Nissan Altima L32. Instruction — part 335
ELECTRICAL LOAD SIGNAL
EC-461
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
ELECTRICAL LOAD SIGNAL
Description
INFOID:0000000004349521
The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred
through the CAN communication line.
Component Function Check
INFOID:0000000004349522
1.
CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION
1. Turn ignition switch ON.
2. Connect CONSULT-III and select “DATA MONITOR” mode.
3. Select “LOAD SIGNAL” and check indication under the following conditions.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Go to
2.
CHECK LIGHTING SWITCH FUNCTION
Check “LOAD SIGNAL” indication under the following conditions.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Go to
3.
CHECK HEATER FAN CONTROL SWITCH FUNCTION
Select “HEATER FAN SW” and check indication under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000004349523
1.
INSPECTION START
Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to
Which circuit is related to the incident?
Rear window defogger>>GO TO 2.
Headlamp>>GO TO 3.
Heater fan>>GO TO 4.
2.
CHECK REAR WINDOW DEFOGGER SYSTEM
Monitor item
Condition
Indication
LOAD SIGNAL Rear window defogger switch
ON
ON
OFF
OFF
Monitor item
Condition
Indication
LOAD SIGNAL Lighting switch
ON at 2nd position
ON
OFF
OFF
Monitor item
Condition
Indication
HEATER FAN SW
Heater fan control switch
ON
ON
OFF
OFF
EC-462
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
ELECTRICAL LOAD SIGNAL
>> INSPECTION END
3.
CHECK HEADLAMP SYSTEM
(XENON TYPE) or
(HALOGEN TYPE).
>> INSPECTION END
4.
CHECK HEATER FAN CONTROL SYSTEM
Refer to
(automatic air conditioner) or
HAC-127, "Diagnosis Procedure"
(instruction air conditioner).
>> INSPECTION END
FUEL INJECTOR
EC-463
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
FUEL INJECTOR
Description
INFOID:0000000004349524
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.
Component Function Check
INFOID:0000000004349525
1.
INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
YES
>> GO TO 2.
NO
>> Go to
2.
CHECK FUEL INJECTOR FUNCTION
With CONSULT-III
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III.
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-III
1. Let engine idle.
2. Listen to each fuel injector operating sound.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000004349526
1.
CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuel injector harness connector.
3. Turn ignition switch ON.
SEF375Z
Clicking noise should be heard.
PBIB1986E
EC-464
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
FUEL INJECTOR
4. Check the voltage between fuel injector harness connector and
ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
• IPDM E/R harness connector F10
• 10A fuse (No. 35)
• Harness for open or short between fuel injector and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between fuel injector harness connector and ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK FUEL INJECTOR
EC-464, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace malfunctioning fuel injector.
5.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
Is the inspection result normal?
YES
>> Replace IPDM E/R.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
Component Inspection
INFOID:0000000004349527
1.
CHECK FUEL INJECTOR
1. Turn ignition switch OFF.
Fuel injector
Ground
Voltage
Cylinder Connector Terminal
1
F17
1
Ground Battery voltage
2
F18
1
3
F19
1
4
F20
1
JMBIA1636ZZ
Fuel injector
ECM
Continuity
Cylinder Connector Terminal Connector Terminal
1
F17
2
F14
32
Existed
2
F18
2
31
3
F19
2
30
4
F20
2
29
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст