Infiniti I35 (A33). Manual — part 297
PROCEDURE A
=NHEC1326S01
1
CHECK COOLING FAN POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect cooling fan relay-1.
3. Turn ignition switch ON.
4. Check voltage between cooling fan relay-1 terminals 1, 3, 6 and ground with CONSULT-II or tester.
SEF590X
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 2.
2
DETECT MALFUNCTIONING PART
Check the following.
I
Joint connector-8
I
Joint connector-9
I
15A fuse
I
40A fusible links
I
Harness for open or short between cooling fan relay-1 and fuse
I
Harness for open or short between cooling fan relay-1 and battery
©
Repair open circuit or short to ground or short to power in harness or connectors.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1217 ENGINE OVER TEMPERATURE
Diagnostic Procedure (Cont’d)
EC-529
3
CHECK COOLING FAN MOTORS CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector.
SEC057D
3. Check harness continuity between cooling fan relay-1 terminal 5 and cooling fan motor-1 terminal 2, cooling fan
motor-1 terminal 3 and ground. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
5. Check harness continuity between cooling fan relay-1 terminal 7 and cooling fan motor-2 terminal 2, cooling fan
motor-2 terminal 3 and ground. Refer to Wiring Diagram.
Continuity should exist.
6. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 4.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
4
CHECK COOLING FAN OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 35 and cooling fan relay-1 terminal 2. Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 5.
5
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors E8, F17
I
Harness for open or short between cooling fan relay-1 and ECM
©
Repair open circuit or short to ground or short to power in harness or connectors.
DTC P1217 ENGINE OVER TEMPERATURE
Diagnostic Procedure (Cont’d)
EC-530
6
CHECK COOLING FAN RELAY-1
Check continuity between cooling fan relay-1 terminals 3 and 5, 6 and 7 under the following conditions.
SEF591X
OK or NG
OK
©
GO TO 7.
NG
©
Replace cooling fan relay.
7
CHECK COOLING FAN MOTORS-1 AND -2
Supply battery voltage between the following terminals and check operation.
SEF592X
OK or NG
OK
©
GO TO 8.
NG
©
Replace cooling fan motors.
8
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-152.
©
INSPECTION END
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1217 ENGINE OVER TEMPERATURE
Diagnostic Procedure (Cont’d)
EC-531
PROCEDURE B
NHEC1326S02
1
CHECK COOLING FAN POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect cooling fan relays-2 and -3.
3. Turn ignition switch ON.
4. Check voltage between cooling fan relays-2 and -3 terminals 1, 3 and ground with CONSULT-II or tester.
SEF593X
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 2.
2
DETECT MALFUNCTIONING PART
Check the following.
I
Joint connector-8
I
Joint connector-9
I
Harness for open or short between cooling fan relays-2 and -3 and joint connectors-8, -9
©
Repair harness or connectors.
3
CHECK COOLING FAN CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector.
3. Check harness continuity between cooling fan relay-2 terminal 5 and cooling fan motor-1 terminal 1, cooling fan relay-2
terminal 7 and cooling fan motor-1 terminal 4, cooling fan relay-2 terminal 6 and ground. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
5. Check harness continuity between cooling fan relay-3 terminal 5 and cooling fan motor-2 terminal 1, cooling fan relay-3
terminal 7 and cooling fan motor-2 terminal 4, cooling fan relay-3 terminal 6 and ground. Refer to Wiring Diagram.
Continuity should exist.
6. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 4.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
4
CHECK COOLING FAN OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 36 and cooling fan relay-2 terminal 2, cooling fan relay-3 terminal 2.
Refer to Wiring Diagram.
Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 5.
DTC P1217 ENGINE OVER TEMPERATURE
Diagnostic Procedure (Cont’d)
EC-532
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