Dtctroubleshooting - Acura 2002 RSX Service Manual

Climate Control
DTC Troubleshooting
DTC 1: An Open in the ln-car Temperature
Sensor Circuit
1. Remove the in-car temperature sensor (see page
2 1 , 3 9 ) .
2, Measure the resistance between the No. l and
No. 2 terminals of the in-car temperature sensor.
"Check for a change in resistance by heating or
cooling the sensor with a hair drier.
IN-CAR TEMPERATURE SENSOR
1 2
1 1
1 0
o
8
REstsrANcE 7
k o
6
4
1
11 32 50 68 86
- 1 0
0 1 0 2 0 3 0
TEMPERATURE
1 0 4 ' F
40 "c
3 .
.ls the tesistance within the specilications shown
on the gtaph?
YES - Go to step 3.
NO Replace the in-car temperature sensor.I
Disconnect the climate control unit 30P connector.
21-16
5 .
4. Check for continuity between the No. 8 terminal of
the climate control unit 30P connector and the
N o . 1 t e r m i n a l o f t h e i n - c a r t e m p e r a t u r e s e n s o r 2 P
connector.
CLIMATE CONTROL UNIT 3OP CONNECTOR
W i r e s i d e o f f e m a l e t e r m i n a l s
IN.CAR TEMPERATURE SENSOR 2P CONNECTOR
Wire side of female terminals
ls there continuity?
YES Go to step 5.
NO Repair open in the wire between the climate
control unit and the in-car temperature sensor.l
Check for continuity between the No. 2 terminal of
the climate control unit 30P connector and the
N o . 2 t e r m i n a l o f t h e i n - c a r t e m p e r a t u r e s e n s o r 2 P
connector.
CLIMATE CONTROL UNIT 3OP CONNECTOB
W i r e s i d e o f f e m a l e t e r m i n a l s
IN.CAR TEMPERATURE
SENSOR 2P CONNECTOR
Wire side of female terminals
ls there continuity?
YES Check for loose wires or poor connections at
the climate control unit 30P connector and at the in-
car temperature sensor 2P conneclor. lf the
connections are good, substitute a known-good
climate control unit, and recheck. lf the symptom/
i n d i c a t i o n g o e s a w a y , r e p l a c e t h e o r i g i n a l c l i m a t e
c o n t r o l u n i t . I
NO Repair open in the wire betvveen the climate
c o n t r o l u n i t a n d t h e i n - c a r t e m p e r a t u r e s e n s o r , l