Nissan Frontier. Manual — part 624
DIAGNOSIS AND REPAIR WORKFLOW
EC-1067
< BASIC INSPECTION >
[VQ40DE FOR MEXICO]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Worksheet Sample
LEC031A
EC-1068
< BASIC INSPECTION >
[VQ40DE FOR MEXICO]
INSPECTION AND ADJUSTMENT
INSPECTION AND ADJUSTMENT
Basic Inspection
INFOID:0000000009481713
1.
INSPECTION START
1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for
scheduled maintenance.
2. Open engine hood and check the following:
-
Harness connectors for improper connections
-
Wiring harness for improper connections, pinches and cut
-
Vacuum hoses for splits, kinks and improper connections
-
Hoses and ducts for leakage
-
Air cleaner clogging
-
Gasket
3. Check that electrical or mechanical loads are not applied.
-
Headlamp switch is OFF.
-
Air conditioner switch is OFF.
-
Rear window defogger switch is OFF.
-
Steering wheel is in the straight-ahead position, etc.
4. Start engine and warm it up until engine coolant temperature
indicator points to the middle of gauge.
Ensure engine stays below 1,000 rpm.
5. Run engine at about 2,000 rpm for about 2 minutes under no
load.
6. Check that no DTC is displayed with CONSULT or GST.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
2.
REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnostic Procedure.
>> GO TO 3.
3.
CHECK TARGET IDLE SPEED
With CONSULT
1. Run engine at about 2,000 rpm for about 2 minutes under no load.
SEF983U
SEF976U
SEF977U
INSPECTION AND ADJUSTMENT
EC-1069
< BASIC INSPECTION >
[VQ40DE FOR MEXICO]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2. Rev engine (2,000 to 3,000 rpm) two or three times under no
load, then run engine at idle speed for about 1 minute.
3. Read idle speed in “DATA MONITOR” mode with CONSULT.
EC-1072, "Idle Speed and Ignition Timing Check"
Without CONSULT
1. Run engine at about 2,000 rpm for about 2 minutes under no load.
2. Rev engine (2,000 to 3,000 rpm) two or three times under no load, then run engine at idle speed for about
1 minute.
EC-1072, "Idle Speed and Ignition Timing Check"
OK or NG
OK
>> GO TO 10.
NG
>> GO TO 4.
4.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform
EC-1074, "Accelerator Pedal Released Position Learning"
.
>> GO TO 5.
5.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform
EC-1075, "Throttle Valve Closed Position Learning"
>> GO TO 6.
6.
PERFORM IDLE AIR VOLUME LEARNING
EC-1075, "Idle Air Volume Learning"
.
Is Idle Air Volume Learning carried out successfully?
Yes or No
Yes
>> GO TO 7.
No
>> 1. Follow the instruction of Idle Air Volume Learning.
2. GO TO 4.
7.
CHECK TARGET IDLE SPEED AGAIN
With CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with CONSULT.
EC-1072, "Idle Speed and Ignition Timing Check"
Without CONSULT
1. Start engine and warm it up to normal operating temperature.
PBIA8513J
625
± 50 rpm (in P or N position)
625
± 50 rpm (in P or N position)
625
± 50 rpm (in P or N position)
EC-1070
< BASIC INSPECTION >
[VQ40DE FOR MEXICO]
INSPECTION AND ADJUSTMENT
2. Check idle speed.
EC-1072, "Idle Speed and Ignition Timing Check"
OK or NG
OK
>> GO TO 10.
NG
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
• Check camshaft position sensor (PHASE) and circuit. Refer to
EC-1201, "Diagnosis Procedure"
• Check crankshaft position sensor (POS) and circuit. Refer to
EC-1196, "Diagnosis Procedure"
.
OK or NG
OK
>> GO TO 9.
NG
>> 1. Repair or replace.
2. GO TO 4.
9.
CHECK ECM FUNCTION
1. Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident,
although this is rare.)
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
SEC-7, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"
.
>> GO TO 4.
10.
CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light.
EC-1072, "Idle Speed and Ignition Timing Check"
OK or NG
OK
>> GO TO 19.
NG
>> GO TO 11.
11.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform
EC-1074, "Accelerator Pedal Released Position Learning"
.
>> GO TO 12.
12.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform
EC-1075, "Throttle Valve Closed Position Learning"
>> GO TO 13.
13.
PERFORM IDLE AIR VOLUME LEARNING
EC-1075, "Idle Air Volume Learning"
.
Is Idle Air Volume Learning carried out successfully?
Yes or No
Yes
>> GO TO 14.
No
>> 1. Follow the instruction of Idle Air Volume Learning.
625
± 50 rpm (in P or N position)
15
± 5° BTDC (in P or N position)
BBIA0531E
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст