Ect Sensor Circuit Troubleshooting - Acura 2002 RSX Service Manual

1 0 .
1 1 .
Turn the ignition switch OFF.
Check for continuity between the following
terminals of the climate control unit 30P connector
and the recirculation control motor 5P conneclor.
30P:
5P:
N o . 2 5
N o . 2
No. 26 No.
'l
CLIMATE CONTROL UNIT 3OP CONNECTOR
Wire side ol temale terminals
RECIRCULATION
CONTROL MOTOR 5P CONNEfiOR
Wire side o{ female terminals
ls thete continuity?
YES Check for loose wires or poor connectaons at
the climate control unit 30P connector and at
recirculation control motor 5P connector. lfthe
connections are good, substitute a known'good
climate control unit, and recheck. lf the symptom/
indication goes away, replace the original climate
control unit.l
NO Repair any open in the wire(s) between the
climate control unit and the recirculation control
motor.l
12. Remove the recirculation contol motor(see page
21-451.
13, Checkthe recirculation control linkage and doors
for smooth movement.
Do the recirculation control Iinkage and doors
move smoothly?
YES- ReDlace the recirculation control motor.l
NO- Repair the recirculation control linkage or
d o o r s . l
ECT Sensor Circuit Troubleshooting
1. Check the malfunction indicator lamp (MlL).
Does the malfunction indicator lamp come on?
YES Refer to the Fuel and Emissions section (see
p a g e 1 1 - 3 ) . 1
NO Go to slep 2.
2. Turn the ignition switch OFF.
3. Disconnect the ECT sensor 2P connector.
4. Disconnect the climate control unit 30P connector.
5. Turn the ignition switch oN (ll).
6. Measure the voltage between the No. 18 terminal
of the climate control unit 30P connector and body
g r o u n o .
CLIMATE CONTROL UNIT 3OP CONNECTOR
Wire side of female terminals
ls there about 5 V?
YES Check for loose wires or poor connections at
the climate control unit 30P connector and at the
ECT sensor 2P connector. lf the connections are
good, substitute a known-good climate control unit,
and recheck. lf the symptom/indication goes away,
replace the original climate control unit.l
NO - Repair open in the wire between the climate
control unit and the ECT sensor.I
21-31