Content .. 184 185 186 187 ..

Infiniti I30 (A33). Manual - part 186

CHECK IGNITION TIMING

1. Start engine and let it idle.
2. Check ignition timing at idle using a timing light.

SEF572X

Ignition timing:

15°

5° BTDC (in “P” or “N” position)

OK or NG

GO TO 18.

GO TO 13.

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 14.

INCMP

1. Follow the construction of “Idle Air volume Learning”.
2. GO TO 13.

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

GO TO 16.

GO TO 15.

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 13.

IDX

BASIC SERVICE PROCEDURE

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

EC-59

CHECK IGNITION TIMING AGAIN

Check ignition timing again. Refer to Test No. 12.

OK or NG

GO TO 18.

GO TO 17.

CHECK TIMING CHAIN INSTALLATION

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

OK or NG

GO TO 15.

1. Repair the timing chain installation.
2. GO TO 13.

ERASE UNNECESSARY DTC

After this inspection, unnecessary DTC No. might be displayed.
Erase the stored memory in ECM and TCM (Transmission control module).
Refer to “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”, EC-80 and AT-38, “HOW TO ERASE
DTC”.

With CONSULT-II

GO TO 19.

Without CONSULT-II

GO TO 20.

CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 2) SIGNAL

With CONSULT-II

1. Run engine at about 2,000 rpm for about 2 minutes under no-load.
2. See “HO2S1 MNTR (B2)” in “DATA MONITOR” mode.
3. Running engine at 2,000 rpm under no-load (engine is warmed up to normal operating temperature.), check that the

monitor fluctuates between “LEAN” and “RICH” more than 5 times during 10 seconds.

SEF999Z

OK or NG

GO TO 23.

NG (Monitor does not
fluctuate.)

GO TO 28.

NG (Monitor fluctuates
less than 5 times.)

GO TO 21.

BASIC SERVICE PROCEDURE

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

EC-60

CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 2) SIGNAL

Without CONSULT-II

1. Run engine at about 2,000 rpm for about 2 minutes under no-load.
2. Set voltmeter probe between ECM terminal 62 and ground.
3. Make sure that the voltage fluctuates between 0 - 0.3V and 0.6 - 1.0V more than 5 times during 10 seconds at 2,000

rpm.
1 time: 0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

2 times: 0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

OK or NG

GO TO 23.

NG (Voltage does not
fluctuate.)

GO TO 28.

NG (Voltage fluctuates
less than 5 times.)

GO TO 21.

CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 2) SIGNAL

With CONSULT-II

1. Stop engine.
2. Replace heated oxygen sensor 1 (front) (bank 2).
3. Start engine and warm it up to normal operating temperature.
4. Run engine at approx. 2,000 rpm for approx. 2 minutes under no-load.
5. See “HO2S1 MNTR (B2)” in “DATA MONITOR” mode.
6. Running engine at 2,000 rpm under no-load (engine is warmed up to normal operating temperature.), check that the

monitor fluctuates between “LEAN” and “RICH” more than 5 times during 10 seconds.
1 time: RICH

→

LEAN

→

RICH

2 times: RICH

→

LEAN

→

RICH

→

LEAN

→

RICH

Without CONSULT-II

1. Stop engine.
2. Replace heated oxygen sensor 1 (front) (bank 2).
3. Start engine and warm it up to normal operating temperature.
4. Run engine at approx. 2,000 rpm for approx. 2 minutes under no-load.
5. Set voltmeter probe between ECM terminal 62 and ground.
6. Make sure that the voltage fluctuates between 0 - 0.3V and 0.6 - 1.0V more than 5 times during 10 seconds at 2,000

rpm.
1 time: 0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

2 times: 0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

OK or NG

OK (With CONSULT-II)

GO TO 23.

OK (Without CONSULT-
II)

GO TO 24.

GO TO 22.

DETECT MALFUNCTIONING PART

Check the following.
1. Check fuel pressure regulator. Refer to EC-50.
2. Check mass air flow sensor and its circuit. Refer to EC-152.
3. Check injector and its circuit. Refer to EC-608.

Clean or replace if necessary.

4. Check engine coolant temperature sensor and its circuit. Refer to EC-187.
5. Check ECM function by substituting another known-good ECM.

(ECM may be the cause of a problem, but this is rarely the case.)

GO TO 3.

IDX

BASIC SERVICE PROCEDURE

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

EC-61

CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 1) SIGNAL

With CONSULT-II

1. See “HO2S1 MNTR (B1)” in “DATA MONITOR” mode.
2. Maintaining engine at 2,000 rpm under no-load (engine is warmed up to normal operating temperature.), check that the

monitor fluctuates between “LEAN” and “RICH” more than 5 times during 10 seconds.

SEF999Z

OK or NG

INSPECTION END

NG (Monitor does not
fluctuate.)

GO TO 27.

NG (Monitor fluctuates
less than 5 times.)

GO TO 25.

CHECK HEATED OXYGEN SENSOR 1 (FRONT) (BANK 1) SIGNAL

Without CONSULT-II

1. Set voltmeter probe between ECM terminal 63 and ground.
2. Make sure that the voltage fluctuates between 0 - 0.3V and 0.6 - 1.0V more than 5 times during 10 seconds at 2,000

rpm.
1 time: 0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

2 times: 0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

OK or NG

INSPECTION END

NG (Voltage does not
fluctuate.)

GO TO 27.

NG (Voltage fluctuates
less than 5 times.)

GO TO 25.

BASIC SERVICE PROCEDURE

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

EC-62

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