2005 TOYOTA AVENSIS Circuit

B16200
A67446
FC (+)
E9E11
E1 (±)
ECM Connector
±
DIAGNOSTICS SFI SYSTEM(1AZ±FSE)
05±509
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1PERFORM ACTIVE TEST BY HAND±HELD TESTER(OPERATION OF CIRCUIT
OPENING RELAY)
(a)Turn the ignition switch ON.
(b)Select the item ºDIAGNOSIS / OBD/MOBD / ACTIVE TEST / FUEL PUMP/SPDº\
.
(c)Perform the ACTIVE TEST with the engine stopped.
Result: The circuit opening relay operates.
NGGo to step 2
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
(See page 05±320)
2INSPECT CIRCUIT OPENING RELAY
(a)Remove the circuit opening relay.
(b)Inspect the circuit opening relay. Standard:
Terminal No.Specified condition
1 ± 2Continuity
No Continuity
3 ± 5Continuity
(Apply battery voltage terminals 1 and 2)
NGREPLACE CIRCUIT OPENING RELAY
OK
3INSPECT ECM(FC 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
FC (E9±10) ± E1 (E11±1)9 to 14 V
NGGo to step 6
OK
4INSPECT FUEL PUMP ASSY (See page 11±36)
NG REPLACE FUEL PUMP ASSY
OK

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


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

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.

05±494
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)DTC No.
DTC Detection ConditionTrouble Area
P2120
Condition (a) continues for 0.5 sec. or more:
(a) VPA less than 0.2 V and VPA2 greater than 0.97 deg, or
VPA greater than 4.8 V
P2122
Conditions (a) and (b) continue for 0.5 sec. or more:
(a) VPA less than 0.2 V
(b) VPA2 greater than 0.97 deg
P2123Condition (a) continues for 2.0 sec. or more:
(a) VPA greater than 4.8 V
P2125
Condition (a) continues for 0.5 sec. or more:
(a) VPA2 less than 0.5 V and VPA greater than 0.97 deg, or
VPA2 greater than 4.8 V and VPA greater than 0.2 V but
less than 3.45 V

Open or short in accelerator pedal position sensor circuit

Accelerator pedal position sensor

ECM
P2127
Conditions (a) and (b) continue for 0.5 sec. or more:
(a) VPA2 less than 0.5 V
(b) VPA greater than 0.97 deg
P2128
Conditions (a) and (b) continue for 2.0 sec. or more:
(a) VPA2 greater than 4.8 V
(b) VPA greater than 0.2 V but less than 3.45 V
P2138
Condition (a) or (b) continues for 2.0 sec. or more:
(a) Difference between VPA and VPA2 less than 0.02 V
(b) VPA less than 0.2 V and VPA2 less than 0.5 V
HINT:
After confirming ºDTC P2120, P2122, P2123, P2125, P2127, P2128 and P2138º, use the hand±held tester
to confirm the accelerator pedal position sensor output voltage.
Accelerator pedal position expressed as voltage output
Trouble areaAccelerator pedal releasedAccelerator pedal depressed
ACCEL POS #1ACCEL POS #2ACCEL POS #1ACCEL POS #2
VCP circuit open0 V0 V0 V0 V
VPA circuit open or ground short0 V1.5 to 2.9 V0 V3.5 to 5.5 V
VPA2 circuit open or ground short0.5 to 1.1 V0 V2.5 to 4.6 V0 V
EP circuit open5 V5 V5 V5 V