Content .. 70 71 72 73 ..

Acura RSX Honda Integra. Manual - part 72

Ｓ６Ｍ６Ａ００Ａ１４４２６１０００００ＨＢＡＴ００

Symptom

Diagnostic procedure

Also check for

10-14

Fan Controls

Symptom Troubleshooting Index

•

Engine overheats

1.
2.
3.

4.
5.

7.
8.
9.

10.
11.
12.
13.
14.

Inspect the water pump (see page 10-5).
Check for a broken drive belt (see page 4-43).
Check the drive belt auto-tensioner (see page
4-44).
Check the thermostat (see page 10-4).
Check for the coolant leakage (from gaskets,
hoses, O-rings, etc.).
Check for dirt, leaves, or insects on radiator and
condenser.
Check for damaged or deformed fan shroud.
Check for plugged or deteriorated radiator hoses.
Check the radiator cap (see page 10-3).
Inspect the fan motors or fan relays.
Check for plugged heater core or hose(s).
Check the coolant level.
Check for deteriorated coolant.
Check for a damaged cylinder head gasket.

The radiator fan does not run at all

Radiator fan circuit troubleshooting (see page 10-16).

Cleanliness and
tightness of all
connectors

The radiator fan does not run for
engine cooling, but it runs with
the A/C on

Radiator fan switch circuit troubleshooting (Open)
(see page 10-18).

Cleanliness and
tightness of all
connectors

The radiator fan runs with the
ignition switch ON (II), the A/C off,
and the engine coolant
temperature below 199 °F (93 °C)

Radiator fan switch circuit troubleshooting (Short)
(see page 10-18).

Cleanliness and
tightness of all
connectors

The A/C condenser fan does not
run at all (but the radiator fan runs
with the A/C on)

A/C condenser fan circuit troubleshooting (see page
21-33).

HVAC DTCs
(see page 21-8)
Cleanliness and
tightness of all
connectors

Both the radiator fan and the A/C
condenser fan do not run with the
A/C on (but the A/C compressor
runs with the A/C on)

Radiator and A/C condenser fan common circuit
troubleshooting (see page 21-35).

HVAC DTCs
(see page 21-8)
Cleanliness and
tightness of all
connectors

The A/C compressor clutch does
not engage (but both the radiator
fan and the A/C condenser fan run
with the A/C on)

A/C compressor circuit troubleshooting (see page
21-36).

HVAC DTCs
(see page 21-8)
Cleanliness and
tightness of all
connectors

05/06/27 18:07:04 61S6M040_100_0014

＊０１

Ｓ６Ｍ６Ａ００Ａ１４４２６１０００００ＥＡＡＴ００

10-15

Circuit Diagram

G302

No. 20*1

BLU/YEL

BLK

ECM/PCM

BLK/RED

WHT

BAT

IG2

IGNITION SWITCH

No. 14 (10 A)

BLK/YEL

BLK

GRN/WHT

UNDER-HOOD FUSE/RELAY BOX

BATTERY

G302

No. 19 (100 A)

BLU/BLK

BLK

No. 4 (20 A)

No. 1 (30 A)

GRN/WHT

IG2 HOT in ACC (I),
ON (II) and START (III)

RADIATOR
FAN
RELAY

A/C
CONDENSER
FAN
RELAY

RADIATOR
FAN
MOTOR

RADIATOR
FAN SWITCH
(Closed: Above
199 °F (93 °C)

A/C
CONDENSER
FAN
MOTOR

UNDER-DASH
FUSE/RELAY BOX

GRN*2
GRN/WHT*3

FANC

*1 No. 20 (40 A): USA model

No. 20 (50 A): Canada model

*2 2002-2004 models
*3 2005-2006 models

05/06/27 18:07:05 61S6M040_100_0015

０１

０２

０３

Ｓ６Ｍ６Ａ００Ａ１４４２６１４９４１１ＦＡＡＴ００

−

YES

10-16

Fan Controls

Radiator Fan Circuit Troubleshooting

RADIATOR FAN RELAY 4P SOCKET

JUMPER
WIRE

RADIATOR FAN RELAY 4P SOCKET

1. Check the No. 4 (20 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 radiator fan relay from the under-hood

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

Go to step 3.

Replace the radiator fan relay.

3. Measure the voltage between radiator fan relay 4P

socket terminal No. 1 and body ground.

Go to step 4.

Replace the under-hood fuse/relay box.

4. Connect radiator fan relay 4P socket terminals

No. 1 and No. 2 with a jumper wire.

Go to step 5.

Go to step 6.

5. Disconnect the jumper wire, and turn the ignition

switch ON (II). Check for voltage between radiator
fan relay 4P socket terminal No. 3 and body ground.

Go to step 9.

Repair an open in the wire between the

under-hood fuse/relay box and under-dash
fuse/relay box.

Terminal side of female terminals

Ar e the f uses OK ?

Is the r elay OK ?

Is ther e batter y voltage?

Does the r adiator f an r un?

Is ther e batter y voltage?

05/06/27 18:07:05 61S6M040_100_0016

０４

０５

０２

０１

−

YES

10-17

RADIATOR FAN RELAY 4P SOCKET

BLU/BLK

RADIATOR FAN MOTOR 2P CONNECTOR

BLK

JUMPER
WIRE

RADIATOR FAN SWITCH
2P CONNECTOR

GRN/WHT

RADIATOR FAN SWITCH
2P CONNECTOR

6. Disconnect the radiator fan motor 2P connector.

7. Check for continuity between radiator fan relay 4P

socket terminal No. 2 and radiator fan motor 2P
connector terminal No. 2.

Go to step 8.

Repair an open in the wire between the

under-hood fuse/relay box and radiator fan motor
2P connector terminal No. 2.

8. Check for continuity between radiator fan motor 2P

connector terminal No. 1 and body ground.

Replace the radiator fan motor.

Repair an open in the wire between radiator

fan motor 2P connector terminal No. 1 and body
ground. If the wire is OK, check for a poor ground at
G302.

9. Turn the ignition switch OFF.

10. Reinstall the radiator fan relay.

11. Disconnect the radiator fan switch 2P connector.

12. Connect radiator fan switch 2P connector terminals

No. 1 and No. 2 with a jumper wire.

Replace the radiator fan switch.

Go to step 13.

13. Turn the ignition switch ON.

14. Remove the jumper wire, and measure the voltage

between radiator fan switch connector terminal
No. 2 and body ground.

Repair an open in the wire between radiator

fan switch 2P connector terminal No. 1 and body
ground. If the wire is OK, check for a poor ground at
G302.

Repair an open in the wire between radiator

fan switch terminal No. 2 and the under-hood
fuse/relay box.

Terminal side of
female terminals

Wire side of
female terminals

Wire side of female terminals

Wire side of
female terminals

Is ther e continuity?

Does the r adiator f an r un?

Is ther e batter y voltage?

05/06/27 18:07:06 61S6M040_100_0017

Content .. 70 71 72 73 ..