Lexus RX300 (MCU15). Manual — part 421
I06870
EFI Main
Relay
FI0VR–01
S04947
Continuity
Ohmmeter
Ohmmeter
No Continuity
1
2
3
5
S04946
Battery
Ohmmeter
Continuity
1
2
3
5
–
ELECTRONIC FUEL INJECTION
EFI MAIN RELAY
FI–55
LEXUS RX300 (RM785E)
EFI MAIN RELAY
INSPECTION
1.
REMOVE EFI MAIN RELAY (Marking: EFI)
2.
INSPECT EFI MAIN RELAY CONTINUITY
(a)
Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b)
Check that there is no continuity between terminals 3 and
5.
If there is continuity, replace the relay.
3.
INSPECT EFI MAIN RELAY OPERATION
(a)
Apply battery voltage across terminals 1 and 2.
(b)
Using an ohmmeter, check that there is continuity be-
tween terminals 3 and 5.
If there is no continuity, replace the relay.
4.
REINSTALL EFI MAIN RELAY
B09976
A/F Sensor
Heater
Relay
FI0VS–01
S04947
Continuity
Ohmmeter
Ohmmeter
No Continuity
1
2
3
5
S04946
Battery
Ohmmeter
Continuity
1
2
3
5
FI–56
–
ELECTRONIC FUEL INJECTION
A/F SENSOR HEATER RELAY
LEXUS RX300 (RM785E)
A/F SENSOR HEATER RELAY
INSPECTION
1.
REMOVE RELAY BOX COVER
2.
REMOVE A/F SENSOR HEATER RELAY (Marking: A/F
HTR)
3.
INSPECT A/F SENSOR HEATER RELAY CONTINUITY
(a)
Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b)
Check that there is no continuity between terminals 3 and
5.
If there is continuity, replace the relay.
4.
INSPECT A/F SENSOR HEATER RELAY OPERATION
(a)
Apply battery voltage across terminals 1 and 2.
(b)
Using an ohmmeter, check that there is continuity be-
tween terminals 3 and 5.
If there is no continuity, replace the relay.
5.
REINSTALL A/F SENSOR HEATER RELAY
6.
REINSTALL RELAY BOX COVER
I19409
Circuit Opening Relay
FI0VT–01
S04947
Continuity
Ohmmeter
Ohmmeter
No Continuity
1
2
3
5
S04946
Battery
Ohmmeter
Continuity
1
2
3
5
–
ELECTRONIC FUEL INJECTION
CIRCUIT OPENING RELAY
FI–57
LEXUS RX300 (RM785E)
CIRCUIT OPENING RELAY
INSPECTION
1.
REMOVE CIRCUIT OPENING RELAY (Marking: CIR
OPN)
Remove the circuit opening relay from R/B No.1.
2.
INSPECT CIRCUIT OPENING RELAY CONTINUITY
(a)
Using an ohmmeter, check that there is continuity be-
tween terminals 1 and 2.
If there is no continuity, replace the relay.
(b)
Check that there is no continuity between terminals 3 and
5.
If there is continuity, replace the relay.
3.
INSPECT CIRCUIT OPENING RELAY OPERATION
(a)
Apply battery voltage across terminals 1 and 2.
(b)
Using an ohmmeter, check that there is continuity be-
tween terminals 3 and 5.
If there is no continuity, replace the relay.
4.
REINSTALL CIRCUIT OPENING RELAY
FI0VU–01
B04805
V–Bank Cover
EVAP Hose
VSV for EVAP
VSV for EVAP Connector
VSV for ACIS NO.2
Connector
VSV for ACIS NO.1
Connector
VSV for ACIS NO.2
FI–58
–
ELECTRONIC FUEL INJECTION
VSV FOR EVAPORATIVE EMISSION (EVAP)
LEXUS RX300 (RM785E)
VSV FOR EVAPORATIVE EMISSION (EVAP)
COMPONENTS
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