2005 TOYOTA AVENSIS Circuit

1
2
3
4
A93906
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −24 1
AVENSIS Supplement (RM1045E)
FUEL PUMP CONTROL CIRCUIT
CIRCUIT DESCRIPTION
Refer to DTC P0230 on page 05 −141.
WIRING DIAGRAM
Refer to DTC P0230 on page 05 −141.
INSPECTION PROCEDURE
1 CHECK FUEL PUMP OPERATION (See page 11− 4)
(a) Check if there is pressure in the fuel inlet hose.
HINT:
If there is fuel pressure, you will hear the sound of fuel flowing.
OK Go to step 9
NG
2 PERFORM ACTIVE TEST BY HAND −HELD TESTER(OPERATION OF CIRCUIT
OPENING RELAY)
(a) Connect the hand −held tester to the DLC3.
(b) Start the engine and warm it up.
(c) Turn the ignition switch to ON.
(d) Select the item: DIAGNOSIS / OBD/MOBD / ACTIVE TEST / FUEL PUMP/SPD.
(e) Check the relay operation when it is operated by the hand −held tester.
Standard: Operating sound can be heard from the relay.
OK Go to step 4
NG
3 INSPECT RADIATOR FAN RELAY
(a) Remove the R21 radiator fan relay.
(b) Check for continuity in the radiator fan relay relay. Standard:
Tester ConnectionSpecified Condition
1−2Continuity
3−4Continuity
1−2No Continuity
(Apply battery voltage to terminals 3 and 4)
(c) Reinstall the radiator fan relay relay.
NG REPLACE FUEL PUMP RELAY
OK
05HIS −01

B16200
05−242
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
4 INSPECT FUEL PUMP ASSY (See page 11− 7)
NG REPLACE FUEL PUMP ASSY
OK
5 INSPECT CIRCUIT OPENING RELAY
(a) Remove the C8 circuit opening relay.
(b) Check for continuity in the circuit opening relay. Standard:
Tester ConnectionSpecified Condition
1−2Continuity
3−5No Continuity
3−5Continuity
(Apply battery voltage to terminals 1 and 2)
(c) Reinstall the circuit opening relay.
NG REPLACE CIRCUIT OPENING RELAY
OK

123
5
A79099Circuit Opening Relay Connector
Wire Harness Side:
C8
A83889
Wire Harness Side:
Front View R21
Radiator fun Relay Connector
A67586
Wire Harness Side:
Fuel Pump Connector F25
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−243
AVENSIS Supplement (RM1045E)
6 CHECK HARNESS AND CONNECTOR(CIRCUIT OPENING RELY−RADIATOR FAN
RELAY, RADIATOR FAN RELAY−FUEL PUMP, FUEL PUMP−BODY GROUND)
(a) Check the harness and the connector between the circuit
opening relay and the radiator fan relay.
(1) Remove the C8 circuit opening relay.
(2) Remove the R21 radiator fan relay.
(3) Check the resistance between the wire harness
side connectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Circuit opening relay (C8−3)−Radiator fun relay (R21−2)Below 1

Circuit opening relay (C8−3)−Radiator fun relay (R21−4)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
Circuit opening relay (C8−3) or Radiator fun relay (R21−2)
−Body ground10 k
or higher
Circuit opening relay (C8−3) or Radiator fun relay (R21−4)
−Body ground10 k
or higher
(4) Reinstall the circuit opening relay.
(5) Reinstall the radiator fan relay relay.
(b) Check the harness and the connector between the fuel
pump relay and the fuel pump.
(1) Remove the R21 radiator fan relay.
(2) Disconnect the F25 fuel pump connector.
(3) Check the resistance between the wire harness
side connectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Radiator fun relay (R21−1)−Fuel pump (F25−4)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
Radiator fun relay (R21−1) or Fuel pump (F25−4)
−Body ground10 k
or higher
(4) Reinstall the radiator fan relay.
(5) Disconnect the fuel pump connector.
(c) Check the harness and the connector between the fuel
pump relay and the body ground.
(1) Disconnect the F25 fuel pump connector.
(2) Check the resistance between the wire harness
side connector and body ground.
Standard (Check for open):
Tester ConnectionSpecified Condition
Fuel pump (F25−5)−Body groundBelow 1

(3) Disconnect the fuel pump connector.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK

A67446
FC (+)
E9E11
E1 (−)
ECM Connector
12 3
5
A79099Circuit Opening Relay Connector
Wire Harness Side:
C8
A54404
FC
ECM Connector E9
A83890
Component Side:
F26
Fuel Pump Resistor
Front View
05−244
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
7 INSPECT ECM(FC VOLTAGE)
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the terminals of the E9 and E11 ECM connectors.
Standard:
Tester ConnectionSpecified Condition
FC (E9 −10) − E1 (E11 −1)9to 14V
NG PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
(See page 05 −1 0)
OK
8 CHECK HARNESS AND CONNECTOR(ECM −CIRCUIT OPENING RELAY)
(a) Remove the C8 circuit opening relay.
(b) Disconnect the E9 ECM connector.
(c) Check the resistance between the wire harness side con-
nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Circuit opening relay (C8 −2) −FC (E9 −10)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
Circuit opening relay (C8 −2) or FC (E9 −10) −Body ground10 k
or higher
(d) Reinstall the circuit opening relay.
(e) Reconnect the ECM connector.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
9 INSPECT FUEL PUMP RESISTOR
(a) Disconnect the F26 fuel pump resistor connector.
(b) Check the resistance between the terminals of the fuel pump resistor.
Standard:
Terminal No.Specified condition
1−20.30 to 0.34
at 20 ˚C (68 ˚F)
(c) Reconnect the fuel pump resistor connector.
NG REPLACE FUEL PUMP RESISTOR
OK

123
5
A79099Circuit Opening Relay Connector
Wire Harness Side:
C8
A83891
Wire Harness Side:
F26
Fuel Pump Resistor Connector
Front View
A67586
Wire Harness Side:
Fuel Pump Connector F25
B16200
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−245
AVENSIS Supplement (RM1045E)
10 CHECK HARNESS AND CONNECTOR(CIRCUIT OPENING RELAY−FUEL PUMP
RESISTOR, FUEL PUMP−FUEL PUMP RESISTOR)
(a) Check the harness and the connector between the circuit
opening relay and the fuel pump resistor.
(1) Remove the C8 circuit opening relay.
(2) Disconnect the F26 fuel pump resistor connector.
(3) Check the resistance between the wire harness
side connectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Circuit opening relay (C8−3)−Fuel pump resistor (F26−2)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
Circuit opening relay (C8−3) or Fuel pump resistor (F26−2)
−Body ground10 k
or higher
(4) Reinstall the circuit opening relay.
(5) Reconnect the fuel pump resistor connector.
(b) Check the harness and the connector between the fuel
pimp resistor and the fuel pump resistor.
(1) Disconnect the F25 fuel pump connector.
(2) Disconnect the F26 fuel pump resistor connector.
(3) Check the resistance between the wire harness
side connectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Fuel pump (F25−4)−Fuel pump resistor (F26−1)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
Fuel pump (F25−4) or Fuel pump resistor (F26−1)
−Body ground10 k
or higher
(4) Reconnect the fuel pump connector.
(5) Reconnect the fuel pump resistor connector.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR (See page10−65 of Pub. No.
RM1018E AVENSIS)
OK
11INSPECT IG2 RELAY
(a) Remove the IG2 relay from the engine room R/B No. 4.
(b) Check for continuity in the IG2 relay.
Standard:
Tester ConnectionSpecified Condition
1−2Continuity
3−5No Continuity
3−5Continuity
(Apply battery voltage to terminals 1 and 2)
(c) Reinstall the IG2 relay.

A66053A79064IG2 Relay
Engine Room R/B No. 4:
123
5
A79099Circuit Opening Relay Connector
Wire Harness Side:
C8
A54404
FC
ECM ConnectorE9
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
05−247
AVENSIS Supplement (RM1045E)
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
13 CHECK HARNESS AND CONNECTOR(IG2 RELAY−CIRCUIT OPENING RELAY,
CIRCUIT OPENING RELAY−ECM)
(a) Check the harness and the connector between the IG2
relay and the circuit opening relay.
(1) Remove the IG2 relay from the engine room R/B
No. 4.
(2) Remove the C8 circuit opening relay.
(3) Check the resistance between the wire harness
side connectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Engine room R/B No. 4 (IG2 relay terminal 3)−
Circuit opening relay (C8−1)Below 1

Engine room R/B No. 4 (IG2 relay terminal 3)−
Circuit opening relay (C8−5)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
Engine room R/B No. 4 (IG2 relay terminal 3) or
Circuit opening relay (C8−1)−Body ground10 k
or higher
Engine room R/B No. 4 (IG2 relay terminal 3) or
Circuit opening relay (C8−5)−Body ground10 k
or higher
(4) Reinstall the IG2 relay.
(5) Reinstall the circuit opening relay.
(b) Check the harness and the connector between the circuit
opening relay and the ECM.
(1) Remove the C8 circuit opening relay.
(2) Disconnect the E9 ECM connector.
(3) Check the resistance between the wire harness
side connectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Circuit opening relay (2)−FC (E9−10)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
Circuit opening relay (2) or FC (E9−10)−Body ground10 k
or higher
(4) Reinstall the circuit opening relay.
(5) Reconnect the ECM connector.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK

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
EEBR GR B−W
DA
J/C 1A
J28IGSW
+B2 MREL
E1
Engine Room
J/B No. 41 4A
4BEngine Room
R/B No. 1 1EFI
AM2
1 211
1 2
B−G6
(RHD) IE4 1 (LHD)
B−R B−RB−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 J14D 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
Engine Room
J/B No. 1 05−236
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
ECM POWER SOURCE CIRCUIT
CIRCUIT DESCRIPTION
When the ignition switch is turned ON, the positive battery voltage is applied to terminal IGSW of the ECM
and the EFI relay (Markied: 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 holds the EFI relay on for maximum of 2 seconds to allow for
the initial setting of the throttle valve.
WIRING DIAGRAM
05CK0−02

A67446
E1 (−)+B (+)
ECM Connecter
E11E9
A81698
E1
E11
ECM Connecter
A67446ECM Connecter
E11E9
E1 ( −)IGSW (+)
−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −237
AVENSIS Supplement (RM1045E)
INSPECTION PROCEDURE
1 INSPECT ECM(+B VOLTAGE)
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the terminals of the E9 and
E11 ECM connectors.
Standard:
Tester ConnectionSpecified Condition
+B (E9 −1) − E1 (E11 −1)9to 14V
OK PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
(See page 05 −1 0)
NG
2 CHECK HARNESS AND CONNECTOR(ECM −BODY GROUND)
(a) Disconnect the negative ( −) battery terminal.
(b) Disconnect the E11 ECM connectors.
(c) Check the resistance between the wire harness side con- nector.
Standard (Check for open):
Tester ConnectionSpecified Condition
E1 (E11 −1) −Body groundBelow 1

(d) Reconnect the ECM connector.
(e) Reconnect the negative battery terminal.
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
3 INSPECT ECM(IGSW VOLTAGE)
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the terminals of the E9 and E11 ECM connectors.
Standard:
Tester ConnectionSpecified Condition
IGSW (E9 −9) −E1 (E11 −1)9to14V
OK Go to step 6
NG