Nissan Altima L32. Manual - part 334
COOLING FAN
EC-457
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
• 10 A fuse (No. 33)
• 40 A fusible link (letter K)
• IPDM E/R harness connector E18
• Harness for open or short between cooling fan relay-2 and battery
• Harness for open or short between cooling fan relay-3 and battery
• Harness for open or short between cooling fan relay-2 and IPDM E/R
• Harness for open or short between cooling fan relay-3 and IPDM E/R
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK COOLING FAN RELAY OUTPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connectors.
3. Check the continuity between cooling fan relay-2, -3 harness connectors and IPDM E/R harness connec-
tor.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness for open or short between cooling fan relay-2 and IPDM E/R
• Harness for open or short between cooling fan relay-3 and IPDM E/R
>> Repair open circuit, short to ground or short to power in harness or connectors.
5.
CHECK COOLING FAN MOTOR POWER SUPPLY CIRCUIT
1. Disconnect cooling fan motor-1 harness connector.
2. Check the voltage between cooling fan motor-1 harness con-
nector and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
• 40 A fusible link (letter M)
• Harness connector E12, E203
Cooling fan relay
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
E42
(cooling fan relay-2)
1
E17
42
Existed
E43
(cooling fan relay-3)
1
E18
34
Cooling fan motor-1
Ground
Voltage
Connector
Terminal
E220
1
Ground
Battery voltage
2
PBIB1670E