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Nissan Titan. Manual - part 189

DIAGNOSIS SYSTEM (ECM)

EC-57

< SYSTEM DESCRIPTION >

[VK56DE]

*1: This function is not necessary in the usual service procedure.
*2: For Flexible Fuel Vehicle

ACTIVE TEST MODE

Test Item

TARGET IGN TIM ADJ*

• IDLE CONDITION

When adjusting target ignition tim-
ing

CLSD THL POS LEARN

• Ignition on and engine stopped.

When learning the throttle valve
closed position

SAVING DATA FOR REPLC CPU

In this mode, save data that is in ECM.

When ECM is replaced.

WRITING DATA FOR REPLC CPU

In this mode, write data stored by “SAVE DATA FOR CPU
REPLC” in work support mode to ECM.

When ECM is replaced.

WORK ITEM

CONDITION

USAGE

TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

FUEL INJEC-
TION

• Engine: Return to the original

trouble condition

• Change the amount of fuel injec-

tion using CONSULT.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1

ENG COOLANT
TEMP

• Engine: Return to the original

trouble condition

• Change the engine coolant tem-

perature using CONSULT.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Engine coolant temperature sen-

sor

• Fuel injector

PURG VOL
CONT/V

• Engine: After warming up, run en-

gine at 1,500 rpm.

• Change the EVAP canister purge

volume control solenoid valve
opening percent using CON-
SULT.

Engine speed changes according to
the opening percent.

• Harness and connectors
• Solenoid valve

FUEL/T TEMP
SEN

• Change the fuel tank temperature using CONSULT.

ALTERNATOR
DUTY

• Engine: Idle
• Change duty ratio using CON-

SULT.

Battery voltage changes.

• Harness and connectors
• IPDM E/R
• Alternator

FUEL PUMP RE-
LAY

• Ignition switch: ON

(Engine stopped)

• Turn the fuel pump relay ON and

OFF using CONSULT and listen
to operating sound.

Fuel pump relay makes the operat-
ing sound.

• Harness and connectors
• Fuel pump relay

IGNITION TIM-
ING

• Engine: Return to the original

trouble condition

• Timing light: Set
• Retard the ignition timing using

CONSULT.

If trouble symptom disappears, see
CHECK ITEM.

• Perform Idle Air Volume Learning.

POWER BAL-
ANCE

• Engine: After warming up, idle the

engine.

• A/C switch: OFF
• Selector lever: P or N
• Cut off each injector signal one at

a time using CONSULT.

Engine runs rough or dies.

• Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil

EC-58

< SYSTEM DESCRIPTION >

[VK56DE]

DIAGNOSIS SYSTEM (ECM)

DTC WORK SUPPORT MODE

Test Item

*: DTC P1442 and P1456 does not apply to A60 models but appears in DTC Work Support Mode screens.

SRT & P-DTC MODE

SRT STATUS Mode

• For items whose SRT codes are set, “CMPLT” is displayed on the CONSULT screen; for items whose SRT

codes are not set, “INCMP” is displayed.

• “SRT STATUS” provides the presence or absence of permanent DTCs stored in ECM memory.

PERMANENT DTC STATUS Mode

How to display permanent DTC status

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Select “PERMANENT DTC STATUS” in “DTC & SRT CONFIRMATION” mode with CONSULT.

NOTE:

Permanent DTCs stored in ECM memory are displayed on the CONSULT screen to show if a driving pat-

tern required for erasing permanent DTCs is complete (CMPLT) or incomplete (INCMP).

CAUTION:

VENT CON-
TROL/V

• Ignition switch: ON

(Engine stopped)

• Turn solenoid valve ON and OFF

with the CONSULT and listen to
operating sound.

Solenoid valve makes an operating
sound.

• Harness and connectors
• Solenoid valve

V/T ASSIGN AN-
GLE

• Engine: Return to the original

trouble condition

• Change intake valve timing using

CONSULT.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Intake valve timing control sole-

noid valve

TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

Test mode

Test item

Corresponding DTC No.

Reference page

A/F SEN1

A/F SEN1 (B1) P1278/P1279

P0133

EC-215

A/F SEN1 (B1) P1276

P0130

EC-205

A/F SEN1 (B2) P1288/P1289

P0153

EC-215

A/F SEN1 (B2) P1286

P0150

EC-205

EVAPORATIVE
SYSTEM

EVP V/S LEAK P0456/P1456*

P0442

EC-289

P0456

EC-333

PURG FLOW P0441

P0441

EC-284

PURG VOL CN/V P1444

P0443

EC-296

HO2S2

HO2S2 (B1) P1146

P0138

EC-226

HO2S2 (B1) P1147

P0137

EC-221

HO2S2 (B1) P0139

P0139

EC-233

HO2S2 (B2) P1166

P0158

EC-226

HO2S2 (B2) P1167

P0157

EC-221

HO2S2 (B2) P0159

P0159

EC-233

DIAGNOSIS SYSTEM (ECM)

EC-59

< SYSTEM DESCRIPTION >

[VK56DE]

Since the “PERMANENT DTC STATUS” screen displays the previous trip information, repeat the

following twice to update the information: “Ignition switch OFF”, “Wait for more than 10 seconds”

and “Ignition switch ON”.

NOTE:

This mode is not used in regions that permanent DTCs are not regulated by law.

SRT WORK SUPPORT Mode

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

PERMANENT DTC WORK SUPPORT Mode

This mode enables a technician to drive a vehicle to complete the driving pattern that is required for erasing

permanent DTC.

NOTE:

This mode is not used in regions that permanent DTCs are not regulated by law.

JSBIA0062GB

EC-60

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

ECU DIAGNOSIS INFORMATION

ECM

CONSULT Reference Value in Data Monitor Mode

INFOID:0000000009886513

NOTE:

• The following table includes information (items) inapplicable to this vehicle. For information (items) applica-

ble to this vehicle, refer to CONSULT display items.

• Numerical values in the following table are reference values.

• These values are input/output values that ECM receives/transmits and may differ from actual operations.

Example:

The ignition timing shown by the timing light may differ from the ignition timing displayed on the data monitor.

This occurs because the timing light shows a value calculated by ECM according to signals received from

the cam shaft position sensor and other sensors related to ignition timing.

For outlines of following items, refer to

EC-49, "CONSULT Function"

MONITOR ITEM

CONDITION

SPECIFICATION

ENG SPEED

• Run engine and compare CONSULT value with the tachometer in-

dication.

Almost the same speed as the
tachometer indication.

MAS A/F SE-B1

See

EC-143

B/FUEL SCHDL

See

EC-143

A/F ALPHA-B1
A/F ALPHA-B2

See

EC-143

COOLANT TEMP/S

• Engine: After warming up

More than 70

°C (158°F)

A/F SEN1 (B1)

• Engine: After warming up

Maintaining engine speed at 2,000
rpm

Fluctuates around 2.2 V

HO2S2 (B1)
HO2S2 (B2)

• Revving engine from idle to 3,000 rpm quickly after the following

conditions are met.

• After keeping engine speed between 3,500 and 4,000 rpm for 1

minute and at idle for 1 minute under no load

0 - 0.3V

←→ Approx. 0.6 - 1.0V

HO2S2 MNTR (B1)
HO2S2 MNTR (B2)

• Revving engine from idle to 3,000 rpm quickly after the following

conditions are met.

- Engine: After warming up
- Keeping engine speed between 3,500 and 4,000 rpm for 1 minute

and at idle for 1 minute under no load

LEAN

←→ RICH

VHCL SPEED SE

• Turn drive wheels and compare CONSULT value with the speed-

ometer indication.

Almost the same speed as the
speedometer indication

BATTERY VOLT

• Ignition switch: ON (Engine stopped)

11 - 14V

ACCEL SEN 1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0V

Accelerator pedal: Fully de-
pressed

4.2 - 4.8V

ACCEL SEN 2*

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0V

Accelerator pedal: Fully de-
pressed

4.2 - 4.8V

TP SEN 1-B1
TP SEN 2-B1

• Ignition switch: ON

(Engine stopped)

• Selector lever: D

Accelerator pedal: Fully released

More than 0.36V

Accelerator pedal: Fully de-
pressed

Less than 4.75V

FUEL T/TMP SE

• Ignition switch: ON

Indicates fuel tank temperature.

EVAP SYS PRES

• Ignition switch: ON

Approx. 1.8 - 4.8V

FUEL LEVEL SE

• Ignition switch: ON

Depending on fuel level of fuel
tank.

START SIGNAL

• Ignition switch: ON

→ START → ON

OFF

→ ON → OFF

Content .. 187 188 189 190 ..