Subaru XT 1988 Service Manual page 1321

WIRING DIAGRAM AND TROUBLESHOOTING
6-3
3) Temperature Gauge and Temperature Gauge Unit
Determine whether thermometer
No
indicates below "C" when igni·
tion switch is turned off.
Yes
Turn on ignition switch.
Determine whether fuel meter is
No
operat ing normally.
Yes
Remove connector from thermo
unit. Connect resistor (42 n) to
No
YG wire on
harness side and
ground to see if thermometer
points to 86°C (187°F).
Yes
Thermo unit is defective.
I
Replace thermo unit.
I
Temperature gauge (thermome·
• It remains in high position.
ter) and temperature gauge unit
~
Pointer will not operate.
(thermo unit) are defective. • It remains in low position.
~============================~ ~_'n_a_c_c_u_ra_t_e_i_nd
__ ic_a_ti_o_n_' __________
- J
I
Thermometer is defective.
I
·1
Replace thermometer.
I
Determine whether 12·volt
No
I I
voltage appears at terminal
Harness is defective.
on back of meter.
y
Yes
Repair.
I
No
Yes
I"
/
I
./
Replace fuse.
I
Check if fuse is blown.
Fuse blown.
"-
Check if 7V* appears at
No Check if 7V* appears at
f
#26 terminal (YG or Gl)
thermo unit YG lead.
'\",
of 21·P connector (brown).
Yes
Yes
No
Thermometer defective.
(
l
Thermometer is defective.
I
Replace thermometer.
Y
Replace.
I
I
Defective harness wiring.
I
I
- I
Re p air.
Note: *Mean value is 7V.
49