Coolant Temperature (Tw) Sensor - Honda 1986 GoldWing GL1200A Manual

DIGITAL CIRCUIT
TESTER
~
TEMPERATURE SENSOR
If
resistance is outside the above ranges, replace the T1
sensor
NOTE: If the unit or thermometer touches the pan, false
readings will result.
Resistance:
2-3 K ohms Itt 20° C (68
0
F)
0.2-0.4 K ohms at 80 0 C (176 0
F)
CFI System
Air Temperature (T1) Sensor
(cont'd) - - - - - - - - - - - - - - - -
Sensor Inspection
Suspend the sensor in cold water. Heat the water slowly.
Measure resistance between the terminals.
Removal/Installation
Open the top compartment.
Remove the fuse/relay box from the holder.
Disconnect the coupler from the sensor.
Remove the sensor from the air cleaner cover by remov-
ing the nut.
Install the sensor and fuse/relay box in the reverse order
of removal.
T1 SENSOR
Coolant Temperature (TW) S e n s o r - - - - - - - - - - - - - - -
Disconnect the sensor (waterproof 2P blue) coupler
Connect the Inspection adapter to the hamess side
coupler. Turn the Ignition ON. There should be
4 75-5.25 V across the red
(+)
and green
1-)
adapter
leads.
If there is no voltage. check the wIring harness. Check
for no continuity between the red lead and the No 28
ECU terminal, and between the green lead and the NO.3
terminal. Continuity indicates an open circuit.
With the sensor coupler disconnected. check for no con-
tinuity between the No. 28 ECU terminal and each of the
other terminals and body ground. Continuity indicates a
short circuit
TW SENSOR WIRE (WIRE HARNESS SIDE)
If the above test results indicate no problem, measure
resistance between the terminals on the sensor side.
Resistance should range between 1 and 3 K ohms with
the engine cold. If resistance indicates no continuity,
check the sensor sub-harness for an open or short cir-
cuit. and the sensor coupler for poor contact at the ter-
minals.
ECU COUPLER
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10-30