Nissan Titan. Instruction — part 207
INSPECTION AND ADJUSTMENT
EC-129
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Without CONSULT
1. Turn ignition switch ON.
2. Fully depress the accelerator pedal.
3. Repeat the following procedure quickly for 50 times.
a. Turn ignition switch to START position and immediately return to ON position.
4. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.
5. Fully release the accelerator pedal.
6. Crank engine and make sure that engine starts.
Idle Air Volume Learning
INFOID:0000000009886529
DESCRIPTION
Idle Air Volume Learning is an operation to learn the idle air volume that keeps each engine within the specific
range. It must be performed under any of the following conditions:
• Each time electric throttle control actuator or ECM is replaced.
• Idle speed or ignition timing is out of specification.
PREPARATION
Before performing Idle Air Volume Learning, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.
• Battery voltage: More than 12.9V (At idle)
• Engine coolant temperature: 70 - 100
°C (158 - 212°F)
• Select lever: P or N
• Electric load switch: OFF
(Air conditioner, headlamp)
On vehicles equipped with daytime light systems, if the parking brake is applied before the engine is
start the headlamp will not be illuminated.
• Steering wheel: Neutral (Straight-ahead position)
• Vehicle speed: Stopped
• Transmission: Warmed-up
- With CONSULT: Drive vehicle until “ATF TEMP SE 1” in “DATA MONITOR” mode of “A/T” system indicates
less than 0.9V.
- Without CONSULT: Drive vehicle for 10 minutes.
OPERATION PROCEDURE
With CONSULT
1. Perform
EC-128, "Accelerator Pedal Released Position Learning"
.
2. Perform
EC-128, "Throttle Valve Closed Position Learning"
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5. Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.
6. Touch “START” and wait 20 seconds.
7. Make sure that “CMPLT” is displayed on CONSULT screen. If “CMPLT” is not displayed, Idle Air Volume
Learning will not be carried out successfully. In this case, find the cause of the incident by referring to the
DIAGNOSTIC PROCEDURE below.
8. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the
specifications.
Without CONSULT
NOTE:
ITEM
SPECIFICATION
Idle speed
650
± 50 rpm (in P or N position)
Ignition timing
15
± 5° BTDC (in P or N position)
EC-130
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INSPECTION AND ADJUSTMENT
• It is better to count the time accurately with a clock.
• It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has
a malfunction.
1. Perform
EC-128, "Accelerator Pedal Released Position Learning"
2. Perform
EC-128, "Throttle Valve Closed Position Learning"
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
7. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops
blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the MIL turned ON.
10. Start engine and let it idle.
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the
specifications.
13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried
out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE-
DURE below.
DIAGNOSTIC PROCEDURE
If idle air volume learning cannot be performed successfully, proceed as follows:
1. Check that throttle valve is fully closed.
2. Check PCV valve operation.
3. Check that downstream of throttle valve is free from air leakage.
4. When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and eliminate the cause of the incident.
It is useful to perform
.
5. If any of the following conditions occur after the engine has started, eliminate the cause of the
incident and perform Idle Air Volume Learning all over again:
• Engine stalls.
• Erroneous idle.
ITEM
SPECIFICATION
Idle speed
650
± 50 rpm (in P or N position)
Ignition timing
15
± 5° BTDC (in P or N position)
SEC897C
HOW TO SET SRT CODE
EC-131
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HOW TO SET SRT CODE
Description
INFOID:0000000009886530
OUTLINE
In order to set all SRTs, the self-diagnoses as in the “SRT ITEM” table must have been performed at least
once. Each diagnosis may require actual driving for a long period of time under various conditions.
SRT ITEM
The table below shows required self-diagnostic items to set the SRT to “CMPLT”.
*: If completion of several SRTs is required, perform driving patterns (DTC confirmation procedure), one by one based on the priority for
models with CONSULT.
SRT SERVICE PROCEDURE
If a vehicle has failed the state emissions inspection due to one or more SRT items indicating “INCMP”, review
the flowchart diagnostic sequence, referring to the following flowchart.
SRT item
(CONSULT indication)
Performance
Priority*
Required self-diagnostic items to set the SRT to “CMPLT”
Corresponding
DTC No.
CATALYST
2
Three way catalyst function
P0420, P0430
EVAP SYSTEM
2
EVAP control system purge flow monitoring
P0441
1
EVAP control system
P0442
2
EVAP control system
P0456
HO2S
2
Air fuel ratio (A/F) sensor 1
P0133, P0153
Heated oxygen sensor 2
P0137, P0157
Heated oxygen sensor 2
P0138, P0158
Heated oxygen sensor 2
P0139, P0159
EC-132
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HOW TO SET SRT CODE
SRT Set Driving Pattern
INFOID:0000000009886531
CAUTION:
JSBIA0400GB
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