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Acura RSX Honda Integra. Manual - part 406

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21-31

ECT Sensor Circuit Troubleshooting

CLIMATE CONTROL UNIT 30P CONNECTOR

RECIRCULATION CONTROL MOTOR 5P CONNECTOR

GRN/WHT

GRN/YEL

GRN/WHT

GRN/YEL

CLIMATE CONTROL UNIT 30P CONNECTOR

RED/WHT

10. Turn the ignition switch OFF.

11. Check for continuity between the following

terminals of the climate control unit 30P connector
and the recirculation control motor 5P connector.
30P:

5P:

No. 25

No. 2

No. 26

No. 1

Check for loose wires or poor connections at

the climate control unit 30P connector and at
recirculation control motor 5P connector. If the
connections are good, substitute a known-good
climate control unit, and recheck. If the symptom/
indication goes away, replace the original climate
control unit.

Repair any open in the wire(s) between the

climate control unit and the recirculation control
motor.

12. Remove the recirculation control motor (see page

21-47).

13. Check the recirculation control linkage and doors

for smooth movement.

Replace the recirculation control motor.

Repair the recirculation control linkage or

doors.

1. Check the malfunction indicator lamp (MIL).

Refer to the powertrain DTCs (see page 11-3).

Go to step 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 (II).

6. Measure the voltage between the No. 18 terminal

of the climate control unit 30P connector and body
ground.

Check for loose wires or poor connections at

the climate control unit 30P connector and at the
ECT sensor 2P connector. If the connections are
good, substitute a known-good climate control unit,
and recheck. If the symptom/indication goes away,
replace the original climate control unit.

Repair open in the wire between the climate

control unit and the ECT sensor.

Wire side of female terminals

Is ther e continuity?

Do the r ecir culation contr ol linkage and door s
move smoothly?

Does the malf unction indicator lamp come on?

Is ther e about 5 V ?

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21-32

Climate Control

Climate Control Power and Ground Circuit Troubleshooting

CLIMATE CONTROL UNIT 30P CONNECTOR

BLK/YEL

CLIMATE CONTROL UNIT 30P CONNECTOR

BLK

1. Check the No. 14 (10 A) fuse in the under-dash fuse/

relay box.

Go to step 2.

Replace the fuse, and recheck.

2. Disconnect the climate control unit 30P connector.

3. Turn the ignition switch ON (II).

4. Measure the voltage between the No. 15 terminal

of the climate control unit 30P connector and body
ground.

Go to step 5.

Repair open in the wire between the No. 14

fuse in the under-dash fuse/relay box and the
climate control unit.

5. Turn the ignition switch OFF.

6. Check for continuity between the No. 1 terminal of

the climate control unit 30P connector and body
ground.

Check for loose wires or poor connections at

the climate control unit 30P connector. If the
connections are good, substitute a known-good
climate control unit, and recheck. If the symptom/
indication goes away, replace the original climate
control unit.

Check for an open in the wire between the

climate control unit and body ground. If the wire is
OK, check for poor ground at G402.

Wire side of female terminals

Is the f use OK ?

Is ther e batter y voltage?

Is ther e continuity?

05/06/27 18:04:47 61S6M040_210_0033

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21-33

A/C Condenser Fan Circuit Troubleshooting

A/C CONDENSER FAN RELAY 4P SOCKET

BLU/YEL

JUMPER WIRE

A/C CONDENSER FAN RELAY 4P SOCKET

BLK/YEL

A/C CONDENSER FAN RELAY 4P SOCKET

NOTE:

• Do not use this troubleshooting procedure if the

radiator fan and/or the A/C compressor is inoperative.
Refer to the symptom troubleshooting index.

• Before performing symptom troubleshooting, check

for powertrain DTCs (see page 11-3).

1. Check the No. 1 (30 A) fuse in the under-hood

fuse/relay box, and the No. 14 (10 A) fuse in the
under-dash fuse/relay box.

Go to step 2.

Replace the fuse(s), and recheck.

2. Remove the A/C condenser fan relay from the

under-hood fuse/relay box, and test it (see page
22-62).

Go to step 3.

Replace the A/C condenser fan relay.

3. Measure the voltage between the No. 2 terminal of

the A/C condenser fan relay 4P socket and body
ground.

Go to step 4.

Replace the under-hood fuse/relay box.

4. Connect the No. 1 and No. 2 terminals of the A/C

condenser fan relay 4P socket with a jumper wire.

Go to step 5.

Go to step 8.

5. Disconnect the jumper wire.

6. Turn the ignition switch ON (II).

7. Measure the voltage between the No. 3 terminal of

the A/C condenser fan relay 4P socket and body
ground.

Replace the under-hood fuse/relay box.

Repair open in the BLK/YEL wire between the

No. 14 (10 A) fuse in the under-dash fuse/relay box
and the A/C condenser fan relay.

8. Disconnect the jumper wire.

(cont’d)

Ar e the f uses OK ?

Is the r elay OK ?

Is ther e batter y voltage?

Does the A/ C condenser f an r un?

Is ther e batter y voltage?

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21-34

Climate Control

A/C Condenser Fan Circuit Troubleshooting (cont’d)

A/C CONDENSER FAN RELAY 4P SOCKET

BLU/YEL

A/C CONDENSER FAN 2P CONNECTOR

BLU/YEL

A/C CONDENSER FAN 2P CONNECTOR

BLK

9. Disconnect the A/C condenser fan 2P connector.

10. Check for continuity between the No. 1 terminal of

the A/C condenser fan relay 4P socket and the No. 2
terminal of the A/C condenser fan 2P connector.

Go to step 11.

Repair open in the wire between the A/C

condenser fan relay and the A/C condenser fan.

11. Check for continuity between the No. 1 terminal of

the A/C condenser fan 2P connector and body
ground.

Replace the A/C condenser fan motor.

Check for an open in the wire between the A/C

condenser fan and body ground. If the wire is OK,
check for poor ground at G302.

Wire side of female terminals

Is ther e continuity?

05/06/27 18:04:49 61S6M040_210_0035

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