TOYOTA AVENSIS 2005 Service Repair Manual

± 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

A73818
Crankshaft
Position
Sensor
Camshaft
Position
Sensor
Various
SensorIGT1
IGF
IGT2
IGT3
IGT4 ECM
No. 1 Spark Plug
No. 2 Spark Plug
No. 3 Spark Plug
No. 4 Spark Plug Ignition Coil
Assy No. 1 IgniterFrom Battery
Ignition Coil
Ignition Coil
Assy No. 2
Ignition Coil
Assy No. 3
Ignition Coil
Assy No. 4
TA C
To Tachometer 05±104
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)DTC No.
DTC Detecting ConditionTrouble Area
P1300
P1305
P1310
P1315
No IGF signal to the ECM while engine is running

Ignition system

Open or short in IGF or IGT1 circuit from No. 1 ignition coil
with igniter to ECM

No.1 ± No.4 ignition coil with igniter

ECM


A79093
ECM
EH W±B E13
IGT1
IGF
E13
E13
E13
E13 23 IGT2
IGT3
IGT4
8
10
11
R±W
3
2
1
I1
Ignition Coil and
Igniter No.1
I2
Ignition Coil and
Igniter No.2
I3
Ignition Coil and
Igniter No.3
I4
Ignition Coil and
Igniter No.4
R±B
W±B 4 3
2
B±R
1
1
1
B±R
R±B
33
2
2
L±YW±R
W±R W±R
4 4 4
W±B
W±B
W±B
W±B
R±B
W±R
R±B R±B
From Terminal 3
of IG2 Relay
(See Page 05±124)
W±B LG±B
P
W±R
W±R
W±R 9
R±B 1N2
Noise
Filter R±B
8 EA1
±
DIAGNOSTICS SFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±105
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM

A18294
IGT4IGT3IGT2IGT1
ECM Connector
E1
E13E12
IGF
A63956
CH1
(IGT1 ± 4)
CH2
(IGF1)
GND
GND
05±106
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
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 determi\
ning whether the vehicle was running
or stopped, the engine was warmed up or not, the air±fuel ratio was lea\
n or rich, etc. at the time of the mal-
function.
1PERFORM SIMULATION TEST
(a)Clear the DTC (See page 05±5)
(b)Shuffle arrangement of the ighition coil and igniters.
NOTICE:
Do not shuffle the connectors.
(c)Perform the simulation test.
(d)Clear the DTC (See page 05±5) Result:
Display (DTC output)Proceed to
The same DTC is output againA
The other DTC is outputB
BREPLACE IGNITION COIL
A
2INSPECT ECM(IGT1, IGT2, IGT3, IGT4 AND IGF SIGNAL)
(a)Inspection using the oscilloscope.
(b)During cranking or idling, check the waveform between terminals IGT1 to IGT4 and E1, and IGF1 and E1 of the
ECM connector.
Standard:
ItemContents
TerminalCH1: IGT1, IGT2, IGT3, IGT4 ± E1
CH2: IGF ± E1
Equipment Set2V/DIV, 20ms/DIV
ConditionWhile the engine is cranking or idling
HINT:
Correct waveform is as shown in the diagram on the left.
NGCHECK AND REPLACE ECM (See page 01±32)
OK

A54393
+B (+) GND (±)
Ignition Coil and Igniter Connector Wire Harness Side
I1
I2I3I4
A65743
E13
ECM Connector
IGT4IGT3
IGT2IGT1
IGF
A54393
IGT Wire Harness Side
Ignition Coil and Igniter ConnectorIGF I1
I2I3I4
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
05±107
AVENSIS REPAIR MANUAL (RM1018E)
3 INSPECT IGNITION COIL(POWER SOURCE)
(a) Disconnect the ignition coil and igniter connector.
(b) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
GND (I1±4) ± Body ground
GND (I2±4) ± Body groundContinuityGND (I3±4) ± Body groundContinuity
GND (I4±4) ± Body ground
(c) Turn the ignition switch ON.
(d) Measure the voltage between the terminals of the ignition
coil and igniter connector.
Standard:
Symbols (Terminal No.)Specified condition
+B (I1±1) ± GND (4)
+B (I2±1) ± GND (4)9to14V+B (I3±1) ± GND (4)9 to 14 V
+B (I4±1) ± GND (4)
NG Go to step 5
OK
4 CHECK HARNESS AND CONNECTOR(ECM ± IGNITION COIL)
HINT:
The procedure below is for No.1 cylinder. If a malfunction is
found on other cylinders, check the circuit for the cylinder with
referring to this procedure.
(a) Disconnect the ignition coil and igniter connector.
(b) Disconnect the E13 ECM connector.
(c) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
IGT (I1±3) ± IGT1 (E13±8)
IGT (I2±3) ± IGT2 (E13±9)
IGT (I3±3) ± IGT3 (E13±10)
IGT (I4±3) ± IGT4 (E13±11)ContinuityIGF (I1±2) ± IGF (E13±23)Continuity
IGF (I2±2) ± IGF (E13±23)
IGF (I3±2) ± IGF (E13±23)
IGF (I4±2) ± IGF (E13±23)

B16200
05±108
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
Standard (Check for short):
Symbols (Terminal No.)Specified condition
IGT (I1±3) or IGT1 (E13±8) ± Body ground
IGT (I2±3) or IGT2 (E13±9) ± Body ground
IGT (I3±3) or IGT3 (E13±10) ± Body ground
IGT (I4±3) or IGT4 (E13±11) ± Body groundNo continuityIGF (I1±2) or IGF (E13±23) ± Body groundNo continuity
IGF (I2±2) or IGF (E13±23) ± Body ground
IGF (I3±2) or IGF (E13±23) ± Body ground
IGF (I4±2) or IGF (E13±23) ± Body ground
NG REPLACE HARNESS OR CONNECTOR
OK
REPLACE IGNITION COIL
5 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

A54393
+B
Ignition Coil and Igniter Connector
Wire Harness Side
I1
I2I3I4

A79064IG2 Relay
Engine Room R/B No.4
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±109
AVENSIS REPAIR MANUAL (RM1018E)
6CHECK HARNESS AND CONNECTOR(IG2 RELAY ± IGNITION COIL)
(a)Disconnect the ignition coil and igniter connector.
(b)Remove the IG2 relay from the engine room R/B No.4.
(c)Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
+B (I1±1) ± IG2 relay (3)
+B (I2±1) ± IG2 relay (3)Continuity+B (I3±1) ± IG2 relay (3)Continuity
+B (I4±1) ± IG2 relay (3)
Standard (Check for short):
Symbols (Terminal No.)Specified condition
+B (I1±1) or IG2 relay (3) ± Body ground
+B (I2±1) or IG2 relay (3) ± Body groundNocontinuity+B (I3±1) or IG2 relay (3) ± Body groundNo continuity
+B (I4±1) or IG2 relay (3) ± Body ground
NGREPLACE HARNESS OR CONNECTOR
OK
7CHECK FUSE(IGN FUSE) (See page 05±124)
NG CHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED FUSE
OK

A66267
IG2 Wire Harness Side
Ignition Switch Connector
I13
A79103
Driver Side J/B
IGN Fuse12

A79064
Engine Room R/B No.4
IG2 Relay
05±110
± DIAGNOSTICSSFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
8 CHECK HARNESS AND CONNECTOR(IGNITION SWITCH ± IG2 RELAY)
(a) Disconnect the battery negative (±) terminal.
(b) Disconnect the ignition switch connector.
(c) Remove the IGN fuse from the driver side J/B.
(d) Remove the IG2 relay from the engine room R/B No.4.
(e) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
IG2 (I13±6) ± IGN fuse (1)ContinuityIGN fuse (2) ± IG2 relay (1)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
IG2 (I13±6) or IGN fuse (1) ± Body groundNo continuityIGN fuse (2) or IG2 relay (1) ± Body groundNo continuity
NG REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE POWER SOURCE CIRCUIT

A58697
Intake Air
Chamber
Throttle Valve
To Cylinder
ISC Valve
Valve
ECM
Signal From
Air
Cleaner
From
Terminal 2 of
EFI No.1 Fuse
(See Page 05±124)
A79101
2 VISC DUTY1
GND 3
I10
ISC Valve
G±R5
E13 RSDECM
B±R 12
EA1 B±R
W±B7
E13 E01
W±B
EG
05±100
±
DIAGNOSTICS SFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0505 IDLE CONTROL SYSTEM MALFUNCTION
CIRCUIT DESCRIPTION
The rotary solenoid type of the idle speed control (ISC) valve is
located under the throttle body and intake air bypassing the
throttle valve is directed to the ISC valve through the passage.
In this way the intake air volume bypassing the throttle valve is
regulated, controls the engine speed.
The ECM operates the ISC valve only to perform idle±up and
provide feedback for the target idling speed.
DTC No.DTC Detecting ConditionTrouble Area
P0505Idle speed continues to vary greatly from target speed
(1 trip detection logic)

Open or short in ISC valve circuit

ISC valve is stuck or closed

PCV hose

A/C switch circuit

Air induction system

ECM
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 determi\
ning whether the vehicle was running
or stopped, the engine was warmed up or not, the air±fuel ratio was lea\
n or rich, etc. at the time of the mal-
function.
05B46±02

123
A66264VISC (+)GND (±)
ISC valve Connector
Wire Harness Side
I10
±
DIAGNOSTICS SFI SYSTEM(1ZZ±FE/3ZZ±FE)
05±101
AVENSIS REPAIR MANUAL (RM1018E)
1PERFORM ACTIVE TEST USING HAND±HELD TESTER(CHECK ISC VALVE
OPERATION)
(a)Warm up the engine to the normal operating temperature.
(b)Switch off all the accessories.
(c)Switch off the A/C.
(d)Shift the lever to the neutral position.
(e)Connect the hand±held tester to the DLC3 on the vehicle.
(f)Select the item ºDIAGNOSIS / OBD/MOBD / ACTIVE TEST / ISC DUTY RATIOº.
(g)Check that the engine RPM varies when changing the ISC duty ratio.
Engine RPM:
Engine RPM fluctuates ups and downs in respose to the ISC duty ratio var\
iation.
OKCHECK FOR INTERMITTENT PROBLEMS (See page 05±5)
NG
2 CHECK HARNESS AND CONNECTOR
(a) Disconnect the ISC valve connector.
(b) Turn the ignition switch ON.
(c) Measure the voltage between the terminals of the ISC valve wire harness side connector.
Standard:
Symbols (Terminal No.)Specified condition
VISC (I10±2) ± GND (I10±3)9 to 14 V
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK