Jeep 1987 Wrangler Workshop Manual page 1618

T R G
THROTTLE BODY FUEL INJECTION SYSTEM
# • % G
T R G
2.0L ENGINE
# • % G
Manifold Air/Fuel Temperature (MAT)
Sensor Test
Disconnect the wire h a r n e s s connector from the
M A T s e n s o r (A).
101726
T e s t the resistance of the sensor with an input
impedance (digital) volt-ohmmeter.
T h e resistance should be less than 1000 ohms
with the engine warm.
Refer to the resistance chart.
Manifold Air/Fuel Temperature Sensor
Temperature-to-Resistance Values
(Approximate)
° F
°c
Ohms
212 100
185
160
70 450
100 38
1,600
70 20 3,400
40
4 7,500
20
-7 13,500
0
-18 25,000
-40
-40 100,700
87061
R e p l a c e the sensor if it is not within the range of
resistance specified in the chart.
Test the resistance of the wire h a r n e s s between
the E C U wire h a r n e s s connector terminal D-3
and the sensor connector terminal, and terminal
C-8 to the s e n s o r connector terminal.
Repair the wire h a r n e s s a s n e c e s s a r y if the
resistance is greater than 1 ohm.
146