DTC Description
DTC DETECTION LOGIC
DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition |
P0102 | MAF SEN/CIRCUIT-B1 (Mass or volume air flow ″A″ circuit low) | An excessively low voltage from the mass air flow sensor is sent to ECM. |
P0103 | MAF SEN/CIRCUIT-B1 (Mass or volume air flow ″A″ circuit high) | An excessively high voltage from the mass air flow sensor is sent to ECM. |
POSSIBLE CAUSE
DTC P0102
DTC P0103
FAIL-SAFE
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
Which DTC is detected? P0102 >> GO TO 2.
P0103 >> GO TO 3.
2.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0102
Is DTC detected? YES >> Proceed to EC-203, "Diagnosis Procedure".
NO >> INSPECTION END
3.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-1
Is DTC detected? YES >> Proceed to EC-203, "Diagnosis Procedure".
NO >> GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-2
Is DTC detected? YES >> Proceed to EC-203, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.INSPECTION START
Confirm the detected DTC.
Which DTC is detected? P0102 >> GO TO 2.
P0103 >> GO TO 3.
2.CHECK INTAKE SYSTEM
Check the following for connection.
Is the inspection result normal? YES >> GO TO 3.
NO >> Reconnect the parts. Refer to EM-24, "Exploded View".
3.CHECK MAF SENSOR POWER SUPPLY
Is the inspection result normal? YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Perform EC-484, "Diagnosis Procedure".
Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
5.CHECK MAF SENSOR GROUND CIRCUIT
Is the inspection result normal? YES >> GO TO 6.
NO >> Repair or replace error-detected parts.
6.CHECK MAF SENSOR INPUT SIGNAL CIRCUIT
Is the inspection result normal? YES >> GO TO 7.
NO >> Repair open circuit or short to ground or short to power in harness or connectors.
7.CHECK MAF SENSOR
Check the MAF sensor. Refer to EC-200, "Component Inspection".
Is the inspection result normal? YES >> GO TO 8.
NO >> Replace mass air flow sensor. Refer to EM-24, "Exploded View".
8.CHECK INTERMITTENT INCIDENT
Refer to GI-41, "Intermittent Incident".
>> INSPECTION END
Component Inspection
1.CHECK MASS AIR FLOW SENSOR-1
With CONSULT
Monitor item | Condition | Value |
MASS AIR FLOW SENSOR (Hz) | Ignition switch ON (Engine stopped.) | Approx. 3500 Hz |
Idle (Engine is warmed-up to normal operating temperature.) | 3500- 4100 Hz | |
2,500 rpm (Engine is warmed-up to normal operating temperature.) | 5000 - 5600 Hz | |
Idle to about 4,000 rpm | 3500 - 4100 Hz to Approx. 6300 Hz* |
*: Check for linear frequency rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal? YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK FOR THE CAUSE OF UNEVEN AIR FLOW THROUGH MASS AIR FLOW SENSOR
Is the inspection result normal? YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK MASS AIR FLOW SENSOR-2
With CONSULT
Monitor item | Condition | Value |
MASS AIR FLOW SENSOR (Hz) | Ignition switch ON (Engine stopped.) | Approx. 3500 Hz |
Idle (Engine is warmed-up to normal operating temperature.) | 3500- 4100 Hz | |
2,500 rpm (Engine is warmed-up to normal operating temperature.) | 5000 - 5600 Hz | |
Idle to about 4,000 rpm | 3500 - 4100 Hz to Approx. 6300 Hz* |
*: Check for linear frequency rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal? YES >> INSPECTION END
NO >> GO TO 4.
4.CHECK MASS AIR FLOW SENSOR-3
With CONSULT
Monitor item | Condition | Value |
MASS AIR FLOW SENSOR (Hz) | Ignition switch ON (Engine stopped.) | Approx. 3500 Hz |
Idle (Engine is warmed-up to normal operating temperature.) | 3500- 4100 Hz | |
2,500 rpm (Engine is warmed-up to normal operating temperature.) | 5000 - 5600 Hz | |
Idle to about 4,000 rp | 3500 - 4100 Hz to Approx. 6300 Hz* |
*: Check for linear frequency rise in response to engine being increased to about 4,000 rpm.
Is the inspection result normal? YES >> INSPECTION END
NO >> Clean or replace mass air flow sensor. Refer to EM-24, "Exploded View".
U1010 control unit (CAN)
DTC Logic
DTC DETECTION LOGIC
DTC
Display Item
Malfunction Detected Condition
Possible cause
U1010
CONTROL UNIT (CAN)
BCM detected internal CAN communication circuit malfunction.
BCM
Diagnosis Procedure
1.REPLACE BCM
When DTC “U1010” is detected, repla ...
Starting the engine (models without NISSAN
Intelligent Key® system)
Apply the parking brake.
Move the shift lever to P (Park) or N (Neutral).
P (Park) is recommended.
The shift lever cannot be moved out of
P (Park) and into any of the other gear
positions if the ignition key is turned to
the OFF position or if the key is removed
from the ignition ...
Symptom diagnosis
CHASSIS CONTROL
Active Engine Brake
NOTE:
For the operational conditions of Active Engine Brake, refer to
DAS-175, "System Description - Active
Engine Brake".
Perform the self-diagnosis with CONSULT before the symptom
diagnosis. Perform the trouble diagnosis if
...