TOYOTA AVENSIS 2005 Service Repair Manual

−
DIAGNOSTICS SFI SYSTEM (2AZ−FSE)
05 −249
AVENSIS Supplement (RM 1045E)
STARTER SIGNAL CIRCUIT
CIRCUIT DESCRIPTION
When the engine is cranked, the intake air flow is slow, so fuel vaporization is poor. A rich mixture is therefore
necessary in order to achieve good startability. While the engine is being cranked, the battery voltage is ap-
plied to terminal STA of the ECM. The starter signal is mainly used to increase the fuel injection volume for
the starting injection control and after −start injection control.
WIRING DIAGRAM
Refer to DTC P06 17 on page 05 −203.
INSPECTION PROCEDURE
HINT:
This diagnostic troubleshooting procedure is on the premise that the engine is being cranked under normal
conditions. If the engine does not crank, proceed to the problem symptoms table on page 05 −1 0.
1 READ VALUE OF HAND −HELD TESTER(STARTER SIGNAL)
(a) Connect the hand −held tester to the DLC3.
(b) Turn the ignition switch to ON and turn the hand −held tester ON.
(c) On the hand −held tester, select the item: DIAGNOSIS / OBD/MOBD / DATA LIST / ALL / STARTER
SIG. Read the values.
Result:
Ignition Switch PositionONSTART
STA SignalOFFON
OK PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(See page 05 −1 0)
NG
05CJC −02

A81699
STA
E13
ECM Connector
A79097
ST Relay
Driver Side R/B:
LHD
A79098
ST Relay
Driver Side R/B:
RHD
05−250
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
2 CHECK HARNESS AND CONNECTOR(ECM−STARTER RELAY)
(a) Disconnect the E13 ECM connector.
(b) Remove the ST relay from the driver side R/B.
(c) Check the resistance between the wire harness side con-
nectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
STA (E13−17)−Driver side R/B (ST relay terminal1)Below1

Standard (Check for short):
Tester ConnectionSpecified Condition
STA (E13−17) or Driver side R/B (ST relay terminal1)−
Body ground10k
or higher
(d) Reconnect the ECM connector.
(e) Reconnect the ST relay.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ECM (See page10−65 of Pub. No. RM1018E AVENSIS)

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 ËšC (68 ËšF)
(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.

A79096
Driver Side J/B:
IGN Fuse
A66267
Ignition Switch Connector
Wire Harness Side:
IG2 I13
Front View
A66053A79064IG2 Relay
Engine Room R/B No. 4:
A66054A81706
IG2 Fuse
Engine Room R/B No.1:
2
1 05−246
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
NG REPLACE IG2 RELAY
OK
12 CHECK HARNESS AND CONNECTOR(IGNITION SWITCH−IG2 RELAY, IG2 FUSE
−IG2 RELAY)
(a) Check the harness and the connector between the igni-
tion switch and the IG2 relay.
(1) Inspect the IGN fuse.
SRemove the IGN fuse from the driver side J/B.
SCheck for continuity in the IGN fuse.
Standard: Continuity
SReinstall the IGN fuse.
(2) Disconnect the I13 ignition switch connector.
(3) Remove the IG2 relay from the engine room R/B
No. 4.
(4) Check the resistance between the wire harness
side connectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
IG2 (I13−6)−Engine room R/B No. 4 (IG2 relay terminal 1)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
IG2 (I13−6) or Engine room R/B No. 4 (IG2 relay terminal 1)
−Body ground10 k
or higher
(5) Reconnect the ignition switch connector.
(6) Reinstall the IG2 relay.
(b) Check the harness and the connector between the IG2
fuse and the IG2 relay.
(1) Remove the IG2 fuse from the engine room R/B No.
1.
(2) Remove the IG2 relay from the engine room R/B
No. 4.
(3) Check the resistance between the wire harness
side connectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Engine room R/B No. 1 (IG2 fuse terminal 2)−
Engine room R/B No. 4 (IG2 relay terminal 5)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
Engine room R/B No. 1 (IG2 fuse terminal 2) or
Engine room R/B No. 4 (IG2 relay terminal 5)−Body ground10 k
or higher
(4) Reinstall the IG2 fuse.
(5) 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

A83889
R21Radiator fun Relay Connector
Front View
Wire Harness Side:
A81695
E12
ECM Connector FPR
05−248
− DIAGNOSTICSSFI SYSTEM (2AZ−FSE)
AVENSIS Supplement (RM1045E)
14 CHECK HARNESS AND CONNECTOR(RADIATOR FAN RELAY−ECM)
(a) Check the harness and the connector between the radia-
tor fan relay and the ECM.
(1) Remove the R21 radiator fan relay.
(2) Disconnect the E12 ECM connector.
(3) Check the resistance between the wire harness
side connectors.
Standard (Check for open):
Tester ConnectionSpecified Condition
Radiator Fan relay (R21−3)−FPR (E12−7)Below 1

Standard (Check for short):
Tester ConnectionSpecified Condition
Radiator Fan relay (R21−3) or FPR (E12−7)−Body ground10 k
or higher
(4) Reinstall the radiator fan relay.
(5) Reconnect the ECM connector.
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ECM (See page10−65 of Pub. No. RM1018E AVENSIS)