Infiniti I35 (A33). Manual - part 187

SAT859K

The emission related diagnostic information in the ECM can be erased by selecting “ERASE” in the “SELF-
DIAG RESULTS” mode with CONSULT-II.
If DTCs are displayed for both ECM and TCM (Transmission control module), they need to be erased indi-
vidually from the ECM and TCM (Transmission control module).

How to Erase DTC (

With GST)

NHEC0031S0602

NOTE:
If the DTC is not for A/T related items (see EC-9), skip step 2.
1. If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10

seconds and then turn it ON (engine stopped) again.

2. Perform “How to Erase DTC (with GST)”, AT-39. (The DTC in TCM will be erased.)
3. Select Mode 4 with GST (Generic Scan Tool).

How to Erase DTC (

No Tools)

NHEC0031S0604

NOTE:
If the DTC is not for A/T related items (see EC-9), skip step 2.
1. If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10

seconds and then turn it ON (engine stopped) again.

2. Perform “How to Erase DTC (No Tools)”, AT-39. (The DTC in TCM will be erased.)
3. Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal. Refer to

EC-91, “HOW TO SWITCH DIAGNOSTIC MODE”.

If the battery is disconnected, the emission-related diagnostic information will be lost within 24
hours.

The following data are cleared when the ECM memory is erased.

1) Diagnostic trouble codes
2) 1st trip diagnostic trouble codes

IDX

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EC-89

3) Freeze frame data
4) 1st trip freeze frame data
5) System readiness test (SRT) codes
6) Test values
7) Others
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but
all of the data listed above, are cleared from the ECM memory during work procedures.

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

NHEC0031S08

SEF515Y

If the security indicator lights up with the ignition switch in the “ON” position or “NATS MALFUNC-
TION” is displayed on “SELF-DIAG RESULTS” screen, perform self-diagnostic results mode with
CONSULT-II using IVIS program card. Refer to “IVIS (Infiniti Vehicle Immobilizer System — NATS)”
EL-375.

Confirm no self-diagnostic results of IVIS (NATS) is displayed before touching “ERASE” in “SELF-
DIAG RESULTS” mode with CONSULT-II.

When replacing ECM, initialization of IVIS (NATS) system and registration of all IVIS (NATS) igni-
tion key IDs must be carried out with CONSULT-II using NATS program card.
Therefore, be sure to receive all keys from vehicle owner. Regarding the procedures of IVIS (NATS)
initialization and IVIS (NATS) ignition key ID registration, refer to CONSULT-II operation manual,
IVIS/NVIS.

Malfunction Indicator Lamp (MIL)

NHEC1189

DESCRIPTION

NHEC1189S01

The MIL is located on the instrument panel.
1. The MIL will light up when the ignition switch is turned ON without the engine running. This is a bulb check.

If the MIL does not light up, refer to “WARNING LAMPS”, EL-150 or see DTC P0650 MIL (CIRCUIT), EC-444.

2. When the engine is started, the MIL should go off. If the MIL remains on, the on board diagnostic system

has detected an engine system malfunction.

SEF217U

ON BOARD DIAGNOSTIC SYSTEM FUNCTION

NHEC1189S02

The on board diagnostic system has the following four functions.

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EC-90

Diagnostic Test
Mode

KEY and ENG.
Status

Function

Explanation of Function

Mode I

Ignition switch in
ON position

Engine stopped

BULB CHECK

This function checks the MIL bulb for damage (blown,
open circuit, etc.).
If the MIL does not come on, check MIL circuit.

Engine running

MALFUNCTION WARNING

This is a usual driving condition. When a malfunction is
detected twice in two consecutive driving cycles (two trip
detection logic), the MIL will light up to inform the driver
that a malfunction has been detected. The following mal-
functions will light up or blink the MIL in the 1st trip.

“Misfire (Possible three way catalyst damage)”

“One trip detection diagnoses”

Mode II

Ignition switch in
ON position

Engine stopped

SELF-DIAGNOSTIC RESULTS

This function allows DTCs and 1st trip DTCs to be read.

Engine running

HEATED OXYGEN SENSOR 1
MONITOR

This function allows the fuel mixture condition (lean or
rich), monitored by heated oxygen sensor 1, to be read.

MIL Flashing without DTC

NHEC1189S0201

If the ECM is in Diagnostic Test Mode II, MIL may flash when engine is running. In this case, check ECM
diagnostic test mode. How to Switch Diagnostic Test Mode.
How to switch the diagnostic test (function) modes, and details of the above functions are described later. How
to Switch Diagnostic Test Mode.
The following emission-related diagnostic information is cleared when the ECM memory is erased.
1. Diagnostic trouble codes
2. 1st trip diagnostic trouble codes
3. Freeze frame data
4. 1st trip freeze frame data
5. System readiness test (SRT) codes
6. Test values
7. Others

HOW TO SWITCH DIAGNOSTIC TEST MODE

NHEC1189S03

NOTE:

It is better to count the time accurately with a clock.

It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.

Always ECM returns to Diagnostic Test Mode I after ignition switch is turned OFF.

How to Set Diagnostic Test Mode II (Self-diagnostic Results)

NHEC1189S0301

1. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
2. Repeat the following procedure quickly five times within 5 seconds.
1) Fully depress the accelerator pedal.
2) Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the MIL starts

blinking.

IDX

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL) (Cont’d)

EC-91

4. Fully release the accelerator pedal.

ECM has entered to Diagnostic Test Mode II (Self-diagnostic results).

PBIB0092E

How to Set Diagnostic Test Mode II (Heated Oxygen Sensor 1 Monitor)

NHEC1189S0302

1. Set the ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to How to Set Diagnostic Test Mode

II (Self-diagnostic Results).

2. Start Engine.

ECM has entered to Diagnostic Test Mode II (Heated oxygen sensor 1 monitor).
ECM will start heated oxygen sensor 1 monitoring from the bank 1 sensor.

How to Set Diagnostic Switch Monitored Sensor from Bank 1 to Bank 2 or Vice versa

NHEC1189S0303

1. Fully depress the accelerator pedal quickly and then release it immediately.
2. Make sure that monitoring sensor has changed by MIL blinking as follows.

PBIB0093E

How to Erase Diagnostic Test Mode II (Self-diagnostic Results)

NHEC1189S0304

1. Set ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to How to Set Diagnostic Test Mode

II (Self-diagnostic Results).

2. Fully depress the accelerator pedal and keep it for more than 10 seconds. The emission-related diagnos-

tic information has been erased from the backup memory in the ECM.

3. Fully release the accelerator pedal, and confirm the DTC 0000 is displayed.

DIAGNOSTIC TEST MODE I — BULB CHECK

NHEC1189S04

In this mode, the MIL on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to
“WARNING LAMPS”, EL-150 or see DTC P0650 MIL (CIRCUIT), EC-444.

DIAGNOSTIC TEST MODE I — MALFUNCTION WARNING

NHEC1189S05

MIL

Condition

When the malfunction is detected or the ECM’s CPU is malfunctioning.

OFF

No malfunction.

These DTC numbers are clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS)

DIAGNOSTIC TEST MODE II — SELF-DIAGNOSTIC RESULTS

NHEC1189S06

In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MIL as shown below.
The DTC and 1st trip DTC are displayed at the same time. If the MIL does not illuminate in diagnostic test
mode I (Malfunction warning), all displayed items are 1st trip DTCs. If only one code is displayed when the

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL) (Cont’d)

EC-92

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