Page 369 of 5135
A54386
Wire Harness SideC2
Camshaft Timing Oil Control Valve
Connector
A65743ECM Connector
E13
OC1+OC1±
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±173
AVENSIS REPAIR MANUAL (RM1018E)
3CHECK HARNESS AND CONNECTOR(ECM ± OCV)
(a)Disconnect the camshaft timing oil control valve connec-
tor.
(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
Oil control valve (C2±1) ± OC1+ (E13±15)ContinuityOil control valve (C2±2) ± OC1± (E13±14)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
Oil control valve (C2±1) or OC1+ (E13±15) ± Body groundNocontinuityOil control valve (C2±2) or OC1± (E13±14) ± Body groundNo continuity
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK FOR INTERMITTENT PROBLEMS(See page 05±149)
Page 370 of 5135
A76888
FL MAIN
StarterCircuit
Opening Relay
Start Position SWEFI Relay
AM2
BatteryECM
STA MREL Ignition SWFuel Pump
ST2
ST
Relay
(NE Signal) (A/T)FC
EFISTTr
(M/T)
(A/T) AM2 05±264
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
FUEL PUMP CONTROL CIRCUIT
CIRCUIT DESCRIPTION
In the diagram below, when the engine is cranked, current flows from terminal ST2 of the ignition switch to
the starter relay coil and also current flows to terminal STA of the ECM (STA signal).
When the STA signal and NE signal are input to the ECM, Tr is turned ON, current flows to the coil of the
E.F.I. circuit opening relay, the relay switches on, power is supplied to the fuel pump and the fuel pump oper-
ates.
While the NE signal is generated (engine running), the ECM keeps Tr ON (circuit opening relay ON) and the
fuel pump also keeps operating.
05C79±01
Page 371 of 5135
A76889
FCECM
IB1 Engine Room
R/B No. 1
Engine Room
J/B No. 1
B±G
FL MAIN
BatteryGR
ECW±B 1AE9 10
32 51
1
3 5
4B 1EFI
EFI
Relay
B±G
F25
Fuel
Pump 4
5
W±B 10 Engine
Room
J/B No. 4 1
24 4
4
4 4A 1C8
Circuit
Opening
Relay B±Y
1
2
1
Engine Room
R/B No. 4
BR B±WB±WB±WB±W
L±BG±Y G±Y GR
B±YGR
MREL E98
IE12
6
IC3
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
05±265
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM
Page 372 of 5135
B16200
C8
A18294
FC (+)E1 (±)
ECM Connector
E12E9
05±266
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
When using hand±held tester:
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 / SPD\
º.
(c)Perform the active test with the engine stopped.
Result: The circuit opening relay operates.
OKPROCEED TO NEXT CIRCUIT INSPECTIONSHOWN ON PROBLEM SYMPTOMS TABLE
NG
2CHECK ECM POWER SOURCE CIRCUIT (See page 05±257)
NG REPAIR OR REPLACE POWER SOURCE CIRCUIT
OK
3 INSPECT 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)
NG REPLACE CIRCUIT OPENING RELAY
OK
4 INSPECT ECM(CHECK VOLTAGE)
(a) Turn the ignition switch ON.
(b) Measure the voltage between the terminals of the E9 and E12 ECM connector.
Standard:
Symbols (Terminal No.)Specified condition
FC (E9±10) ± E1 (E12±7)8 to 14 V
OK Go to step 6
NG
Page 373 of 5135
A66053
Engine Room R/B No.4EFI Relay
123
5
A79099
Wire Harness Side
C8
Circuit Opening Relay Connector
A65748
E9
MRELFC
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
05±267
AVENSIS REPAIR MANUAL (RM1018E)
5CHECK HARNESS AND CONNECTOR(EFI RELAY ± CIRCUIT OPENING RELAY,
CIRCUIT OPENING RELAY ± ECM)
(a)Remove the EFI 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
EFI relay (3) ± Circuit opening relay (C8±1)
Circuit opening relay (C8±2) ± FC (E9±10)Continuity
EFI relay (1) ± MREL (E9±8)
y
Standard (Check for short):
Symbols (Terminal No.)Specified condition
EFI relay (3) or Circuit opening relay (C8±1) ± Body ground
Circuit opening relay (C8±2) or FC (E9±10) ± Body groundNo continuity
EFI relay (1) or MREL (E9±8) ± Body ground
y
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)
6INSPECT FUEL PUMP ASSY (See page 11±22)
NG REPAIR OR REPLACE FUEL PUMP ASSY
OK
Page 374 of 5135
123
5
A79099
Wire Harness Side
C8
Circuit Opening Relay Connector
A66276
Fuel Pump Connector
Wire Harness Side
F25
05±268
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
7CHECK HARNESS AND CONNECTOR(CIRCUIT OPENING RELAY ± FUEL PUMP, FUEL PUMP ± BODY GROUND)
(a)Remove the circuit opening relay.
(b)Disconnect the 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)
When not using hand±held tester:
1CHECK OPERATION OF FUEL PUMP (See page 11±19)
OKPROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
NG
2CHECK ECM POWER SOURCE CIRCUIT (See page 05±257)
NG CHECK FOR ECM POWER SOURCE CIRCUIT
OK
Page 375 of 5135
B16200
C8
A18294
FC (+)E1 (±)
ECM Connector
E12E9
± DIAGNOSTICSSFI SYSTEM (1AZ±FE)
05±269
AVENSIS REPAIR MANUAL (RM1018E)
3 INSPECT 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)
NG REPLACE CIRCUIT OPENING RELAY
OK
4 INSPECT ECM(CHECK VOLTAGE)
(a) Turn the ignition switch ON.
(b) Measure the voltage between the terminals of the E9 and
E12 ECM connector.
Standard:
Symbols (Terminal No.)Specified condition
FC (E9±10) ± E1 (E12±7)8 to 14 V
OK Go to step 6
NG
Page 376 of 5135
A66053
Engine Room R/B No.4EFI Relay
123
5
A79099
Wire Harness Side
C8
Circuit Opening Relay Connector
A65748
E9
MRELFC
05±270
±
DIAGNOSTICS SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
5CHECK HARNESS AND CONNECTOR(EFI RELAY ± CIRCUIT OPENING RELAY, CIRCUIT OPENING RELAY ± ECM)
(a)Remove the EFI 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
EFI relay (3) ± Circuit opening relay (C8±1)
Circuit opening relay (C8±2) ± FC (E9±10)Continuity
EFI relay (1) ± MREL (E9±8)
y
Standard (Check for short):
Symbols (Terminal No.)Specified condition
EFI relay (3) or Circuit opening relay (C8±1) ± Body ground
Circuit opening relay (C8±2) or FC (E9±10) ± Body groundNo continuity
EFI relay (1) or MREL (E9±8) ± Body ground
y
NGREPAIR OR REPLACE HARNESS OR CONNECTOR
OK
CHECK AND REPLACE ECM (See page 01±32)
6INSPECT FUEL PUMP ASSY (See page 11±22)
NG REPAIR OR REPLACE FUEL PUMP ASSY
OK