Infiniti G35 (V35). Manual — part 412
DTC P1217 ENGINE OVER TEMPERATURE
EC-529
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EC
Diagnostic Procedure
NBS000XG
1.
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
>> GO TO 2.
No
>> GO TO 4.
2.
CHECK COOLING FAN LOW SPEED OPERATION
With CONSULT-II
1.
Start engine and let it idle.
2.
Select “COOLING FAN” in “ACTIVE TEST” mode with CON-
SULT-II and touch “LOW” on the CONSULT-II screen.
3.
Make sure that cooling fans-1 and -2 operate at low speed.
OK or NG
OK
>> GO TO 3.
NG
>> Check cooling fan low speed control circuit. (Go to
3.
CHECK COOLING FAN HIGH SPEED OPERATION
With CONSULT-II
1.
Touch “HIGH” on the CONSULT-II screen.
2.
Make sure that cooling fans-1 and -2 operate at higher speed
than low speed.
OK or NG
OK
>> GO TO 6.
NG
>> Check cooling fan high speed control circuit. (Go to
4.
CHECK COOLING FAN LOW SPEED OPERATION
Without CONSULT-II
1.
Start engine and let it idle.
2.
Turn air conditioner switch ON.
3.
Turn blower fan switch ON.
4.
Make sure that cooling fans-1 and -2 operate at low speed.
OK or NG
OK
>> GO TO 5.
NG
>> Check cooling fan low speed control circuit. (Go to
SEF784Z
SEF785Z
SEC163BA
EC-530
DTC P1217 ENGINE OVER TEMPERATURE
5.
CHECK COOLING FAN HIGH SPEED OPERATION
Without CONSULT-II
1.
Turn ignition switch OFF.
2.
Turn air conditioner switch and blower fan switch OFF.
3.
Disconnect engine coolant temperature sensor harness connector.
4.
Connect 150
Ω
resistor to engine coolant temperature sensor harness connector.
5.
Restart engine and make sure that cooling fans-1 and -2 oper-
ate at higher speed than low speed.
OK or NG
OK
>> GO TO 6.
NG
>> Check cooling fan high speed control circuit. (Go to
6.
CHECK COOLING SYSTEM FOR LEAK
Refer to
.
OK or NG
OK
>> GO TO 7.
NG
>> Check the following for leak.
●
Hose
●
Radiator
●
Water pump
7.
CHECK RADIATOR CAP
Refer to
CO-15, "Checking Radiator Cap"
.
OK or NG
OK
>> GO TO 8.
NG
>> Replace radiator cap.
8.
CHECK THERMOSTAT
Refer to
CO-28, "WATER INLET AND THERMOSTAT ASSEMBLY"
.
OK or NG
OK
>> GO TO 9.
NG
>> Replace thermostat
9.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to
EC-231, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace engine coolant temperature sensor.
10.
CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to
EC-533, "Main 12 Causes of Overheating"
>> INSPECTION END
MEC475B
DTC P1217 ENGINE OVER TEMPERATURE
EC-531
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EC
PROCEDURE A
1.
CHECK POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connector E6.
3.
Check voltage between IPDM E/R terminals 15, 16 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.
●
40A fusible links
●
Harness for open or short between IPDM E/R and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
CHECK COOLING FAN MOTORS CIRCUIT
1.
Disconnect cooling fan motor-1 harness connector and cooling
fan motor-2 harness connector.
2.
Disconnect all IPDM E/R harness connectors.
3.
Check harness continuity between the following;
cooling fan motor-1 terminal 2 and IPDM E/R terminal 11,
cooling fan motor-1 terminal 3 and ground.
IPDM E/R terminal 38, 60 and ground.
Refer to wiring diagram.
4.
Also check harness for short to ground and short to power.
5.
Check harness continuity between the following;
cooling fan motor-2 terminal 2 and IPDM E/R terminal 10,
cooling fan motor-2 terminal 3 and ground.
Refer to wiring diagram.
6.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
Voltage: Battery voltage
PBIB1924E
Continuity should exist.
Continuity should exist.
PBIB1283E
EC-532
DTC P1217 ENGINE OVER TEMPERATURE
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness for open or short between cooling fan motors-1, 2 and IPDM E/R
●
Harness for open or short between cooling fan motors-1, 2 and ground
●
Harness for open or short between IPDM E/R and ground
>> Repair open circuit or short to ground or short to power in harness connectors.
5.
CHECK COOLING FAN MOTORS
Refer to
EC-534, "Component Inspection"
OK or NG
OK
>> GO TO 6.
NG
>> Replace malfunctioning cooling fan motors.
6.
CHECK INTERMITTENT INCIDENT
Perform
EC-151, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
OK or NG
OK
>> Replace IPDM E/R. Refer to
PG-16, "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MOD-
.
NG
>> Repair or replace harness or connector.
PROCEDURE B
1.
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.
3.
Disconnect IPDM E/R harness connectors E5, E6.
4.
Check harness continuity between the following;
cooling fan motor-1 terminal 1 and IPDM E/R terminal 8,
cooling fan motor-1 terminal 4 and IPDM E/R terminal 9,
IPDM E/R terminal 14, 38, 60 and ground.
Refer to wiring diagram.
5.
Also check harness for short to ground and short to power.
6.
Check harness continuity between the following;
cooling fan motor-2 terminal 1 and IPDM E/R terminal 13,
cooling fan motor-2 terminal 4 and IPDM E/R terminal 12.
Refer to wiring diagram.
7.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
Continuity should exist.
Continuity should exist.
PBIB1283E
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