Nissan Sentra Service Manual: Fuel injector
Component Function Check
1.INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited? YES >> GO TO 2.
NO >> Proceed to EC-450, "Diagnosis Procedure".
2.CHECK FUEL INJECTOR FUNCTION
With CONSULT
- Start engine.
- Perform “POWER BALANCE” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
- Check that each circuit produces a momentary engine speed drop
Without CONSULT
- Let engine idle.
- Listen to each fuel injector operating sound.
Clicking noise should be heard.
Is the inspection result normal? YES >> INSPECTION END
NO >> Proceed to EC-450, "Diagnosis Procedure".
Diagnosis Procedure
1.CHECK FUSE
- Turn ignition switch OFF.
- Pull out #52 fuse and check that the fuse is not fusing.
Is the inspection result normal? YES >> GO TO 2.
NO >> Replace the fuse after repairing the applicable circuit.
2.CHECK FUEL INJECTOR POWER SUPPLY
- Insert the fuse which pulled out.
- Disconnect fuel injector harness connector.
- Turn ignition switch ON.
- Check the voltage between fuel injector harness connector and ground.
Is the inspection result normal? YES >> GO TO 4.
NO >> GO TO 3.
3.CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect IPDM E/R harness connector.
- Check the continuity between fuel injector harness connector and IPDM E/R harness connector
- Also check harness for short to ground.
Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".
NO >> Repair or replace error-detected parts.
4.CHECK FUEL INJECTOR CONTROL CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between fuel injector harness connector and ECM harness connector.
- Also check harness for short to ground and to power.
Is the inspection result normal? YES >> GO TO 5.
NO >> Repair or replace error-detected parts
5.CHECK FUEL INJECTOR
Check the fuel injector. Refer to EC-451, "Component Inspection (Fuel Injector)".
Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident" NO >> Replace malfunctioning fuel injector. Refer to EM-40, "Removal and Installation".
Component Inspection (Fuel Injector)
1.CHECK FUEL INJECTOR
- Turn ignition switch OFF.
- Disconnect fuel injector harness connector.
- Check resistance between fuel injector terminals as per the following.
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace malfunctioning fuel injector. Refer to EM-40, "Removal and Installation"
ASCD Indicator
Component Function Check
1.CHECK ASCD INDICATOR FUNCTION
Check ASCD indicator under the following conditions.
ASCD INDICATOR
CONDITION
SPECIFICATION
CRUISE LAMP
Ig ...
Fuel pump
Component Function Check
1.CHECK FUEL PUMP FUNCTION
Turn ignition switch ON.
Pinch fuel feed hose with
two fingers.
Fuel pressure pulsation should be felt on the fuel feed
hose for ...
Other materials:
P1553 Battery current sensor
DTC Logic
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1553
BAT CURRENT SENSOR
(Battery current sensor)
The signal voltage transmitted from the
sensor to ECM is higher than the amount
...
Door switch
With intelligent key
WITH INTELLIGENT KEY : Component Function Check
1.Check function
Select DOOR LOCK of BCM using CONSULT.
Select DOOR SW-DR, DOOR SW-AS, DOOR SW-RL and DOOR SW-RR in DATA MONITOR
mode.
Check that the function operates normally according to the following
conditions ...
Dtc/circuit diagnosis
Sport mode switch
Component function check
1. Check sport mode switch operation
Turn ignition switch on.
Check sport mode indicator lamp turns on/off on combination meter when
turn sport mode switch
on/off.
Is the inspection result normal?
Yes >> inspection end.
No >> ...
