Nissan Pathfinder. Manual — part 513
EC-358
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P1148, P1168 CLOSED LOOP CONTROL
P1148, P1168 CLOSED LOOP CONTROL
DTC Logic
INFOID:0000000009178268
DTC DETECTION LOGIC
NOTE:
DTC P1148 or P1168 is displayed with another DTC for A/F sensor 1.
Perform the trouble diagnosis for the corresponding DTC.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1148
CLOSED LOOP-B1
(Closed loop bank 1)
The closed loop control function for bank
1 does not operate even when vehicle is
being driven in the specified condition.
• Harness or connectors
(The A/F sensor 1 circuit is open or shorted.)
• A/F sensor 1
• A/F sensor 1 heater
P1168
CLOSED LOOP-B2
(Closed loop bank 2)
The closed loop control function for bank
2 does not operate even when vehicle is
being driven in the specified condition.
P1212 TCS COMMUNICATION LINE
EC-359
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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P1212 TCS COMMUNICATION LINE
Description
INFOID:0000000009178269
This CAN communication line is used to control the smooth engine operation during the TCS operation. Pulse
signals are exchanged between ECM and “ABS actuator and electric unit (control unit)”.
Be sure to erase the malfunction information such as DTC not only for “ABS actuator and electric unit
(control unit)” but also for ECM after TCS related repair.
DTC Logic
INFOID:0000000009178270
DTC DETECTION LOGIC
NOTE:
• If DTC P1212 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
• If DTC P1212 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
.
Freeze frame data is not stored in the ECM for this self-diagnosis.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for at least 10 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009178271
Perform the trouble diagnosis for brake control system. Refer to
NOTE:
If DTC P1212 is displayed with DTC UXXXX and/or P0607, perform the following trouble diagnosis.
• Trouble diagnosis for DTC UXXXX Refer to
• Trouble diagnosis for DTC P0607 Refer to
.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1212
TCS C/U FUNCTN
(TCS control unit function)
ECM cannot receive the information
from “ABS actuator and electric unit
(control unit)” continuously.
• Harness or connectors
(The CAN communication line is open or shorted.)
• ABS actuator and electric unit (control unit)
• Dead (Weak) battery
EC-360
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P1217 ENGINE OVER TEMPERATURE
P1217 ENGINE OVER TEMPERATURE
DTC Logic
INFOID:0000000009178272
DTC DETECTION LOGIC
NOTE:
• If DTC P1217 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
• If DTC P1217 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will
rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is
indicated.
CAUTION:
When a malfunction is indicated, be sure to replace the coolant. Refer to
.
Also, replace the engine oil. Refer to
MA-27, "ENGINE OIL : Changing Engine Oil"
1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to
use coolant with the proper mixture ratio. Refer to
MA-16, "FOR USA AND CANADA : Engine Cool-
2. After refilling coolant, run engine to ensure that no water-flow noise is emitted.
DTC CONFIRMATION PROCEDURE
1.
PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to
EC-361, "Component Function Check"
NOTE:
Use component function check to check the overall function of the cooling fan. During this check, a DTC might
not be confirmed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Component Function Check
INFOID:0000000009178273
1.
PERFORM COMPONENT FUNCTION CHECK-I
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pres-
sure fluid escaping from the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1217
ENG OVER TEMP
[Engine over temperature
(Overheat)]
• Cooling fan does not operate properly (Over-
heat).
• Cooling fan system does not operate properly
(Overheat).
• Engine coolant was not added to the system
using the proper filling method.
• Engine coolant is not within the specified
range.
• Harness or connectors
(Cooling fan circuit is open or shorted.)
• IPDM E/R
• Cooling fan control module
• Cooling fan motor
• Radiator hose
• Radiator
• Radiator cap
• Reservoir tank
• Water pump
• Thermostat
• Water control valve
P1217 ENGINE OVER TEMPERATURE
EC-361
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
Is the coolant level in the reservoir tank and/or radiator below the
proper range?
YES
>> Proceed to
.
NO
>> GO TO 2.
2.
PERFORM COMPONENT FUNCTION CHECK-II
Confirm whether customer filled the coolant or not.
Did customer fill the coolant?
YES
>> Proceed to
.
NO
>> GO TO 3.
3.
PERFORM COMPONENT FUNCTION CHECK-III
With CONSULT
1. Turn ignition switch ON.
2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
3. Check that cooling fan speed varies according to the percentage.
Without CONSULT
1. Activate IPDM E/R auto active test and check cooling fan motors operation. Refer to
.
2. Check that cooling fan operates.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009178274
1.
CHECK COOLING FAN OPERATION
With CONSULT
1. Turn ignition switch ON.
2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
3. Check that cooling fan speed varies according to the percentage.
Without CONSULT
1. Activate IPDM E/R auto active test and check cooling fan motors operation. Refer to
.
2. Check that cooling fan operates.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Proceed to
.
2.
CHECK COOLING SYSTEM FOR LEAK-I
Check cooling system for leak. Refer to
.
Is leakage detected?
YES
>> GO TO 3.
NO
>> GO TO 4.
3.
CHECK COOLING SYSTEM FOR LEAK-II
Check the following for leak.
• Hose (Refer to
• Radiator (Refer to
.)
• Water pump (Refer to
.)
SEF621W
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