Infiniti I30 (A33). Manual — part 185

Overall Inspection Sequence

NHEC0028S0101

SEF554Y

NOTE:
If a vehicle contains a part which is operating outside of design specifications with no MIL illumination,
the part shall not be replaced prior to emission testing unless it is determined that the part has been
tampered with or abused in such a way that the diagnostic system cannot reasonably be expected to
detect the resulting malfunction.

GI

MA

EM

LC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

EC-55

INSPECTION PROCEDURE

=NHEC0028S02

1

INSPECTION START

1. Visually check the following:

I

Air cleaner clogging

I

Hoses and ducts for leaks

I

Electrical connectors

I

Gasket

I

Throttle valve and throttle position sensor operation

2. Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge.

Ensure engine stays below 1,000 rpm.

SEF976U

3. Open engine hood and run engine at about 2,000 rpm for about 2 minutes under no-load.

SEF977U

4. Make sure that no DTC is displayed with CONSULT-II or GST.

OK or NG

OK

©

GO TO 3.

NG

©

GO TO 2.

2

REPAIR OR REPLACE

Repair or replace components as necessary according to corresponding “Diagnostic Procedure”.

©

GO TO 3.

3

CHECK TARGET IDLE SPEED

With CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.

700

±

50 rpm (in “P” or “N” position)

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.

700

±

50 rpm (in “P” or “N” position)

OK or NG

OK

©

GO TO 12.

NG

©

GO TO 4.

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

EC-56

4

PERFORM IDLE AIR VOLUME LEARNING

Refer to “Idle Air Volume Learning”, EC-66.
Which is the result CMPLT or INCMP?

CMPLT or INCMP

CMPLT

©

GO TO 5.

INCMP

©

1. Follow the construction of “Idle Air Volume Leaning”.
2. GO TO 4.

5

CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.

700

±

50 rpm (in “P” or “N” position)

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.

700

±

50 rpm (in “P” or “N” position)

OK or NG

OK

©

GO TO 10.

NG

©

GO TO 6.

6

REPLACE IACV-AAC VALVE

Replace IACV-AAC valve.

©

GO TO 7.

7

PERFORM IDLE AIR VOLUME LEARNING

Refer to “Idle Air Volume Learning”, EC-66.
Which is the result CMPLT or INCMP?

CMPLT or INCMP

CMPLT

©

GO TO 8.

INCMP

©

1. Follow the construction of “Idle Air Volume Learning”.
2. GO TO 4.

8

CHECK TARGET IDLE SPEED AGAIN

With CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Select “ENG SPEED” in “DATA MONITOR” mode with CONSULT-II.
3. Check idle speed.

700

±

50 rpm (in “P” or “N” position)

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.

700

±

50 rpm (in “P” or “N” position)

OK or NG

OK

©

GO TO 10.

NG

©

GO TO 9.

GI

MA

EM

LC

FE

AT

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

EC-57

9

CHECK ECM FUNCTION

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but this is rarely

the case.)

2. Perform initialization of IVIS (NATS) system and registration of IVIS (NATS) ignition key IDs. Refer to “IVIS (INFINITI

VEHICLE IMMOBILIZER SYSTEM — NATS)”, EC-82.

©

GO TO 4.

10

CHECK IGNITION TIMING

1. Start engine and warm it up to normal operating temperature.
2. Check ignition timing at idle using a timing light.

SEF572X

Ignition timing:

15°

±

5° BTDC (in “P” or “N” position)

OK or NG

OK

©

GO TO 18.

NG

©

GO TO 11.

11

CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to EM-29, “Installation”.

OK or NG

OK

©

GO TO 9.

NG

©

1. Repair the timing chain installation.
2. GO TO 4.

BASIC SERVICE PROCEDURE

Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment (Cont’d)

EC-58