2005 INFINITI FX35 ignition

ON BOARD DIAGNOSTIC (OBD) SYSTEM AT-41
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Revision: 2005 July 2005 FX

1st trip diagnostic trouble codes (1st trip DTC)

Freeze frame data

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.
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. Turn CONSULT-II ON and touch “A/T”.
3. Touch “SELF-DIAG RESULTS”.
4. Touch “ERASE”. (The DTC in the TCM will be erased.) Then touch “BACK” twice.
5. Touch “ENGINE”.
6. Touch “SELF-DIAG RESULTS”.
7. Touch “ERASE”. (The DTC in the ECM will be erased.)
SCIA5671E

AT-42
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Revision: 2005 July 2005 FX
HOW TO ERASE DTC (WITH GST)
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 “TCM SELF-DIAGNOSTIC PROCEDURE (No Tools)”. Refer to AT-103, "
TCM SELF-DIAGNOS-
TIC PROCEDURE (NO TOOLS)" . (The engine warm-up step can be skipped when performing the diag-
nosis only to erase the DTC.)
3. Select Mode 4 with Generic Scan Tool (GST). For details, refer to EC-144, "
Generic Scan Tool (GST)
Function" (for VQ35DE) or EC-835, "Generic Scan Tool (GST) Function" (for VK45DE).
HOW TO ERASE DTC (NO TOOLS)
The A/T CHECK indicator lamp is located on the instrument panel.
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 “TCM SELF-DIAGNOSTIC PROCEDURE (No Tools)”. Refer to AT-103, "
TCM SELF-DIAGNOS-
TIC PROCEDURE (NO TOOLS)" . (The engine warm-up step can be skipped when performing the diag-
nosis only to erase the DTC.)
3. Perform “OBD-II SELF-DIAGNOSTIC PROCEDURE (No tools)”. Refer to EC-68, "
How to Erase DTC"
(for VQ35DE) or EC-758, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION" (for
VK45DE).
Malfunction Indicator Lamp (MIL)ACS002LR
DESCRIPTION
The MIL is located on the instrument panel.
1. 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-42, "WARNING LAMPS" ,
or see EC-703, "
MIL AND DATA LINK CONNECTOR" (for
VQ35DE) or EC-1393, "
MIL AND DATA LINK CONNECTOR"
(for VK45DE).
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

TROUBLE DIAGNOSIS AT-43
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Revision: 2005 July 2005 FX
TROUBLE DIAGNOSISPFP:00004
DTC Inspection Priority ChartACS002LS
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC U1000 is displayed with other DTCs, first perform the trouble diagnosis for DTC U1000. Refer to
AT- 1 0 6
.
Fail-safeACS002LT
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 transmission is fixed in 2nd, 4th or 5th
(depending on the breakdown position), so the customer should feel “slipping” or “poor acceleration”. When
fail-safe mode is triggered, when the ignition switch is switched “ON”, the A/T CHECK indicator lamp flashes
for about 8 seconds. (Refer to AT- 1 0 3 , "
TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)" ).
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 transmission 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. Also, the A/T CHECK indicator lamp flashes for about 8 seconds once, then is cleared.
Therefore, the customer's vehicle has returned to normal, so handle according to the “WORK FLOW” (Refer to
AT- 4 6
).
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

Signals are input from two systems - from vehicle speed sensor A/T (revolution sensor) installed on the
transmission 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 prohibited.
Accelerator Pedal Position Sensor

If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM accord-
ing to a pre-determined accelerator angle to make driving possible. And if there are malfunctions in tow
systems, the engine speed is fixed by ECM to a pre-determined engine speed to make driving possible.
Throttle Position Sensor

If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM accord-
ing 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 indicating 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” position to make driving possible.
Starter Relay

The starter relay is switched OFF. (Starter starting is disabled.)
Priority Detected items (DTC)
1 U1000 CAN communication line
2 Except above

AT-56
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
ROAD TEST
Description

The road test checks overall performance of the A/T and analyzes possible malfunction causes.

The road test is carried out in the following three stages.
1. Check before engine is started. Refer to AT- 5 6
.
2. Check at idle. Refer to AT- 5 7
.
3. Cruise test

Inspect all the items from Part 1 to Part 3. Refer to AT- 5 8 , AT- 6 0 , AT- 6 1 .

Before beginning the road test, check the test procedure and inspection items.

Test all inspection items until the symptom is uncovered. Diagnose NG items when all road tests are com-
plete.
Check Before Engine Is StartedACS002LZ
1. CHECK A/T CHECK INDICATOR LAMP
1. Park vehicle on level surface.
2. Move selector lever to “P” position.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
Does A/T CHECK indicator lamp light up for about 2 seconds?
YES >> GO TO 2.
NO >> Stop the road test and go to AT- 1 9 3 , "
A/T CHECK Indicator Lamp Does Not Come On" .
2. CHECK A/T CHECK INDICATOR LAMP
Does A/T CHECK indicator lamp flash for about 8 seconds?
YES >> For TCM fail-safe mode, perform self-diagnostics and record all NG items on the AT- 4 7 , "DIAG-
NOSTIC WORKSHEET" . Refer to AT- 9 3 , "SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "Diag-
nostic Procedure without CONSULT-II" .
NO >> 1. Turn ignition switch OFF.
2. Perform self-diagnostics and record all NG items on the AT- 4 7 , "
DIAGNOSTIC WORKSHEET"
. Refer to AT- 9 3 , "SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "Diagnostic Procedure with-
out CONSULT-II" .
3. Go to AT- 5 7 , "
Check at Idle" .
Stall speed Oil pressure does
not rise higher than
the oil pressure for
idle. Possible causes include a sensor malfunction or malfunction in the pressure adjustment function.
For example

Accelerator pedal position signal malfunction

TCM breakdown

Line pressure solenoid malfunction (shorting, sticking in ON state)

Pressure regulator valve or plug sticking

Pilot valve sticking or pilot filter clogged
The pressure rises,
but does not enter
the standard posi-
tion. Possible causes include malfunctions in the pressure supply system and malfunction in the pres-
sure adjustment function.
For example

Accelerator pedal position signal malfunction

Line pressure solenoid malfunction (sticking, filter clog)

Pressure regulator valve or plug sticking

Pilot valve sticking or pilot filter clogged
Only low for a spe-
cific position Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
Judgement Possible cause

TROUBLE DIAGNOSIS AT-57
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Revision: 2005 July 2005 FX
Check at IdleACS002M0
1. CHECK STARTING THE ENGINE
1. Park vehicle on level surface.
2. Move selector lever to “P” or “N” position.
3. Turn ignition switch OFF.
4. Start engine.
Does the engine start?
YES >> GO TO 2.
NO >> Stop the road test and go to AT- 1 9 4 , "
Engine Cannot Be Started in “P” or “N” Position" .
2. CHECK STARTING THE ENGINE
1. Turn ignition switch to ON.
2. Move selector lever in “D”, “M” or “R” position.
3. Start engine.
Does the engine start in each position?
YES >> Stop the road test and go to AT- 1 9 4 , "Engine Cannot Be Started in “P” or “N” Position" .
NO >> GO TO 3.
3. CHECK “P” POSITION FUNCTIONS
1. Move selector lever to “P” position.
2. Turn ignition switch OFF.
3. Disengage the parking brake.
4. Push the vehicle forward or backward.
5. Engage the parking brake.
When you push the vehicle with disengaging the parking brake, does it move?
YES >> Enter a check mark at “In “P” Position Vehicle Moves When Pushed” on the AT- 4 7 , "DIAGNOSTIC
WORKSHEET" , then continue the road test.
NO >> GO TO 4.
4. CHECK “N” POSITION FUNCTIONS
1. Start engine.
2. Move selector lever to “N” position.
3. Disengage the parking brake.
Does vehicle move forward or backward?
YES >> Enter a check mark at “In “N” Position Vehicle Moves” on the AT- 4 7 , "DIAGNOSTIC WORK-
SHEET" , then continue the road test.
NO >> GO TO 5.
5. CHECK SHIFT SHOCK
1. Engage the brake.
2. Move selector lever to “D” position.
When the transmission is shifted from
“N” to “D”, is there an excessive shock?
YES >> Enter a check mark at “Large Shock (“N” to “D” Position)” on the AT- 4 7 , "DIAGNOSTIC WORK-
SHEET" , then continue the road test.
NO >> GO TO 6.

AT-88
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
68
Others Engine does not start
in “N” or “P” position.
Refer to AT-194, "Engine Cannot Be
Started in “P” or “N”
Position" . ON vehicle
1. Ignition switch and starter
PG-3
,
SC-
10
2. Control linkage adjustment AT- 2 3 5
3. PNP switch AT- 11 4
69 Engine starts in posi-
tions other than “N” or
“P”. ON vehicle 1. Ignition switch and starter
PG-3
,
SC-
10
2. Control linkage adjustment AT- 2 3 5
3. PNP switch AT- 11 4
70 Engine stall. ON vehicle 1. A/T fluid level and state
AT- 5 2
2. Engine speed signalAT- 1 2 3
3. Turbine revolution sensorAT- 1 4 1
4. Torque converter clutch solenoid valveAT- 1 2 5
5. CAN communication lineAT- 1 0 6
6. Control valve with TCMAT- 2 4 3
OFF vehicle 7. Torque converter AT- 2 9 0
71 Engine stalls when
selector lever shifted
“N” → “D”, “R”. ON vehicle 1. A/T fluid level and state
AT- 5 2
2. Engine speed signalAT- 1 2 3
3. Turbine revolution sensorAT- 1 4 1
4. Torque converter clutch solenoid valveAT- 1 2 5
5. CAN communication lineAT- 1 0 6
6. Control valve with TCMAT- 2 4 3
OFF vehicle 7. Torque converter AT- 2 9 0
72 Engine speed does
not return to idle.
Refer to AT-221,
"Engine Speed Does
Not Return to Idle" . ON vehicle 1. A/T fluid level and state
AT- 5 2
2. ATF pressure switch 5 and direct clutch solenoid valve AT- 1 7 9,
AT- 1 5 8

3. ATF pressure switch 1 and front brake solenoid valve AT- 1 7 5
,
AT- 1 5 4
4. Accelerator pedal position sensor AT- 1 3 3
5. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 4 3
6. CAN communication line AT- 1 0 6
7. Control valve with TCMAT- 2 4 3
OFF vehicle 8. Front brake (brake band)
AT- 2 9 09. Direct clutchAT- 3 2 6
No. Items Symptom Condition Diagnostic Item Reference
page

AT-92
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
CONSULT-II SETTING PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.

For details, refer to the separate “CONSULT-II Operations Man-
ual”.
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector, which is located in instrument lower driver panel.
3. Turn ignition switch ON.
4. Touch “START (NISSAN BASED VHCL)”.
5. Touch “A/T”. If “A/T” is not indicated, go to GI-39, "
CONSULT-II Data Link
Connector (DLC) Circuit" .
6. Perform each diagnostic test mode according to each service procedure.
PBIB1503E
BCIA0029E
BCIA0030E
BCIA0031E

TROUBLE DIAGNOSIS AT-93
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Revision: 2005 July 2005 FX
SELF-DIAGNOSTIC RESULT MODE
After performing AT- 9 3 , "SELF-DIAGNOSTIC RESULT MODE" , place check marks for results on the AT- 4 7 ,
"DIAGNOSTIC WORKSHEET" . Reference pages are provided following the items.
Operation Procedure
1. Perform “CONSULT-II SETTING PROCEDURE”. Refer to AT- 9 2 , "CONSULT-II SETTING PROCEDURE"
.
2. Touch “SELF-DIAG RESULTS”. Display shows malfunction experienced since the last erasing
operation.
Display Items List
X: Applicable, —: Not applicable
BCIA0031E
Items (CONSULT-II
screen terms) Malfunction is detected when... TCM self-
diagnosis OBD-II
(DTC)
Reference page
“A/T” with
CONSULT- II MIL indica-
tor lamp*1, “ENGINE”
with CON- SULT-II or GST
CAN COMM CIR-
CUIT

When a malfunction is detected in CAN communications U1000 U1000 AT- 1 0 6
STARTER RELAY/
CIRC

If this signal is ON other than in “P” or “N” position, this is judged
to be a malfunction.
(And if it is OFF in “P” or “N” position, this too is judged to be a
malfunction.) P0615 —
AT- 1 0 9
TCM
TCM is malfunctioning P0700 P0700*3 AT- 11 3
PNP SW/CIRC

PNP switch 1-4 signals input with impossible pattern

“P” position is detected from “N” position without any other posi-
tion being detected in between. P0705 P0705
AT- 11 4
VEH SPD SEN/CIR
AT (Revolution
sensor)

Signal from vehicle speed sensor A/T (Revolution sensor) not
input due to cut line or the like

Unexpected signal input during running

After ignition switch is turned ON, unexpected signal input from
vehicle speed sensor MTR before the vehicle starts moving P0720 P0720
AT- 11 8
ENGINE SPEED
SIG
TCM does not receive the CAN communication signal from the
ECM. P0725 P0725*3
AT- 1 2 3
TCC SOLENOID/
CIRC
Normal voltage not applied to solenoid due to cut line, short, or
the like P0740 P0740
AT- 1 2 5
A/T TCC S/V
FNCTN
A/T cannot perform lock-up even if electrical circuit is good.

TCM detects as irregular by comparing difference value with slip
rotation. P0744 P0744*2
AT- 1 2 7
L/PRESS SOL/
CIRC

Normal voltage not applied to solenoid due to cut line, short, or
the like

TCM detects as irregular by comparing target value with monitor
value. P0745 P0745
AT- 1 2 9
TCM·RAM
TCM memory (RAM) is malfunctioning. P1702 — AT- 1 3 1