Nissan X-Trail 32. Instruction — part 1001
P1525 ASCD SYSTEM
EC-1133
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
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P1525 ASCD SYSTEM
DTC Description
INFOID:0000000010935832
DTC DETECTION LOGIC
NOTE:
DTC P1525 is displayed with another DTC.
Perform the trouble diagnosis for the corresponding DTC.
POSSIBLE CAUSE
• Harness or connectors
• Others systems
• ECM
FAIL-SAFE
Not applicable
Diagnosis Procedure
INFOID:0000000010935833
DTC P1525 is displayed with another DTC.
Perform trouble diagnosis for the corresponding DTC. Refer to
.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P1525
CONSISTENT MULTIPLEX SIGNALS FOR
CC/SL
(Consistent multiplex signals for cruise con-
trol/speed limiter)
• 1.DEF: THE DATA SUPPLIED TO THE
CRUISE CONTROL OR SPEED LIMIT-
ER ARE NOT CORRECT
Other DTC that illuminates MIL is detected while ASCD is operating.
EC-1134
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P1544 EGT SENSOR 2
P1544 EGT SENSOR 2
DTC Description
INFOID:0000000010935834
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors (Exhaust gas temperature sensor 2)
• Exhaust gas temperature sensor 2
• TC boost sensor
• A/F sensor
• Exhaust electric throttle control actuator
• Injector(s)
• Exhaust leakage
• Catalytic converter and DPF (Diesel Particulate Filter)
FAIL-SAFE
• EGR valve is closed position
• Throttle control motor is opened
• Prohibit DPF regeneration
DTC CONFIRMATION PROCEDURE
1.
CHECK DTC PRIORITY
If DTC P1544 is displayed with other DTC, first perform the trouble diagnosis for other DTC.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
.
NO
>> GO TO 2.
2.
PERFORM DIAGNOSIS PROCEDURE
NOTE:
DTC P1544 can not duplicate.
>> Proceed to
EC-1134, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000010935835
1.
CHECK DTC PRIORITY
If DTC P1544 is displayed with other DTC, first perform the trouble diagnosis for other DTC.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
.
NO
>> GO TO 2.
2.
CHECK EXHAUST LEAKAGE
Check exhaust leakage. Refer to
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts. And then GO TO 11.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P1544
TEMP SEN UPSTREAM OF PF
(Temperature sensor upstream of particle
filter)
• 1.DEF: SIGNAL OUTSIDE LOWER LIM-
IT
• 2.DEF: SIGNAL OUTSIDE UPPER LIMIT
• 3.DEF: OPERATION TEMPERATURE
TOO HIGH
• Diesel particulate filter temperature is more than 890
°
C (1,634
°
F).
• Diesel particulate filter temperature is extremely low.
P1544 EGT SENSOR 2
EC-1135
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
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3.
CHECK HARNESS CONNECTOR CONNECTIONS
Check harness connector connection of the following items.
• ECM
• Exhaust gas temperature sensor 2
• TC boost sensor
• A/F sensor
• Exhaust electric throttle control actuator
• Injectors
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts. And then GO TO 11.
4.
CHECK EXHAUST GAS TEMPERATURE (EGT) SENSOR 2 POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect EGT sensor 2 harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between EGT sensor 2 harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK EXHAUST GAS TEMPERATURE (EGT) SENSOR 2 POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between ECM harness connector and EGT sensor 2 harness connector.
4.
Also check harness for short to power and short to ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Repair or replace error-detected parts. And then GO TO 11.
6.
CHECK EXHAUST GAS TEMPERATURE (EGT) SENSOR 2 SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between ECM harness connector and EGT sensor 2 harness connector.
4.
Also check harness for short to power and short to ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace error-detected parts. And then GO TO 11.
+
−
Voltage
(Approx.)
EGT sensor 2
Connector
Terminal
F143
2
Ground
5 V
+
−
Continuity
ECM
EGT sensor 2
Connector
Terminal
Connector
Terminal
F118
105
F143
2
Existed
+
−
Continuity
ECM
EGT sensor 2
Connector
Terminal
Connector
Terminal
F118
109
F143
1
Existed
EC-1136
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P1544 EGT SENSOR 2
7.
CHECK EXHAUST GAS TEMPERATURE SENSOR 2
EC-1136, "Component Inspection (DPF Upstream Temperature Sensor)"
.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace error-detected parts. And then GO TO 11.
8.
CHECK TC BOOST SENSOR ROUTING CIRCUIT
EC-1001, "Diagnosis Procedure"
.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace error-detected parts. And then GO TO 11.
9.
CHECK AIR FUEL RATIO (A/F) SENSOR ROUTING CIRCUIT
EC-1184, "Diagnosis Procedure"
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Replace error-detected parts. And then GO TO 11.
10.
CHECK EXHAUST ELECTRIC THROTTLE CONTROL ACTUATOR ROUTING CIRCUIT
EC-1096, "Diagnosis Procedure"
.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Replace error-detected parts. And then GO TO 11.
11.
CHECK FUEL INJECTOR ROUTING CIRCUIT
EC-1019, "Diagnosis Procedure"
.
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Replace error-detected parts. And then GO TO 12.
12.
CHECK DIESEL PARTICULATE FILTER
EC-1173, "Component Inspection"
.
Is the inspection result normal?
YES-1 (Every inspection result are normal)>>Check intermittent incident. Refer to
.
YES-2 (After repairing any malfunctioning part)>>INSPECTION END
NO
>> Replace diesel particulate filter.
Component Inspection (DPF Upstream Temperature Sensor)
INFOID:0000000010935836
1.
CHECK EXHAUST GAS TEMPERATURE (EGT) SENSOR 2
1.
Disconnect EGT sensor 2 harness connector.
2.
Check resistance between EGT sensor 2 terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace EGT sensor 2.
EGT sensor 2
Condition
Resistance
+
-
Terminal
2
1
Temperature
°
C (
°
F)
20 (68)
89.309 – 159.795 k
Ω
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