Maintenance Manual for J2 Sedan
Electronic Control System
of Engine
183
1) Dismantlement
①
Discharge coolant from radiator. Please refer to
"Change Engine Coolant".
②
Disconnect the wire harness connector of the
engine coolant temperature sensor.
③
Dismantle the engine coolant temperature sensor.
2) Installation
Be aware of following precaution to install with steps contrary to dismantlement.
■
Apply surface sealant on threaded part of sensor and tighten with specified torque. Tightening
torque :16-24N. M
■
Verify reliable installation of wire harness connector.
■
With engine idling
，
visually inspect coolant leakage.
III.
Throttle Position Sensor
1. Instruction of Parts
This sensor is one angle sensor with linear output characteristic and is composed of two arc sliding
contact resistors and two sliding contact arms. The hinges of the sliding contact arms are coaxial with
the throttle shaft. A 5V supply voltage US is applied onto two sides of the sliding resistors. At the
rotation of the throttle, the sliding contact arms rotate as well to move on the sliding contact resistors
and output the potential UP of the contact as voltage output. Therefore, it’s actually a rotation angle
potentiometer that outputs a voltage signal in proportional to the throttle position.
Fig. 4.3.005
