TOYOTA AVENSIS 2005 Service Repair Manual

05±144
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
9SYMPTOM SIMULATION
10DTC CHECK (See page 05±149)
AMalfunction code
BNo code
BGO TO STEP 12
A
11DTC CHART (See page 05±161)
GO TO STEP 14
12BASIC INSPECTION (See page 05±149)
AWrong parts not confirmed
BWrong parts confirmed
BGO TO STEP 17
A
13PROBLEM SYMPTOMS TABLE (See page 05±168)
AWrong circuit confirmed
BWrong parts confirmed
B GO TO STEP 17
A
14CHECK ECM POWER SOURCE CIRCUIT (See page 05±257)
15 CIRCUIT INSPECTION
AMalfunction not confirmed
BMalfunction confirmed
B GO TO STEP 18
A

±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±145
AVENSIS REPAIR MANUAL (RM1018E)
16CHECK FOR INTERMITTENT PROBLEMS (See page 05±149)
GO TO STEP 18
17 PARTS INSPECTION
18 IDENTIFICATION OF PROBLEM
19 ADJUSTMENT, REPAIR
20 CONFIRMATION TEST
END

05±146
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
When not using hand±held tester, troubleshoot in accordance with the proce-
dure shown below.
1VEHICLE BROUGHT TO WORKSHOP
2CUSTOMER PROBLEM ANALYSIS (See page 05±148)
3CHECK AND CLEAR DTC (See page 05±149)
4PROBLEM SYMPTOM CONFIRMATION
AMalfunction occurs
BMalfunction does not occur
BSYMPTOM SIMULATION (See page 01±22)
A
5DTC CHECK (See page 05±149)
AMalfunction code
BNo code
B GO TO STEP 7
A
6DTC CHART (See page 05±161)
GO TO STEP 9
7BASIC INSPECTION (See page 05±149)
AWrong parts not confirmed
BWrong parts confirmed
B GO TO STEP 12
A

±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±147
AVENSIS REPAIR MANUAL (RM1018E)
8PROBLEM SYMPTOMS TABLE (See page 05±168)
AWrong circuit confirmed
BWrong parts confirmed
BGO TO STEP 12
A
9CHECK ECM POWER SOURCE CIRCUIT (See page 05±257)
10CIRCUIT INSPECTION
AMalfunction not confirmed
BMalfunction confirmed
BGO TO STEP 13
A
11CHECK FOR INTERMITTENT PROBLEMS (See page 05±149)
GO TO STEP 13
12 PARTS INSPECTION
13 IDENTIFICATION OF PROBLEM
14 ADJUSTMENT, REPAIR
15 CONFIRMATION TEST
END

A81014
4 D5
DLC3
CGTC13
W±BCBW±L20
E9TCECM
W±L
W±B J8
J/C
BB
J16
J/C
A
IP
IOCenter J/B
CA 36
A(RHD) W±B
(RHD)
(LHD)W±B
(LHD) (LHD)W±L
(LHD)
W±L W±L
(RHD)
(RHD) J21D
J20BDB DC173 Driver Side J/B
3 2 1 45678
9 1 0 111 21 31 41 51 6
DLC3
A04550
CG (±)TC (+)
DLC3
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±141
AVENSIS REPAIR MANUAL (RM1018E)
TC TERMINAL CIRCUIT
CIRCUIT DESCRIPTION
Terminals TC and CG are located in the DLC3. When connecting these terminals, DTCs in normal mode or
check mode can be read through the CHK ENG flashing in the combination meter.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:

Even though terminal TC is not connected to terminal CG, the CHK ENG blinks.

For the above phenomenon, an open or short in the wire harness, or malfunction inside the ECM is
the likely cause.
1 CHECK DLC3(TC VOLTAGE)
(a) Turn the ignition switch ON.
(b) Measure the voltage between the terminals of the DLC3.
Standard:
Symbols (Terminal No.)Specified condition
TC (13) ± CG (4)9 to 14 V
OK Go to step 3
NG
05C6K±01

3
2
145678
910111213141516
DLC3
A04550
TC
DLC3
A65748
E9
ECM Connector TC
3
2
145678
910111213141516
DLC3
A04550
CGTC
DLC3
05±142
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
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 (DLC3 ± BODY GROUND)
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
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±139
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 illuminatedStart inspection from step 3
05C6J±01

A65748
E9
ECM Connector
05±140
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
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±5).
(d)Clear the DTC (See page 05±5).
(e)Check that the CHK ENG is OFF. Standard: CHK ENG is OFF
OKREPAIR CIRCUIT INDICATED BY OUTPUTCODE (See page 05±16)
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
OKSYSTEM OK
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 ASSEMBLY
OK
CHECK AND REPAIR HARNESS AND CONNECTOR (COMBINATION METER ± ECM)

± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±135
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.
05C6I±01

A79100
I13
Ignition Switch
45
B±RB±Y
6
1
ST
2
6Fuse
Block
B±W
B±R B±R
1
1
IP1 IE4
(*1)
(*2)
B±R
1
2
1
1A 1AM2Engine
Room
R/B No.1
and
Engine
Room
J/B No.1
B±GB±Y
55
ST
Relay 51
32
55J13J12 BB
CA9
6N1
Neutral
Start
SwitchB±Y
(*4)
ECM
STA B±Y9
E12 B±W
(*3)
B±Y
(*3)
A J13 J12
J12
Junction
Connector
Engine
Room
J/B No.4 4A 1
1
4B
B±G
FL MAIN
BatteryB±R
IJDriver
Side R/B
BW±B
Driver
Side J/B DJ 2
DA 9
W±B B
S4
S511
Stater IK1
7*1: LHD
*2: RHD
*3: A/T
*4: M/T 05±136
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM