Nissan X-Trail 32. Manual — part 998
P1488 LOW PRESSURE EGR VOLUME CONTROL VALVE
EC-1121
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> Replace low pressure EGR volume control valve.
EC-1122
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P1489 LOW PRESSURE EGR VOLUME CONTROL VALVE UPSTREAM TEM-
PERATURE SENSOR
P1489 LOW PRESSURE EGR VOLUME CONTROL VALVE UPSTREAM
TEMPERATURE SENSOR
DTC Description
INFOID:0000000010935814
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors (Low pressure EGR volume control valve upstream temperature sensor circuit is
shorted.)
• Low pressure EGR volume control valve upstream temperature sensor
FAIL-SAFE
• EGR valve is closed position
• Throttle control motor is opened
• Temperature sensor after EGR cooler overheat signal diagnostic set of data to call the failure manag.
DTC CONFIRMATION PROCEDURE
1.
CHECK DTC PRIORITY
If DTC P1489 is displayed with DTC P1480, P1481, P1482, P1483, P1484, P1485, P1486, P1487 or P1488,
first perform the trouble diagnosis for DTC P1480, P1481, P1482, P1483, P1484, P1485, P1486, P1487 or
P1488.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
.
NO
>> GO TO 2.
2.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 1 minute before conducting the next test.
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON and wait at least 10 seconds.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
EC-1122, "Diagnosis Procedure"
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
.
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010935815
1.
CHECK DTC PRIORITY
If DTC P1489 is displayed with DTC P1480, P1481, P1482, P1483, P1484, P1485, P1486, P1487 or P1488,
first perform the trouble diagnosis for DTC P1480, P1481, P1482, P1483, P1484, P1485, P1486, P1487 or
P1488.
Is applicable DTC detected?
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P1489
LOW PRESSURE EGR VALVE TEMPERA-
TURE SENSOR
(Low pressure EGR valve temperature sen-
sor)
• 1.DEF: VOLTAGE TOO LOW
• 2.DEF: VOLTAGE TOO HIGH
• 3.DEF: OPERATION TEMPERATURE
TOO HIGH
• ECM detects a short circuit to battery.
• ECM detects a short circuit to ground.
• EGR cooler (low pressure) temperature is 180
°
C (356
°
F) or more.
P1489 LOW PRESSURE EGR VOLUME CONTROL VALVE UPSTREAM TEM-
PERATURE SENSOR
EC-1123
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
YES
>> Perform diagnosis of applicable. Refer to
.
NO
>> GO TO 2.
2.
CHECK ECM HARNESS CONNECTOR CONNECTIONS
Check ECM harness connector connection.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE HARNESS CONNECTOR CONNECTIONS
Check low pressure EGR volume control valve harness connector connection.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check low pressure EGR volume control valve circuit for open and short.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK DIESEL PARTICULATE FILTER
EC-1173, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace diesel particulate filter.
6.
CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE UPSTREAM TEMPERATURE SENSOR
EC-1123, "Component Inspection (Low Pressure EGR Temperature Sensor)"
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace error-detected parts.
Component Inspection (Low Pressure EGR Temperature Sensor)
INFOID:0000000010935816
1.
CHECK LOW PRESSURE EGR TEMPERATURE SENSOR
1.
Disconnect low pressure EGR volume control valve upstream temperature sensor harness connector.
2.
Check resistance between low pressure EGR temperature sensor terminals under the following condi-
tions.
+
-
Continuity
ECM
Low pressure EGR volume
control valve
Connector
Terminal
Connector
Terminal
F117
55
F155
1
Existed
65
2
69
3
F118
136
6
143
5
EC-1124
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P1489 LOW PRESSURE EGR VOLUME CONTROL VALVE UPSTREAM TEM-
PERATURE SENSOR
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace low pressure EGR temperature sensor.
Low pressure EGR temperature sen-
sor
Condition
Resistance
+
-
Terminal
2
1
Temperature
°
C (
°
F)
20 (68)
57.094 – 65.836 k
Ω
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