Nissan Frontier D22. Instruction — part 234

BASIC SERVICE PROCEDURE

EC-39

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

2.

CHECK IGNITION TIMING

With CONSULT-II

1.

Run engine at about 2,000 rpm for about 2 minutes under no-load.

2.

Rev engine two or three times under no-load, then run engine at
idle speed for about 1 minute.

3.

Select “IGNITION TIMING ADJ” in WORK SUPPORT mode.

4.

Touch “START”.

5.

Rev engine (2,000 to 3,000 rpm) two or three times under no-
load, then run engine at idle speed.

6.

Check ignition timing with a timing light.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

SEF978U

PEF546N

M/T

: 20

°±2° BTDC

A/T

: 20

°±2° BTDC (in P or N position)

SEF320V

EC-40

[KA24DE]

BASIC SERVICE PROCEDURE

3.

CHECK IGNITION TIMING

Without CONSULT-II

1.

Run engine at about 2,000 rpm for about 2 minutes under no-load.

2.

Rev engine two or three times under no-load, then run engine at
idle speed for about 1 minute.

3.

Stop engine and disconnect throttle position sensor harness
connector.

4.

Start engine and rev it (2,000 to 3,000 rpm) two or three times
under no-load, then run engine at idle speed.

5.

Check ignition timing with a timing light.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

SEF978U

SEF265S

M/T

: 20

°±2° BTDC

A/T

: 20

°±2° BTDC (in P or N position)

SEF320V

BASIC SERVICE PROCEDURE

EC-41

[KA24DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

4.

ADJUST IGNITION TIMING

With CONSULT-II

1.

Adjust ignition timing to the specified value by turning distributor after loosening bolts which secure distrib-
utor.

Without CONSULT-II

1.

Adjust ignition timing to the specified value by turning distributor after loosening bolts which secure distrib-
utor.

2.

Stop engine and connect throttle position sensor harness con-
nector to throttle position sensor.

With CONSULT-II >> GO TO 2.
Without CONSULT-II >> GO TO 3.

5.

CHECK BASE IDLE SPEED

With CONSULT-II

1.

Read idle speed in “IGNITION TIMING ADJ” in “WORK SUP-
PORT” mode.

Without CONSULT-II

1.

Check idle speed.

OK or NG

OK (With CONSULT-II) >> GO TO 7.
OK (Without CONSULT-II) >> GO TO 8.
NG

>> GO TO 6.

6.

ADJUST BASE IDLE SPEED

1.

Rev engine (2,000 to 3,000 rpm) two or three times under no-load, then run engine at idle speed.

2.

Adjust idle speed by turning idle speed adjusting screw.

With CONSULT-II >> GO TO 7.
Without CONSULT-II >> GO TO 8.

SEF265S

M/T

: 750

±50 rpm

A/T

: 750

±50 rpm (in P or N position)

M/T

: 750

±50 rpm

A/T

: 750

±50 rpm (in P or N position)

SEF713Z

M/T

: 750

±50 rpm

A/T

: 750

±50 rpm (in P or N position)

SEF240SA

EC-42

[KA24DE]

BASIC SERVICE PROCEDURE

7.

CHECK TARGET IDLE SPEED

With CONSULT-II

1.

Touch “BACK” on CONSULT-II.

2.

Rev engine (2,000 to 3,000 rpm) two or three times under no-
load, then run engine at idle speed.

3.

Read idle speed in “DATA MONITOR” mode with CONSULT-II.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 9.

8.

CHECK TARGET IDLE SPEED

Without CONSULT-II

1.

Stop engine and connect throttle position sensor harness con-
nector.

2.

Start engine.

3.

Rev engine (2,000 to 3,000 rpm) two or three times under no-
load, then run engine at idle speed.

4.

Check target idle speed.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 9.

9.

DETECT MALFUNCTIONING PART

Check the following.
1.

Check IACV-AAC valve and replace if necessary. Refer to

EC-397

,

EC-402

.

2.

Check IACV-AAC valve harness and repair if necessary. Refer to

EC-392

.

3.

Check ECM function by substituting another known-good ECM.
(ECM may be the cause of an incident, but this is rare a case.)

>> GO TO 10.

SEF602K

M/T

: 800

±50 rpm

A/T

: 800

±50 rpm (in P or N position)

SEF058Y

M/T

: 800

±50 rpm

A/T

: 800

±50 rpm (in P or N position)

SEF265S