Nissan Titan. Manual — part 206
INSPECTION AND ADJUSTMENT
EC-125
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1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is a rare case.)
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
SEC-7, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"
.
>> GO TO 4.
21.
INSPECTION END
Did you replace ECM, referring this Basic Inspection procedure?
Yes or No
Yes
EC-125, "Procedure After Replacing ECM"
.
2. INSPECTION END
No
>> INSPECTION END
Idle Speed and Ignition Timing Check
INFOID:0000000009886523
IDLE SPEED
With CONSULT
Check idle speed in “DATA MONITOR” mode with CONSULT.
With GST
Check idle speed with GST.
IGNITION TIMING
1. Attach timing light to loop wire as shown.
2. Check ignition timing.
Procedure After Replacing ECM
INFOID:0000000010135274
DESCRIPTION
When replacing ECM, the following procedure must be performed.
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
BBIA0377E
BBIA0379E
EC-126
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INSPECTION AND ADJUSTMENT
1.
SAVE ECM DATA
With CONSULT
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Turn ignition switch ON.
4. Select “SAVING DATA FOR REPLC CPU” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.
5. Follow the instruction of CONSULT display.
NOTE:
• Necessary data in ECM is copied and saved to CONSULT.
• Go to Step 2 regardless of with or without success in saving data.
>> GO TO 2.
2.
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 part number when ordering ECM or the one included in the label on the container box.
Is the ECM a blank ECM?
YES
>> GO TO 3.
NO
>> GO TO 5.
3.
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 4.
>> GO TO 4.
4.
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 6.
5.
REPLACE ECM
Replace ECM.
>> GO TO 6.
6.
PERFORM INITIALIZATION OF IVIS (NATS) SYSTEM AND REGISTRATION OF ALL IVIS (NATS) IGNI-
TION KEY IDS
Refer to
SEC-7, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"
>> GO TO 7.
7.
CHECK ECM DATA STATUS
Check if the data is successfully copied from the ECM at Step 1 (before replacement) and saved in CONSULT.
Is the data saved successfully?
INSPECTION AND ADJUSTMENT
EC-127
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YES
>> GO TO 8.
NO
>> GO TO 9.
8.
WRITE ECM DATA
With CONSULT
1. Select “WRITING DATA FOR REPLC CPU” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.
2. Follow the instruction of CONSULT display.
NOTE:
The data saved by “SAVING DATA FOR REPLC CPU” is written to ECM.
>> GO TO 10.
9.
PERFORM VIN REGISTRATION
>> GO TO 10.
10.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
Perform Accelerator Pedal Released Position Learning. Refer to
EC-128, "Accelerator Pedal Released Posi-
.
>> GO TO 11.
11.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform Throttle Valve Closed Position Learning. Refer to
EC-128, "Throttle Valve Closed Position Learning"
>> GO TO 12.
12.
CHECK THE VEHICLE’S FUEL TYPE
Check the vehicle information. Refer to
.
Is the vehicle a Flexible Fuel Vehicle?
YES
>> GO TO 13.
NO
>> GO TO 14.
13.
PERFORM ETHANOL MIXTURE RATIO ADAPTATION
Perform
EC-128, "Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle)"
>> GO TO 14.
14.
PERFORM IDLE AIR VOLUME LEARNING
Perform Idle Air Volume Learning. Refer to
EC-129, "Idle Air Volume Learning"
>> END
VIN Registration
INFOID:0000000010135275
DESCRIPTION
VIN Registration is an operation to registering VIN in ECM. It must be performed each time ECM is replaced.
NOTE:
Accurate VIN which is registered in ECM may be required for Inspection & Maintenance (I/M).
OPERATION PROCEDURE
With CONSULT
1. Check the VIN of the vehicle and note it. Refer to
GI-24, "Identification Number"
.
2. Turn ignition switch ON and engine stopped.
3. Select “VIN REGISTRATION” in “WORK SUPPORT” mode of “ENGINE”.
EC-128
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INSPECTION AND ADJUSTMENT
4. Follow the instruction of CONSULT display.
Accelerator Pedal Released Position Learning
INFOID:0000000009886526
DESCRIPTION
Accelerator Pedal Released Position Learning is an operation to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time
harness connector of accelerator pedal position sensor or ECM is disconnected.
OPERATION PROCEDURE
1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch ON and wait at least 2 seconds.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF and wait at least 10 seconds.
Throttle Valve Closed Position Learning
INFOID:0000000009886527
DESCRIPTION
Throttle Valve Closed Position Learning is a function of ECM to learn the fully closed position of the throttle
valve by monitoring the throttle position sensor output signal. It must be performed each time the harness con-
nector of the electric throttle control actuator or ECM is disconnected or electric throttle control actuator inside
is cleaned.
OPERATION PROCEDURE
With CONSULT
1. Turn ignition switch ON.
2. Select “CLSD THL POS LEARN” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.
3. Follow the instructions on the CONSULT display.
4. Turn ignition switch OFF and wait at least 10 seconds.
Check that throttle valve moves during the above 10 seconds by confirming the operating sound.
Without CONSULT
1. Start the engine.
NOTE:
Engine coolant temperature is 25
°C (77°F) or less before engine starts.
2. Warm up the engine.
NOTE:
Raise engine coolant temperature until it reaches 65
°C (149°F) or more.
3. Turn ignition switch OFF and wait at least 10 seconds.
Check that throttle valve moves during the above 10 seconds by confirming the operating sound.
Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle)
INFOID:0000000009886528
DESCRIPTION
Ethanol mixture ratio adaptation is an operation to change the ethanol mixture ratio presumed by ECM. It must
be performed when engine does not start after replacing ECM. It is not necessary to be performed when
engine can start.
OPERATION PROCEDURE
With CONSULT
1. Turn ignition switch ON.
2. Select “ETHANOL M/R ADJ” in “WORK SUPPORT” mode with CONSULT, then touch “START”.
3. Select “E35” and then touch “UPDATE”.
4. Crank engine and make sure that engine starts.
If NG, go to next step.
5. Select “E70” and then touch “UPDATE”.
6. Crank engine and make sure that engine starts.
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