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Infiniti G35 (V35). Manual - part 12

ON BOARD DIAGNOSTIC (OBD) SYSTEM

AT-39

●

1st trip freeze frame data

●

System readiness test (SRT) codes

●

Test values

HOW TO ERASE DTC (WITH CONSULT-II)

●

If a DTC is displayed for both ECM and TCM, it is necessary to be erased for both ECM and TCM.

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.

Turn CONSULT-II ON and touch “A/T”.

Touch “SELF-DIAG RESULTS”.

Touch “ERASE”. (The DTC in the TCM will be erased.) Then touch “BACK” twice.

Touch “ENGINE”.

Touch “SELF-DIAG RESULTS”.

Touch “ERASE”. (The DTC in the ECM will be erased.)

SCIA5671E

AT-40

ON BOARD DIAGNOSTIC (OBD) SYSTEM

HOW TO ERASE DTC (WITH GST)

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.

Perform

AT-95, "TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)"

. (The engine warm-up step can

be skipped when performing the diagnosis only to erase the DTC.)

Select Mode 4 with GST (Generic Scan Tool). For details, refer to

EC-133, "Generic Scan Tool (GST)

Function"

HOW TO ERASE DTC (NO TOOLS)

The A/T CHECK indicator lamp is located on the instrument panel.

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.

Perform

AT-95, "TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)"

. (The engine warm-up step can

be skipped when performing the diagnosis only to erase the DTC.)

Perform “OBD-II SELF-DIAGNOSTIC PROCEDURE (No tools)”. Refer to

EC-61, "How to Erase DTC"

Malfunction Indicator Lamp (MIL)

NCS000BQ

DESCRIPTION

The MIL is located on the instrument panel.

The MIL will light up when the ignition switch is turned ON with-
out the engine running. This is a bulb check.

●

If the MIL does not light up, refer to

DI-21, "WARNING LAMPS"

or see

EC-683, "MIL AND DATA LINK CONNECTOR"

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

TROUBLE DIAGNOSIS

AT-41

TROUBLE DIAGNOSIS

PFP:00004

DTC Inspection Priority Chart

NCS000BR

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC “U1000CAN COMM CIRCUIT” is displayed with other DTCs, first perform the trouble diagnosis
for “DTC U1000 CAN COMMUNICATION LINE”. Refer to

AT-98

Fail-safe

NCS000BS

The TCM has an electrical fail-safe mode. This mode makes it possible to operate even if there is a an error in
a main electronic control input/output signal circuit.
In fail-safe mode, even if the selector lever is “D” or “M” mode, the A/T is fixed in 2nd, 4th or 5th (depending on
the breakdown position), so the customer should feel “slipping” or “poor acceleration”.
Even when the electronic circuits are normal, under special conditions (for example, when slamming on the
brake with the wheels spinning drastically and stopping the tire rotation), the A/T can go into fail-safe mode. If
this happens, switch OFF the ignition switch for 10 seconds, then switch it ON again to return to the normal
shift pattern. Therefore, the customer's vehicle has returned to normal, so handle according to the

AT-44,

"WORK FLOW"

FAIL-SAFE FUNCTION

If any malfunction occurs in a sensor or solenoid, this function controls the A/T to mark driving possible.

Vehicle Speed Sensor A/T (Revolution Sensor)

Signals are input from two systems - from vehicle speed sensor A/T (revolution sensor) installed on the A/T
and from combination meter so normal driving is possible even if there is a malfunction in one of the systems.
And if vehicle speed sensor A/T (revolution sensor) has unusual cases, 5th gear and manual mode are prohib-
ited.

Accelerator Pedal Position Sensor

Throttle Position Sensor

If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM according
to a pre-determined accelerator angle to make driving possible. And if there are malfunctions in tow systems,
the accelerator opening angle is controlled by the idle signal sent from the ECM which is based on input indi-
cating either idle condition or off-idle condition (pre-determined accelerator opening) in order to make driving
possible.

PNP Switch

In the unlikely event that a malfunction signal enters the TCM, the position indicator is switched OFF, the
starter relay is switched OFF (starter starting is disabled), the back-up lamp relay switched OFF (back-up lamp
is OFF) and the position is fixed to the “D” range to make driving possible.

Starter Relay

The starter relay is switched OFF. (Starter starting is disabled.)

Priority

Detected items (DTC)

U1000 CAN communication line

Except above

AT-42

TROUBLE DIAGNOSIS

A/T Interlock

●

If there is an A/T interlock judgment malfunction, the A/T is fixed in 2nd gear to make driving possible.

NOTE:
When the vehicle is driven fixed in 2nd gear, a turbine revolution sensor malfunction is displayed,
but this is not a turbine revolution sensor malfunction.

●

When the coupling pattern below is detected, the fail-safe action corresponding to the pattern is per-
formed.

A/T INTERLOCK COUPLING PATTERN TABLE

●

: NG X: OK

A/T 1st Engine Braking

When there is an A/T first gear engine brake judgment malfunction, the low coast brake solenoid is switched
OFF to avoid the engine brake operation.

Line Pressure Solenoid

The solenoid is switched OFF and the line pressure is set to the maximum hydraulic pressure to make driving
possible.

Torque Converter Clutch Solenoid

The solenoid is switched OFF to release the lock-up.

Low Coast Brake Solenoid

When a malfunction (electrical or functional) occurs, in order to make driving possible, if the solenoid is ON,
the A/T is held in 2nd gear; if the solenoid is OFF, the A/T is held in 4th gear. (engine brake is not applied in 1st
and 2nd gear.)

Input Clutch Solenoid

If a malfunction (electrical or functional) occurs with the solenoid either ON or OFF, the A/T is held in 4th gear
to make driving possible.

Direct Clutch Solenoid

If a malfunction (electrical or functional) occurs with the solenoid either ON or OFF, the A/T is held in 4th gear
to make driving possible.

Front Brake Solenoid

If a malfunction (electrical or functional) occurs with the solenoid ON, in order to make driving possible, the A/
T is held in 5th gear; if the solenoid is OFF, 4th gear.

High and Low Reverse Clutch Solenoid

If a malfunction (electrical or functional) occurs with the solenoid either ON or OFF, the A/T is held in 4th gear
to make driving possible.

Turbine Revolution Sensor 1 or 2

The control is the same as if there were no turbine revolution sensors, 5th gear and manual mode are prohib-
ited.

Gear position

ATF pressure switch output

Fail-safe

function

Clutch pressure output pattern after fail-safe func-

tion

SW3

(I/C)

SW6

(HLR/

SW5

(D/C)

SW1

(FR/B)

SW2

(LC/B)

I/C

HLR/C

D/C

FR/B

LC/B

L/U

A/T inter-
lock cou-
pling pattern

3rd

–

●

Held in

2nd gear

OFF

4th

–

●

Held in

2nd gear

OFF

5th

–

●

Held in

2nd gear

OFF

Content .. 10 11 12 13 ..