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Nissan Titan. Manual - part 177

PRECAUTIONS

EC-9

< PRECAUTION >

[VK56DE]

Precaution

INFOID:0000000009886486

• Always use a 12 volt battery as power source.

• Do not attempt to disconnect battery cables while engine is

running.

• Before connecting or disconnecting the ECM harness con-

nector, turn ignition switch OFF and disconnect negative bat-

tery cable. Failure to do so may damage the ECM because

battery voltage is applied to ECM even if ignition switch is

turned OFF.

• Before removing parts, turn ignition switch OFF and then dis-

connect negative battery cable.

• Do not disassemble ECM.

• If a battery cable is disconnected, the memory will return to

the ECM value.

The ECM will now start to self-control at its initial value.

Engine operation can vary slightly when the terminal is dis-

connected. However, this is not an indication of a malfunc-

tion. Do not replace parts because of a slight variation.

• If the battery is disconnected, the following emission-related

diagnostic information will be lost within 24 hours.

- Diagnostic trouble codes

- 1st trip diagnostic trouble codes

- Freeze frame data

- 1st trip freeze frame data

- System readiness test (SRT) codes

- Test values

- <Flexible Fuel Vehicle>

Presumed ethanol mixture ratio

• When connecting ECM harness connector, fasten it securely

with a lever as far as it will go as shown in the figure.

• When connecting or disconnecting pin connectors into or

from ECM, take care not to damage pin terminals (bend or

break).

Make sure that there are not any bends or breaks on ECM pin

terminal, when connecting pin connectors.

• Securely connect ECM harness connectors.

A poor connection can cause an extremely high (surge) volt-

age to develop in coil and condenser, thus resulting in dam-

age to ICs.

• Keep engine control system harness at least 10 cm (4 in) away

from adjacent harness, to prevent engine control system mal-

functions due to receiving external noise, degraded operation

of ICs, etc.

• Keep engine control system parts and harness dry.

SEF289H

PBIB1164E

BBIA0387E

PBIB0090E

EC-10

< PRECAUTION >

[VK56DE]

PRECAUTIONS

• Before replacing ECM, perform ECM Terminals and Reference

Value inspection and make sure ECM functions properly.

Refer to

EC-64, "ECM Terminal and Reference Value"

• Handle mass air flow sensor carefully to avoid damage.

• Do not disassemble mass air flow sensor.

• Do not clean mass air flow sensor with any type of detergent.

• Do not disassemble electric throttle control actuator.

• Even a slight leak in the air intake system can cause serious

incidents.

• Do not shock or jar the camshaft position sensor (PHASE),

crankshaft position sensor (POS).

• After performing each TROUBLE DIAGNOSIS, perform DTC

Confirmation Procedure or Overall Function Check.

The DTC should not be displayed in the DTC Confirmation

Procedure if the repair is completed. The Overall Function

Check should be a good result if the repair is completed.

• When measuring ECM signals with a circuit tester, never allow

the two tester probes to contact.

Accidental contact of probes will cause a short circuit and

damage the ECM power transistor.

• Do not use ECM ground terminals when measuring input/out-

put voltage. Doing so may result in damage to the ECM's tran-

sistor. Use a ground other than ECM terminals, such as the

ground.

• B1 indicates the bank 1, B2 indicates the bank 2 as shown in

the figure.

MEF040D

JSBIA1315ZZ

SEF348N

PBIB1144E

PRECAUTIONS

EC-11

< PRECAUTION >

[VK56DE]

• Do not operate fuel pump when there is no fuel in lines.

• Tighten fuel hose clamps to the specified torque.

• Do not depress accelerator pedal when starting.

• Immediately after starting, do not rev up engine unnecessar-

ily.

• Do not rev up engine just prior to shutdown.

• When installing C.B. ham radio or a mobile phone, be sure to

observe the following as it may adversely affect electronic

control systems depending on installation location.

- Keep the antenna as far as possible from the electronic con-

trol units.

- Keep the antenna feeder line more than 20 cm (8 in) away

from the harness of electronic controls.

Do not let them run parallel for a long distance.

- Adjust the antenna and feeder line so that the standing-wave

radio can be kept smaller.

- Be sure to ground the radio to vehicle body.

• <Flexible Fuel Vehicle>

When replacing the ECM, there is a small possibility that engine does not start under cold weather.

This is caused by the large difference between the actual and the presumed ethanol mixture ratio. In

such a case, perform

EC-128, "Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle)"

BBIA0402E

SEF709Y

SEF708Y

EC-12

< PREPARATION >

[VK56DE]

PREPARATION

PREPARATION

Special Service Tool

INFOID:0000000009886487

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

Tool number
(Kent-Moore No.)
Tool name

Description

EG17650301
(J-33984-A)
Radiator cap tester
adapter

Adapting radiator cap tester to radiator cap and ra-
diator filler neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)

KV10117100
(J-36471-A)
Heated oxygen sensor
wrench

Loosening or tightening heated oxygen sensors
with 22 mm (0.87 in) hexagon nut

KV10114400
(J-38365)
Heated oxygen sensor
wrench

Loosening or tightening heated oxygen sensors
a: 22 mm (0.87 in)

(J-44626)
Air fuel ratio (A/F) sen-
sor wrench

Loosening or tightening air fuel ratio (A/F) sensor 1

(J-44321)
Fuel pressure gauge
kit

Checking fuel pressure

(J-44321-6)
Fuel pressure adapter

Connecting fuel pressure gauge to quick connec-
tor type fuel lines.

S-NT564

S-NT379

S-NT636

LEM054

LEC642

LBIA0376E

Content .. 175 176 177 178 ..