TOYOTA AVENSIS 2005 Service Repair Manual

123
5
A79099
Wire Harness Side
Circuit Opening Relay Connector
C8
A67586
Wire Harness Side
Fuel Pump Connector
F25
B16200
05±510
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
5CHECK HARNESS AND CONNECTOR(CIRCUIT OPENING RELAY ± FUEL PUMP, FUEL PUMP ± BODY GROUND)
(a)Remove the circuit opening relay.
(b)Disconnect the F25 fuel pump connector.
(c)Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
Circuit opening relay (C8±3) ± Fuel pump (F25±4)ContinuityFuel pump (F25±5) ± Body groundContinuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
Circuit opening relay (C8±3) or Fuel pump (F25±4)
± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS ORCONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)
6 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

A79096
Driver Side J/B
IGN Fuse
A66267
Ignition Coil Connector
Wire Harness Side
IG2 I13

A79064IG2 Relay
Engine Room R/B No. 4

A81706
IG2 Fuse
Engine Room R/B No. 1
2
1
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±511
AVENSIS REPAIR MANUAL (RM1018E)
7 CHECK HARNESS AND CONNECTOR(IGNITION SWITCH ± IG2 RELAY, IG2 FUSE
± IG2 RELAY)
(a) Check harness and connector between the IG2 relay and
ignition switch.
(1) Inspect the IGN fuse.

Remove the IGN fuse from the driver side J/B.

Check for continuity in the IGN fuse.
Standard: Continuity

Reinstall the IGN fuse.
(2) Disconnect the I13 ignition switch connector.
(3) Remove the IG2 relay.
(4) Check for continuity between the wire harness side
connectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
IG2 (I13±6) ± IG2 relay (1)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
IG2 (I13±6) or IG2 relay (1) ± Body groundNo continuity
(b) Check harness and connector between the IG2 relay and
the IG2 fuse.
(1) Inspect the IG2 fuse.

Remove the IG2 fuse from the engine room
R/B No. 1.

Check for continuity in the IG2 fuse.
Standard: Continuity
(2) Remove the IG2 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
IG2 fuse (2) ± IG2 relay (5)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
IG2 fuse (2) or IG2 relay (5) ± Body groundNo continuity
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK


A79064IG2 Relay
Engine Room R/B No. 4
123
5
A79099Circuit Opening Relay Connector
Wire Harness Side
C8
A54404
FC
ECM Connector E9
05±512
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
8CHECK HARNESS AND CONNECTOR(IG2 RELAY ± CIRCUIT OPENING RELAY, CIRCUIT OPENING RELAY ± ECM)
(a)Remove the IG2 relay from the engine room R/B No. 4.
(b)Remove the circuit opening relay.
(c)Disconnect the E9 ECM connector.
(d)Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
IG2 relay (3) ± Circuit opening relay (C8±1)
Circuit opening relay (C8±2) ± FC (E9±10)Continuity
IG2 relay (2) ± Body ground
y
Standard (Check for short):
Symbols (Terminal No.)Specified condition
IG2 relay (3) or Circuit opening relay (C8±1) ± Body groundNocontinuityCircuit opening relay (C8±2) or FC (E9±10) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)

A76879
IP1I13
Ignition Switch
IGN Driver Side J/B
E9
E11ECM
Battery FL MAINEFI
No. 1
2
B±G2
118
9
18 4DH
2
E9E9
1 12 31 5
EFI
Relay
D
EFBR GR B±W
DA
J/C 1A
J28IGSW
+B2 MREL
E1
Engine Room
J/B No. 41 4A
4BEngine Room
R/B No. 1 and
Engine Room
J/B No. 1 1EFI AM2
1 211
1 2
B±G6
(RHD) IE4 1 (LHD)
B±R B±R B±R
4 4
4
4
4
4Engine Room
R/B No. 4
Engine
Room
R/B No. 4B±Y
B±W
B±R
ECW±B
B±RB±R B±R
(RHD) (LHD)
D J14 D J28 (RHD)(LHD)
D J14
D J28 D J141
E9 +B (RHD)
(LHD)B±W
B±W (RHD)
(LHD)B±W
J26A
J27E
J8
J/CJ/C
CC
IE12
GR
(LHD) (RHD)IP1 IE42
3
AM2 IG2
05±502
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
ECM POWER SOURCE CIRCUIT
CIRCUIT DESCRIPTION
When the ignition switch is turned ON, battery positive voltage is applied to terminal IGSW of the ECM and
the EFI relay (Marking: EFI) control circuit in the ECM sends a signal to terminal MREL of the ECM switching
on the EFI relay.
This signal causes current to flow to the coil, closing the contacts of the EFI relay and supplying power to
terminals +B and +B2 of the ECM.
If the ignition switch is turned off, the ECM continues to switch on the EFI relay for maximum 2 seconds for
the initial setting of the throttle valve.
WIRING DIAGRAM
05CK0±01

A67446
E1 (±)+B (+)
ECM Connecter
E11E9
A81698
E1
E11
ECM Connecter
A67446ECM Connecter
E11E9
E1 (±)IGSW (+)
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±503
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1INSPECT ECM(+B VOLTAGE)
(a)Turn the ignition switch ON.
(b)Measure the voltage between the specified terminals of
the E9 and E11 ECM connectors.
Standard:
Symbols (Terminal No.)Specified condition
+B (E9±1) ± E1 (E11±1)9 to 14 V
OKPROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
(See page 05±320)
NG
2 CHECK HARNESS AND CONNECTOR(ECM ± BODY GROUND)
(a) Disconnect the battery negative (±) terminal.
(b) Disconnect the E11 ECM connector.
(c) Check for continuity between the wire harness side con- nector.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
E1 (E11±1) ± Body groundContinuity
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
3 INSPECT ECM(IGSW VOLTAGE)
(a) Turn the ignition switch ON.
(b) Measure the voltage between the specified terminals of the E9 and E11 ECM connectors.
Standard:
Symbols (Terminal No.)Specified condition
IGSW (E9±9) ± E1 (E11±1)9 to 14 V
OK Go to step 6
NG

A79096
Driver Side J/BIGN Fuse
B50489Ignition Switch
I13
Component Side
A67446ECM Connecter
E11E9
E1 (±)MREL (+)
05±504
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
4CHECK FUSE(IGN FUSE)
(a)Remove the IGN fuse from the driver side J/B.
(b)Check for continuity in the IGN fuse. Standard: Continuity
NGCHECK FOR SHORT IN ALL HARNESSES AND COMPONENTS CONNECTED FUSE
OK
5INSPECT IGNITION OR STARTER SWITCH ASSY
(a)Measure the resistance between the connector terminals shown in the chart below.
SwitchTerminal No.Resistance
LOCKAll Terminals1 M
or more
ACC1±31
or less
ON1±2, 1±3, 2±3, 5±61
or less
START4±5, 4±6, 5±6, 1±21
or less
NGREPLACE IGNITION OR STARTER SWITCH
ASSY
OK
CHECK AND REPAIR HARNESS AND CONNECTOR(BATTERY ± IGNITION SWITCH, IGNITION
SWITCH ± ECM)
6INSPECT ECM(MREL VOLTAGE)
(a)Turn the ignition switch ON.
(b)Measure the voltage between the specified terminals of the E9 and E11 ECM connectors.
Standard:
Symbols (Terminal No.)Specified condition
MREL (E9±8) ± E1 (E11±1)9 to 14 V
NGCHECK AND REPLACE ECM (See page 01±32)
OK

A66054
Engine Room R/B No. 1
EFI Fuse
B16200


 
A79065
Engine Room R/B No. 4
EFI No.1 Fuse
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±505
AVENSIS REPAIR MANUAL (RM1018E)
7 CHECK 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
NG CHECK FOR SHORT IN ALL HARNESSES AND
COMPONENTS CONNECTED FUSE
OK
8 INSPECT EFI RELAY
(a) Remove the EFI relay from the engine room R/B No. 4.
(b) Inspect the EFI relay.
Standard:
Terminal No.Specified condition
1 ± 2Continuity
No Continuity
3 ± 5Continuity
(Apply battery voltage terminals 1 and 2)
NG REPLACE EFI RELAY
OK
9 CHECK FUSE(EFI NO.1 FUSE)
(a) Remove the EFI No. 1 fuse from the engine room R/B No.
4.
(b) Check for continuity in the EFI No. 1 fuse.
Standard: Continuity
NG CHECK FOR SHORT IN ALL HARNESSES AND
COMPONENTS CONNECTED FUSE
OK

A66053
Engine Room R/B No. 4
EFI Relay



A79066
Engine Room R/B No. 4
EFI No.1 Fuse
1
2
A67445
MREL
E9
ECM Connector+B
Wire Harness Side
05±506
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
10 CHECK HARNESS AND CONNECTOR(EFI RELAY ± ECM, EFI RELAY ± BODY
GROUND)
(a) Check harness and connector between the EFI relay and
the ECM connector.
(1) Remove the EFI relay from the engine room R/B No.
4.
(2) Remove the EFI No.1 fuse from the engine room
R/B No. 4.
(3) Disconnect the E9 ECM connector.
(4) Check for continuity between the wire harness side
connectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
EFI relay (1) ± MREL (E9±8)
EFI relay (3) ± EFI No. 1 fuse (1)Continuity
EFI No. 1 fuse (2) ± +B (E9±1)
y
Standard (Check for short):
Symbols (Terminal No.)Specified condition
EFI relay (1) or MREL (E9±8) ± Body ground
EFI relay (3) or EFI No. 1 fuse (1) ± Body groundNo continuity
EFI No. 1 fuse (2) or +B (E9±1) ± Body ground
y
(b) Check harness and connector between the EFI relay and
the body ground.
(1) Remove the EFI relay from the engine room R/B No.
4.
(2) Check for continuity between the wire harness side
connector and the body ground.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
EFI relay (2) ± Body groundContinuity
OK REPAIR OR REPLACE HARNESS OR
CONNECTOR
NG
CHECK AND REPAIR HARNESS AND CONNECTOR(TERMINAL +B OF ECM ± BATTERY POSITIVE
TERMINAL)

05±492
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P2120 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ºDº CIRCUIT
DTC P2122 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ºDº CIRCUIT LOW INPUT
DTC P2123 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ºDº CIRCUIT HIGH INPUT
DTC P2125 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ºEº CIRCUIT
DTC P2127 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ºEº CIRCUIT LOW INPUT
DTC P2128 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ºEº CIRCUIT HIGH INPUT
DTC P2138 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ºDº/ºEº VOLTAGE
CORRELATION
HINT:
This is procedure of accelerator pedal position sensor.
05CKT±01

A71015
0
Accelerator Pedal Opening Angle (deg)125
VPA1 VPA2
5
Movable Range
Usable Range
Usable Range *1
*1
Movable Range
Usable Range
*2
Accelerator pedal released (15
)
Accelerator pedal depressed
(about 100
)
Accelerator Pedal
Position Sensor
Output Voltage (V)
VPA2VPA1 EP2
VCP2
*1:
*
2:
EP1
0.8
105
VCP1*2
*2*1
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±493
AVENSIS REPAIR MANUAL (RM1018E)
CIRCUIT DESCRIPTION
HINT:
This electrical throttle system is no used throttle cable.
The accelerator pedal position sensor is mounted on the accelerator pedal bracket and it have the 2 sensors
to detect the accelerator position and a malfunction of the accelerator position sensor.
In the accelerator pedal position sensor, the voltage applied to VPA1 and VPA2 of the ECM changes be-
tween 0 V and 5 V in proportion to the opening angle of the accelerator pedal. The VPA1 is a signal to indicate
the actual accelerator pedal opening angle which is used for the engine control, and the VPA2 is a signal
to indicate the information about VPA1 which is used for detecting a malfunction in VPA1.
The ECM monitors the current opening angle of the accelerator pedal from these signals input from VPA1
and VPA2, and controls the throttle motor based on these signals.