Nissan Frontier. Manual — part 387
INSPECTION AND ADJUSTMENT
EC-119
< BASIC INSPECTION >
[QR25DE]
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Without CONSULT
1. Start engine and warm it up to normal operating temperature.
EC-121, "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-262, "Component Description"
.
• Check crankshaft position sensor (POS) and circuit. Refer to
EC-258, "Component Description"
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
EC-121, "Procedure After Replacing ECM"
.
>> GO TO 4.
10.
CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light. Refer to
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-123, "Accelerator Pedal Released Position Learning"
.
>> GO TO 12.
12.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform
EC-123, "Throttle Valve Closed Position Learning"
.
>> GO TO 13.
13.
PERFORM IDLE AIR VOLUME LEARNING
EC-124, "Idle Air Volume Learning"
M/T: 625
± 50 rpm (in Neutral position)
A/T: 700
± 50 rpm (in P or N position)
M/T: 625
± 50 rpm (in Neutral position)
A/T: 700
± 50 rpm (in P or N position)
M/T: 15
± 5° BTDC (in Neutral position)
A/T: 15
± 5° BTDC (in P or N position)
BBIA0633E
EC-120
< BASIC INSPECTION >
[QR25DE]
INSPECTION AND ADJUSTMENT
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.
2. GO TO 4.
14.
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. Refer to
EC-121, "Idle Speed and Ignition
Without CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed. Refer to
EC-121, "Idle Speed and Ignition Timing Check"
.
OK or NG
OK
>> GO TO 15.
NG
>> GO TO 17.
15.
CHECK IGNITION TIMING AGAIN
1. Run engine at idle.
2. Check ignition timing with a timing light. Refer to
Speed and Ignition Timing Check"
OK or NG
OK
>> GO TO 19.
NG
>> GO TO 16.
16.
CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to
EM-46, "Removal and Installation"
OK or NG
OK
>> GO TO 17.
NG
>> 1. Repair the timing chain installation.
2. GO TO 4.
17.
DETECT MALFUNCTIONING PART
Check the following.
• Check camshaft position sensor (PHASE) and circuit. Refer to
EC-262, "Component Description"
.
• Check crankshaft position sensor (POS) and circuit. Refer to
EC-258, "Component Description"
.
OK or NG
OK
>> GO TO 18.
NG
>> 1. Repair or replace.
2. GO TO 4.
18.
CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of the incident,
although this is rare)
M/T: 625
± 50 rpm (in Neutral position)
A/T: 700
± 50 rpm (in P or N position)
M/T: 625
± 50 rpm (in Neutral position)
A/T: 700
± 50 rpm (in P or N position)
M/T: 15
± 5° BTDC (in Neutral position)
A/T: 15
± 5° BTDC (in P or N position)
BBIA0633E
INSPECTION AND ADJUSTMENT
EC-121
< BASIC INSPECTION >
[QR25DE]
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2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
EC-121, "Procedure After Replacing ECM"
.
>> GO TO 4.
19.
INSPECTION END
Did you replace ECM, referring this Basic Inspection procedure?
Yes or No
Yes
2. INSPECTION END
No
>> INSPECTION END
Idle Speed and Ignition Timing Check
INFOID:0000000009480756
IDLE SPEED
With CONSULT
Check idle speed in “DATA MONITOR” mode with CONSULT.
With GST
Check idle speed in Service $01 with GST.
IGNITION TIMING
Any of following two methods may be used.
1. Attach timing light to loop wire as shown.
2. Check ignition timing.
Procedure After Replacing ECM
INFOID:0000000009480757
DESCRIPTION
When replacing ECM, the following procedure must be performed. (For details, refer to OPERATION PROCE-
DURE.)
PROGRAMMING OPERATION
NOTE:
After replacing with a blank ECM, programming is required to write ECM information. Be sure to follow the pro-
cedure to perform the programming.
OPERATION PROCEDURE
BBIA0644E
BBIA0633E
EC-122
< BASIC INSPECTION >
[QR25DE]
INSPECTION AND ADJUSTMENT
1.
CHECK ECM PART NUMBER
Check ECM part number to see whether it is blank ECM or not.
NOTE:
• Part number of blank ECM is 23703 -
×××××.
• Check the part number when ordering ECM or with the one included in the label on the container box.
Is the ECM a blank ECM?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
SAVE ECM PART NUMBER
Read out the part number from the old ECM and save the number, following the programming instructions.
Refer to “CONSULT Operation Manual”.
NOTE:
• The ECM part number is saved in CONSULT.
• Even when ECM part number is not saved in CONSULT, go to 3.
>> GO TO 3.
3.
PERFORM ECM PROGRAMMING
After replacing ECM, perform the ECM programming. Refer to “CONSULT Operation Manual”.
NOTE:
During programming, maintain the following conditions:
• Ignition switch: ON
• Electric load: OFF
• Brake pedal: Not depressed
• Battery voltage: 12 – 13.5 V (Be sure to check the value of battery voltage by selecting “BATTERY VOLT” in
“Data monitor” of CONSULT.)
>> GO TO 5.
4.
REPLACE ECM
Replace ECM.
>> GO TO 5.
5.
PERFORM INITIALIZATION OF NVIS (NATS) SYSTEM AND REGISTRATION OF ALL NVIS (NATS) IGNI-
TION KEY IDS
Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
.
>> GO TO 6.
6.
PERFORM VIN REGISTRATION
Perform VIN REGISTRATION. Refer to
>> GO TO 7.
7.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
Perform accelerator pedal released position learning. Refer to
EC-123, "Accelerator Pedal Released Position
>> GO TO 8.
8.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform throttle valve closed position learning. Refer to
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