Infiniti Q45. Manual — part 472
DTC P1217 ENGINE OVER TEMPERATURE
EC-527
C
D
E
F
G
H
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M
A
EC
6.
CHECK COOLING FAN MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between cooling fan relay-2 terminal 1 and ECM terminal 97.
Refer to Wiring Diagram.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E34, F34
●
Harness for open or short between cooling fan relay-2 and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
8.
CHECK COOLING FAN RELAY-2
Refer to
EC-532, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Replace cooling fan relay.
9.
CHECK COOLING FAN MOTORS-1 AND -2
Refer to
EC-532, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace cooling fan motors.
10.
CHECK INTERMITTENT INCIDENT
Refer to
EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Continuity should exist.
EC-528
DTC P1217 ENGINE OVER TEMPERATURE
PROCEDURE B
1.
CHECK COOLING FAN MOTOR 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, 5 and
ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
●
10A fuse
●
40A fusible link
●
Fuse, fusible link and relay block (J/B) connector E3
●
Harness for open or short between cooling fan relay-1 and fuse
●
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.
3.
CHECK COOLING FAN MOTOR CONTROL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect cooling fan motors-1 and -2 harness connector.
3.
Check harness continuity between the following terminals.
cooling fan motor-2 terminal 3 and cooling fan relay-1 terminal 6,
cooling fan relay-1 terminal 7 and ground,
cooling fan relay-1 terminal 3 and cooling fan motor-1 terminal 1.
Refer to Wiring Diagram.
4.
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.
PBIB2427E
Voltage: Battery voltage
PBIB0887E
Continuity should exist.
PBIB2426E
DTC P1217 ENGINE OVER TEMPERATURE
EC-529
C
D
E
F
G
H
I
J
K
L
M
A
EC
4.
CHECK COOLING FAN MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between cooling fan relay-1 terminal 2 and ECM terminal 28.
Refer to Wiring Diagram.
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.
●
Harness connectors E34, F34
●
Harness for open or short between cooling fan relay-2 and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK COOLING FAN RELAY-1
Refer to
EC-532, "Component Inspection"
OK or NG
OK
>> GO TO 7.
NG
>> Replace cooling fan relay.
7.
CHECK COOLING FAN MOTORS-1 AND -2
Refer to
EC-532, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace cooling fan motors.
8.
CHECK INTERMITTENT INCIDENT
Refer to
EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Continuity should exist.
EC-530
DTC P1217 ENGINE OVER TEMPERATURE
PROCEDURE C
1.
CHECK COOLING FAN MOTOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect cooling fan relay-3.
3.
Turn ignition switch ON.
4.
Check voltage between cooling fan relay-3 terminal 2 and
ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
●
10A fuse
●
Fuse, fusible link and relay block (J/B) connector E3
●
Harness for open or short between cooling fan relay-1 and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
CHECK COOLING FAN MOTOR CONTROL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect cooling fan motor-2 harness connector.
3.
Check harness continuity between the following terminals.
cooling fan motor-2 terminal 4 and cooling fan relay-3 terminal 3,
cooling fan relay-3 terminal 5 and ground.
Refer to Wiring Diagram.
4.
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.
PBIB2428E
Voltage: Battery voltage
PBIB2450E
Continuity should exist.
PBIB2426E
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