ignition TOYOTA AVENSIS 2005 Service Service Manual

A75744
ECM
Engine Coolant
Temperature Sensor
A65743ECM Connector
E13
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±37
AVENSIS REPAIR MANUAL (RM1018E)
5READ VALUE OF HAND±HELD TESTER(CHECK FOR SHORT IN ECM)
(a)Disconnect the E13 ECM connector.
(b)Disconnect the engine coolant temperature sensor con-
nector.
(c)Turn the ignition switch ON.
(d)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / COOLANT TEMPº and read its value displayed on
the hand±held tester.
Temperature: ±40
C (±40
F)
OKREPAIR OR REPLACE HARNESS OR CONNECTOR
NG
CHECK AND REPLACE ECM (See page 01±32)

A72925
A6
Intake Air Temp. Sensor
(built in Mass Air Flow Meter)
4
5 G±R
BR E2
THA ECM
20
E13
E13 28 5V
R
THA
E2
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±31
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:

Read freeze frame data using \f \b\f\f
 Freeze frame data records the engine conditions
when a malfunction is detected. When troubleshooting, it is useful for d\
etermining whether the vehicle
was running or stopped, the engine was warmed up or not, the air±fuel ra\
tio was lean or rich, etc. at
the time of the malfunction.

If different DTCs that are related to a different system are output simultaneously while terminal E2 is
used as a ground terminal, terminal E2 may be open.
1READ VALUE OF HAND±HELD TESTER(INTAKE AIR TEMPERATURE)
(a)Connect the hand±held tester to the DLC3.
(b)Turn the ignition switch ON.
(c)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / INTAKE AIRº and read its value dis- played on the hand±held tester.
Temperature: The same as actual intake air temperature
Result:
Temperature DisplayedProceed to
±40 C (±40 F)A
140 C (284 F) or moreB
OK (Same as present temperature)C
HINT:

If there is an open circuit, the hand±held tester indicates ±40
C (±40
F).

If there is a short circuit, the hand±held tester indicates 140
C (284
F) or more.
BGo to step 4
CCHECK FOR INTERMITTENT PROBLEMS (See Page 05±5)
A

A75743
Mass Air flow meterECM
A54396
A6
Wire Harness Side
Mass Air Flow Meter Connector E2
THA
A75742
ECM
Mass Air flow meter
A18294
THAE2
ECM Connector
E13
05±32
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
2READ VALUE OF HAND±HELD TESTER(CHECK FOR OPEN IN HARNESS)
(a)Disconnect the mass air flow meter connector.
(b)Connect terminals THA and E2 of the mass air flow meter connector.
(c)Turn the ignition switch ON.
(d)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / INTAKE AIRº and read its value displayed on the
hand±held tester.
Temperature value: 140
C (284
F) or more
OKREPLACE MASS AIR FLOW METER
NG
3READ VALUE OF HAND±HELD TESTER(CHECK FOR OPEN IN ECM)
(a)Disconnect the mass air flow meter connector.
(b)Connect terminals THA and E2 of the E13 ECM connec- tor.
HINT:
Before checking, do a visual and contact pressure check for the
ECM connector.
(c)Turn the ignition switch ON.
(d)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / INTAKE AIRº and read its value displayed on the
hand±held tester.
Temperature value: 140
C (284
F) or more
NGCHECK AND REPLACE ECM (See page 01±32)
OK
REPAIR OR REPLACE HARNESS OR CONNECTOR

A75766
ECM
Mass Air flow meter
A75744
ECM
Mass Air flow meter
A65743
E13
ECM Connector
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±33
AVENSIS REPAIR MANUAL (RM1018E)
4READ VALUE OF HAND±HELD TESTER(CHECK FOR SHORT IN HARNESS)
(a)Disconnect the mass air flow meter connector.
(b)Turn the ignition switch ON.
(c)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST
/ ALL / INTAKE AIRº and read its value displayed on the
hand±held tester.
Temperature: ±40
C (±40
F)
OKREPLACE MASS AIR FLOW METER
NG
5READ VALUE OF HAND±HELD TESTER(CHECK FOR SHORT IN ECM)
(a)Disconnect the E13 ECM connector.
(b)Turn the ignition switch ON.
(c)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / INTAKE AIRº and read its value displayed on the
hand±held tester.
Temperature value: ±40
C (±40
F)
OKREPAIR OR REPLACE HARNESS OR CONNECTOR
NG
CHECK AND REPLACE ECM (See page 01±32)

A79095
Battery FL
MAINB±Y
E12BATT
BR
E1 E9
IO1 1 EFI
7 7
3
EHECM Engine Room R/B No.1 and
Engine Room J/B No.1
2 1
1AB±Y
*1: LHD
*2: RHD IE37
*1
*2 1
Engine Room
J/B No.4 4A 1
4B 1B±G
B±G
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±119
AVENSIS REPAIR MANUAL (RM1018E)
DTC P1600 ECM BATT MALFUNCTION
CIRCUIT DESCRIPTION
Battery positive voltage is applied to terminal BATT of the ECM even the ignition switch is OFF for the DTC
memory and air±fuel ratio adaptive control value memory, etc.
DTC No.DTC Detecting ConditionTrouble Area
P1600Open in back up power source circuit
Open in back up power source circuit

ECM
HINT:
If DTC P1600 is displayed, the ECM does not store other DTCs.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using    
 Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running
or stopped, the engine was warmed up or not, the air±fuel ratio was lean or rich, etc. at the time of the mal-
function.
05B49±02

A66054
Engine Room R/B No.1EFI Fuse
A18294
BATT (+)E1 (±)
ECM Connector
E9E12
05±120
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
1CHECK FUSE(EFI FUSE)
(a)Remove the EFI fuse from the engine room R/B No.1.
(b)Check for continuity in the EFI fuse. Standard: Continuity
NGCHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED FUSE
OK
2INSPECT ECM(CHECK VOLTAGE)
(a)Turn the ignition switch ON.
(b)Measure the voltage between the terminals of the E9 and E12 ECM connector.
Standard:
Symbols (Terminal No.)Specified condition
BATT (E9±3) ± E1 (E12±7)8 to 14 V
OKCHECK AND REPLACE ECM (See page 01±32)
NG

± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±115
AVENSIS REPAIR MANUAL (RM1018E)
DTC P1520 STOP LIGHT SWITCH CIRCUIT
MALFUNCTION
CIRCUIT DESCRIPTION
This signal is used to detect that the brakes have been applied. The STP signal voltage is the same as the
one supplied to the stop lights.
The STP signal is used mainly to control the fuel cut±off engine speed (The fuel cut±off engine speed is re-
duced slightly when the vehicle is braking.).
DTC No.DTC Detecting ConditionTrouble Area
P1520
Condition (a), (b) and (c) continue for 0.5 sec. or more:
(a) Ignition switch ON
(b) Brake pedal released
(c) STP signal is OFF when the STP signal is OFF
Open or short in stop light switch signal circuit

Stop light switch

ECM
05B48±02

± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±117
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using    
 Freeze frame data records the engine conditions when
a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running
or stopped, the engine was warmed up or not, the air±fuel ratio was lean or rich, etc. at the time of the mal-
function.
1 CHECK OPERATION OF STOP LIGHT
(a) Check if the stop lights go on and off normally when the brake pedal is depressed and released.
NG REPAIR OR REPLACE STOP LAMP SWITCH
CIRCUIT
OK
2 READ VALUE OF HAND±HELD TESTER
(a) Connect the hand±held tester to the DLC3.
(b) Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / STOP LIGHT SWº and read its value
displayed the hand±held tester.
(c) Turn the ignition switch ON and push the hand±held tester main switch ON.
(d) Read the STP signal on the hand±held tester.
Result:
Brake PedalSTP Signal
DepressedON
ReleasedOFF
OK CHECK FOR INTERMITTENT PROBLEMS
NG

A18294
OCV+OCV±
ECM Connector
E13
A58701A58701
OCV Signal Waveform1 m sec./Division 5 V/
Division
GND
(A)(A)(A)
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±113
AVENSIS REPAIR MANUAL (RM1018E)
2PERFORM ACTIVE TEST BY HAND±HELD TESTER(OPERATE OF OCV)
(a)Start the engine and warm it up.
(b)Connect the hand±held tester and select VVT from the ACTIVE TEST menu\
.
(c)Check the engine speed while operating the OCV by the hand±held teste\
r.
OCV is OFF: Normal engine speed
OCV is ON: Rough idle or engine stall
HINT:
DTC P1349 is also output when a foreign object is detected in some parts\
of the system in engine oil, and
then the system returns to normal in a short time. There is also no problem \
on the VVT as the oil filter should
catch the foreign object in engine oil.
OKVVT SYSTEM OK
NG
3INSPECT ECM(CHECK VOLTAGE)
(a)Turn the ignition switch ON.
(b)Check the waveform between terminals OCV+ and OCV± of the E13 ECM connector.
HINT:

The correct waveform is as shown on the left.

The waveform frequency (A) becomes longer as the en-
gine speed becomes higher.
NGCHECK AND REPLACE ECM (See page 01±32)
OK
4INSPECT CAMSHAFT TIMING GEAR ASSY (See page14±64)
NG REPLACE VVT CONTROLLER ASSEMBLY, AND THEN GO TO NEXT STEP
OK

± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±103
AVENSIS REPAIR MANUAL (RM1018E)
DTC P1300 IGNITER CIRCUIT MALFUNCTION (NO.1)
DTC P1305 IGNITER CIRCUIT MALFUNCTION (NO.2)
DTC P1310 IGNITER CIRCUIT MALFUNCTION (NO.3)
DTC P1315 IGNITER CIRCUIT MALFUNCTION (NO.4)
CIRCUIT DESCRIPTION
HINT:

If DTC P1300 is displayed, check No.1 ignition coil with igniter circuit.

If DTC P1305 is displayed, check No.2 ignition coil with igniter circuit.

If DTC P1310 is displayed, check No.3 ignition coil with igniter circuit.

If DTC P1315 is displayed, check No.4 ignition coil with igniter circuit.
A Direct Ignition System (DIS) has been adopted. The DIS improves the ignition timing accuracy, reduces
the high±voltage loss, and enhances overall reliability of the ignition system by eliminating the distributor.
The DIS is a 1±cylinder ignition system which ignites one cylinder with one ignition coil. In the 1±cylinder
ignition system, the spark plug is connected to the end of the secondary coil. High voltage generated in the
secondary coil is applied directly to the spark plug. The spark of the spark plug passes through from the cen-
ter electrode to the ground electrode.
The ECM determines ignition timing and outputs the ignition (IGT) signals of each cylinder. Based on IGT
signals, the power transistors cut off the current to the primary coil in the ignition coil. At the same time, the
igniter also sends an ignition confirmation (IGF) signal as a fail±safe measurement to the ECM.
05C6E±01