Lexus SC300 / Lexus SC400. Service manual — part 660
WIRING DIAGRAM
TR–28
–
ENGINE TROUBLESHOOTING
Wiring Diagram
–
ENGINE TROUBLESHOOTING
Wiring Diagram
TR–29
TERMINALS OF ECU
Connectors of the engine & ECT ECU are water–proof and are the
bolt type.
For water proof type connectors, in order to measure the voltage
of ECU terminals and the resistance of connected parts, connect
the inspection sub wire harness between the ECU and vehicle
wire harness, then perform the inspection. The inspection method
of inserting a tester probe from the other side of connector notice-
ably reduces the water–proof ability.
Disconnect the connector by fully loosening the bolt.
PREPARATION
1.
Turn the ignition switch to LOCK position.
2.
Turn up the passenger side floor mat.
3.
Remove the ECU protector.
4.
Disconnect the connector from the ECU.
After completely loosening the bolt, the two parts of the con-
nector can be separated.
NOTICE:
•
Do not pully the wire harness when disconnecting the
connector.
•
When disconnecting the connector, the ECU’s backup
power source is cut off, so the malfunction codes, etc.
recorded in the ECU memory are cancelled.
•
Never insert a tester probe or male terminal used for
inspection purposes into the female terminal of the
vehicle wire harness. Otherwise, the female terminal may
be widened, which can result in faulty connection.
5.
Connect the Check Harness A between ECU and connector
of vehicle wire harness.
SST 09990–01000
HINT: The arrangement of the check connector terminals are
the same as those of the ECU.
See page
6.
Disconnect the Check Harness A.
7.
Reconnect the connector to the ECU.
(a) Match the male connector correctly with the female
connector, then press them together.
(b) Tighten the bolt
Make sure the connector is completely connected, by
tightening the bolt until there is a clearance of less than
1 mm (0.04 in.) between bottom of the male connector
and end of the female connector.
8.
Install the ECU protector and floor mat.
TR–30
–
ENGINE TROUBLESHOOTING
Terminals of ECU
TERMINALS OF ECU
–
ENGINE TROUBLESHOOTING
Terminals of ECU
TR–31
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст