOYOTA AVENSIS diagnostic

3
2
145678
910111213141516
DLC3
A04550
TC
DLC3
A65748
E9
ECM Connector TC
3
2
145678
910111213141516
DLC3
A04550
CGTC
DLC3
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±285
AVENSIS REPAIR MANUAL (RM1018E)
2CHECK HARNESS AND CONNECTOR(DLC3 ± ECM)
(a)Disconnect the E9 ECM connector.
(b)Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
TC (13) ± TC (E9±20)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
TC (13)or TC (E9±20) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPAIR HARNESS AND CONNECTOR
3CHECK CHK ENG CONDITION
SST09843±18040 (a)Turn the ignition switch ON.
(b)Connect between terminals TC and CG of the DLC3 con-nector.
(c)Check that the CHK ENG blinks. Standard: CHK ENG blinks
NGCHECK AND REPLACE ECM (See page 01±32)
OK
NO PROBLEM

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