Nissan Primera P11. Manual - part 96

YEC805

BATTERY

IGNITION SWITCH

ON or START

FUSE
BLOCK
(J/B)

Refer to EL-POWER.

: Detectable line for DTC
: Non-detectable line for DTC

COOLING
FAN
RELAY-3

COOLING
FAN
RELAY-2

COOLING
FAN
RELAY-1

COOLING
FAN
MOTOR-1

LOW

HIGH

TRIPLE-
PRESSURE
SWITCH

COOLING
FAN
MOTOR-2

ECM

REFER TO THE FOLLOWING

FUSE BLOCK - Junction Box (J/B)

TROUBLE DIAGNOSIS 8

CD20T

Cooling Fan (Overheat) (Cont’d)

EC-89

DIAGNOSTIC PROCEDURE

INSPECTION START

CHECK COOLING FAN LOW
SPEED OPERATION.
1. Disconnect cooling fan relay-3.

2. Turn ignition switch to “ON”

position.

3. Perform “COOLING FAN”

in “ACTIVE TEST” mode
with CONSULT-II.

------------------------------------------------------------------------------------------------------------------------- OR -------------------------------------------------------------------------------------------------------------------------

2. Start engine.
3. Set temperature switch at

full cold position.

4. Turn Air Conditioner switch

to “ON” position.

5. Turn blower fan switch to

“ON” position.

6. Run engine at idle speed

for a few minutes with Air
Conditioner operating.

7. Make sure that both cool-

ing fans operate at low
speed.

OK

E

NG

Check cooling fan low
speed control circuit.
(Go to PROCEDURE A .)

CHECK COOLING FAN HIGH
SPEED OPERATION.
1. Turn ignition switch to “LOCK”

position.

2. Reconnect cooling fan relay-3.
3. Disconnect cooling fan relay-1.

4. Turn ignition switch to “ON”

position.

5. Perform “COOLING FAN”

in “ACTIVE TEST” mode
with CONSULT-II.

------------------------------------------------------------------------------------------------------------------------- OR -------------------------------------------------------------------------------------------------------------------------

4. Turn Air Conditioner switch

and blower fan switch to
“OFF” position.

5. Disconnect engine coolant

temperature sensor har-
ness connector.

6. Connect 150

Ω

resistor to

engine coolant temperature
sensor harness connector.

7. Restart engine and make

sure that both cooling fans
operate at higher speed
than low speed.

OK

E

NG

Check cooling fan high
speed control circuit.
(Go to PROCEDURE B .)

p

B

(Go to EC-CD-94.)

.

Cooling fan relay 2

Cooling fan relay-1

Cooling fan relay-3

YEC383

SEF111X

NEF809

Cooling fan

SEF111X

YEC384

Cooling fan

Engine coolant
temperature sensor
harness connector

resistor

H

H

H

TROUBLE DIAGNOSIS 8

CD20T

Cooling Fan (Overheat) (Cont’d)

EC-90

PROCEDURE A

INSPECTION START

CHECK POWER SUPPLY.
1. Turn ignition switch to “LOCK” posi-

tion.

2. Disconnect cooling fan relay-1 and

fan motor-1 connector.

3. Turn ignition switch to “ON” position.
4. Check voltage between cooling fan

motor-1 connector terminal

p

1

, fan

relay-1 connector terminal

p

1

and

ground.

Voltage: Battery voltage

OK

E

NG

Check the following:

●

10A fuse

●

40A, 100A, fusible
links

●

Harness for open or
short-circuit between
cooling fan motor-1
and battery.

●

Harness for open or
short-circuit between
cooling fan relay-1 and
fuse.

If NG, replace fuse or
fusible links or repair har-
ness or connectors.

CHECK GROUND CIRCUIT.
1. Turn ignition switch to “LOCK” posi-

tion.

2. Disconnect cooling fan relay-2 and

fan motor-2 harness connector.

3. Check harness continuity

between cooling fan relay-1 con-
nector terminal

p

5

and cooling

fan relay-2 connector terminal

p

4

; cooling fan motor-1 con-

nector terminal

p

2

and cooling

fan relay-2 connector terminal

p

3

.

Continuity should exist.

If OK, check harness for short-
circuit.

4. Check harness continuity

between cooling fan motor-2
connector terminal

p

1

and

cooling fan relay-1 connector
terminal

p

3

; cooling fan

motor-2 connector terminal

p

2

and ground.

Continuity should

exist.

If OK, check harness for short-
circuit.

OK

E

NG

Repair harness or con-
nectors.

p

C

YEC385

Cooling fan relay-1
connector

Cooling fan motor-1
connector

NEF416

.

Under the vehicle

A/C compressor

.

Cooling fan motor-1
harness connector

NEF417

.

Radiator
lower hose

.

Cooling fan
motor-2
harness
connector

.

Under the vehicle

YEC386

Cooling fan relay-2
connector

Cooling fan motor-1
connector

Cooling fan
relay-1 con-
nector

YEC387

Cooling fan
relay-1 connector

Cooling fan motor-2
connector

H

H

H

TROUBLE DIAGNOSIS 8

CD20T

Cooling Fan (Overheat) (Cont’d)

EC-91

p

C

CHECK OUTPUT SIGNAL CIRCUIT.
1. Disconnect ECM harness connector.

2. Check harness continuity between ECM

terminal

219

and cooling fan relay-1 con-

nector terminal

p

2

.

Continuity should exist.

If OK, check harness for short-circuit.

OK

E

NG

Check the following:

●

Harness connectors

E43

,

F2

●

Harness for open or short-
circuit between cooling fan
relay-1 and ECM

If NG, repair harness or con-
nectors.

CHECK COMPONENT
(Cooling fan relay-1, 2).
Refer to “COMPONENT INSPECTION”,
EC-CD-96.

OK

E

NG

Replace cooling fan relay.

CHECK COMPONENT
(Cooling fan motors).
Refer to “COMPONENT INSPECTION”,
EC-CD-96.

OK

E

NG

Replace cooling fan motors.

Disconnect and reconnect harness connec-
tors in the circuit. Then retest.

Trouble is not fixed.

Check ECM pin terminals for damage and
check the connection of ECM harness con-
nector. Reconnect ECM harness connector
and retest.

INSPECTION END

PROCEDURE B

INSPECTION START

CHECK POWER SUPPLY.
1. Turn ignition switch to “LOCK” position.
2. Disconnect cooling fan relay-2, 3 and

cooling fan motor-1.

3. Turn ignition switch to “ON” position.
4. Check voltage between cooling fan

motor-1 connector terminal

p

1

; cooling

fan relay-2 connector terminal

p

1

; cool-

ing fan relay-3 connector terminals

p

1

&

p

3

and ground.

Voltage: Battery voltage

OK

E

NG

Check the following:

●

10A-fuse

●

40A, 50A, 100A fusible
links

●

Harness for open or
short-circuit between fan
motor-1, fan relay-3 and
fusible link or fan relay-2,
3 and fuse.

If NG, replace fuse or fus-
ible link or repair harness or
connectors.

p

D

NEF207A

Cooling fan relay-1
connector

NEF203A

Cooling fan
relay-2
connector

Cooling fan
motor-1
connector

Cooling fan
relay-3
connector

H

H

H

H

H

H

H

H

TROUBLE DIAGNOSIS 8

CD20T

Cooling Fan (Overheat) (Cont’d)

EC-92