2006 INFINITI FX35 ignition switch

ON BOARD DIAGNOSTIC (OBD) SYSTEM AT-43
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2006 December 2006 FX35/FX45
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- 1 0 2 , "
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-130, "
Generic Scan Tool (GST)
Function" (for VQ35DE) or EC-792, "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- 1 0 2 , "
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-67, "
How to Erase DTC"
(for VQ35DE) or EC-727, "How to Erase DTC" (for VK45DE).
Malfunction Indicator Lamp (MIL)NCS001BB
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-38, "WARNING LAMPS" ,
or see EC-672, "
MIL AND DATA LINK CONNECTOR" (for
VQ35DE) or EC-1360, "
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

AT-44
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
TROUBLE DIAGNOSISPFP:00004
DTC Inspection Priority ChartNCS001BC
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 CAN
COMMUNICATION. Refer to AT- 1 0 4
.
Fail-safeNCS001BD
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”.
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. Therefore, the customer's vehicle has returned to normal, so handle according to the
“WORK FLOW” (Refer to AT- 4 7
).
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 trans-
mission 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 according
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 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” 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

TROUBLE DIAGNOSIS AT-57
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2006 December 2006 FX35/FX45
Check Before Engine Is StartedNCS001BI
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 >> 1. Turn ignition switch OFF. 2. Perform self-diagnostics and record all NG items on the AT- 4 8 , "
DIAGNOSTIC WORKSHEET"
. Refer to AT- 9 2 , "SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 2 , "Diagnostic Procedure with-
out CONSULT-II" .
3. Go to AT- 5 7 , "
Check at Idle" .
NO >> Stop the road test and go to AT- 1 8 9 , "
A/T CHECK Indicator Lamp Does Not Come On" .
Check at IdleNCS001BJ
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 0 , "
Engine Cannot Be Started in “P” or “N” Position" .
2. CHECK STARTING THE ENGINE
1. Turn ignition switch ON. (Do not start engine.)
2. Move selector lever to “D”, “M” or “R” position.
3. Start engine.
Does the engine start in either position?
YES >> Stop the road test and go to AT- 1 9 0 , "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 AT- 1 9 1 , "In “P” Position, Vehicle Moves When Pushed" on the AT- 4 8 ,
"DIAGNOSTIC WORKSHEET" , then continue the road test.
NO >> GO TO 4.

AT-88
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
68 Others Engine does not start
in “N” or “P” position.
Refer to AT-190, "Engine Cannot Be
Started in “P” or “N”
Position" . ON vehicle
1. Ignition switch and starter
PG-3
,
SC-
8
2. Control linkage adjustment AT- 2 3 1
3. PNP switch AT- 11 2
69 Engine starts in posi-
tions other than “N” or
“P”. ON vehicle 1. Ignition switch and starter
PG-3
,
SC-
8
2. Control linkage adjustment AT- 2 3 1
3. PNP switch AT- 11 2
70 Engine stall. ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Engine speed signalAT- 1 2 3
3. Turbine revolution sensor AT- 11 6
4. Torque converter clutch solenoid valveAT- 1 2 5
5. CAN communication lineAT- 1 0 4
6. Control valve with TCMAT- 2 3 9
OFF vehicle 7. Torque converter AT- 2 9 4
71 Engine stalls when
selector lever shifted
“N” → “D”, “R”. ON vehicle 1. A/T fluid level and state
AT- 5 3
2. Engine speed signalAT- 1 2 3
3. Turbine revolution sensor AT- 11 6
4. Torque converter clutch solenoid valveAT- 1 2 5
5. CAN communication lineAT- 1 0 4
6. Control valve with TCMAT- 2 3 9
OFF vehicle 7. Torque converter AT- 2 9 4
72 Engine speed does
not return to idle.
Refer to AT-217,
"Engine Speed Does
Not Return to Idle" . ON vehicle 1. A/T fluid level and state
AT- 5 3
2. ATF pressure switch 5 and direct clutch solenoid valve AT- 1 7 5,
AT- 1 5 4

3. ATF pressure switch 1 and front brake solenoid valve AT- 1 7 1
,
AT- 1 5 0
4. Accelerator pedal position sensor AT- 1 3 1
5. Vehicle speed sensor A/T and vehicle speed sensor MTR AT- 11 8,
AT- 1 3 9
6. CAN communication line AT- 1 0 4
7. Control valve with TCMAT- 2 3 9
OFF vehicle 8. Front brake (brake band)
AT- 2 9 49. Direct clutchAT- 3 3 2
No. Items Symptom Condition Diagnostic Item Reference
page

AT-92
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
CONSULT-II SETTING PROCEDURE
Refer to GI-38, "CONSULT-II Start Procedure" .
SELF-DIAGNOSTIC RESULT MODE
After performing AT- 9 2 , "SELF-DIAGNOSTIC RESULT MODE" , place check marks for results on the AT- 4 8 ,
"DIAGNOSTIC WORKSHEET" . Reference pages are provided following the items.
Operation Procedure
Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.
Display shows malfunction experienced since the last erasing opera-
tion.
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-104
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-107
TCM
TCM is malfunctioning P0700 P0700 AT- 111
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 2
TURBINE REV S/
CIRC
TCM does not receive the proper voltage signal from the sensor.

TCM detects an irregularity only at position of 4th gear for turbine
revolution sensor 2. P0717 P0717
AT- 11 6
VEH SPD SEN/CIR
AT

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 —
AT-123
TCC SOLENOID/
CIRC
Normal voltage not applied to solenoid due to cut line, short, or
the like P0740 P0740
AT-125
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-127

AT-102
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
Diagnostic Procedure without CONSULT-IINCS001BS
OBD-II SELF-DIAGNOSTIC PROCEDURE (WITH GST)
Refer to EC-130, "Generic Scan Tool (GST) Function" (for VQ35DE) or EC-792, "Generic Scan Tool (GST)
Function" (for VK45DE).
OBD-II SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)
Refer to EC-68, "Malfunction Indicator Lamp (MIL)" (for VQ35DE) or EC-729, "Malfunction Indicator Lamp
(MIL)" (for VK45DE).
TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)
Description
When the ignition switch is turned ON, the indicator lamp lights up for 2 seconds. As a method for locating the
suspect circuit, when the self-diagnostics start signal is input, the memory for the malfunction location is output
and the A/T CHECK indicator lamp flashes to display the corresponding DTC.
Diagnostic Procedure
1. CHECK A/T CHECK INDICATOR LAMP
1. Start the engine with selector lever in “P” position. Warm engine to normal operating temperature.
2. Turn ignition switch ON and OFF at least twice, then leave it in the OFF position.
3. Wait 10 seconds.
4. Turn ignition switch ON. (Do not start engine.)
Does A/T CHECK indicator lamp come on for about 2 seconds?
YES >> GO TO 2.
NO >> Go to AT- 1 8 9 , "
A/T CHECK Indicator Lamp Does Not Come On" .
2. JUDGEMENT PROCEDURE
1. Turn ignition switch OFF.
2. Keep pressing shift lock release button.
3. Move selector lever from “P” to “D” position.
4. Release accelerator pedal. (Set the closed throttle position signal ON.)
5. Depress brake pedal. (Stop lamp switch signal ON.)
6. Turn ignition switch ON. (Do not start engine.)
7. Wait 3 seconds.
8. Move the selector lever to the manual shift gate side. (Manual mode signal ON.)
9. Release brake pedal. (Stop lamp switch signal OFF.)
10. Move the selector lever to “D” position. (Manual mode signal OFF.)
11. Depress brake pedal. (Stop lamp switch signal ON.)
12. Release brake pedal. (Stop lamp switch signal OFF.)
13. Depress accelerator pedal fully and release it.
>> GO TO 3.
3. CHECK SELF-DIAGNOSIS CODE
Check A/T CHECK indicator lamp. Refer to AT- 1 0 3 , "
Judgement Self-diagnosis Code" .
If the system does not go into self-diagnostics. Refer to AT- 11 2 , "
DTC P0705 PARK/NEUTRAL POSITION
SWITCH" , AT- 1 6 6 , "DTC P1815 MANUAL MODE SWITCH" , AT- 1 8 3 , "CLOSED THROTTLE POSITION AND
WIDE OPEN THROTTLE POSITION CIRCUIT" , AT- 1 8 4 , "BRAKE SIGNAL CIRCUIT" .
>> DIAGNOSIS END

TROUBLE DIAGNOSIS AT-103
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2006 December 2006 FX35/FX45
Judgement Self-diagnosis Code
If there is a malfunction, the lamp lights up for the time corresponding to the suspect circuit.
Erase Self-diagnosis

In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is
stored into the control unit as necessary during use by the user. This memory is not erased no matter how
many times the ignition switch is turned ON and OFF.

However, this information is erased by turning ignition switch “OFF” after performing self-diagnostics or by
erasing the memory using the CONSULT-II.
No. Malfunctioning item No. Malfunctioning item
1 Revolution sensor AT- 11 8
10 A/T fluid temperature sensor AT- 1 3 4
2 Direct clutch solenoid valve AT-154 , AT-15611 Turbine revolution sensor AT- 11 6
3 Torque converter clutch solenoid valve AT-125 , AT- 1 2 712 A/T interlock AT- 1 4 1
4 Line pressure solenoid valve AT-12913 A/T 1st engine braking AT-144
5 Input clutch solenoid valve AT- 1 4 6 , AT- 1 4 814 Start signal AT-107
6 Front brake solenoid valve AT- 1 5 0 , AT- 1 5 215 Accelerator pedal position sensor AT- 1 3 1
7 Low coast brake solenoid valve AT- 1 6 2 , AT- 1 6 416 Engine speed signal AT- 1 2 3
8 High and low reverse clutch solenoid valve AT- 1 5 8 , AT- 1 6 017 CAN communication line AT- 1 0 4
9 PNP switch AT- 11 2
SCIA5767E

AT-104
DTC U1000 CAN COMMUNICATION LINE
Revision: 2006 December 2006 FX35/FX45
DTC U1000 CAN COMMUNICATION LINEPFP:23710
DescriptionNCS001BT
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicle, and each control unit shares information and links
with other control units during operation (not independent). In CAN communication, control units are con-
nected with 2 communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission
with less wiring. Each control unit transmits/receives data but selectively reads required data only.
On Board Diagnosis LogicNCS001BU

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “U1000 CAN COMM CIRCUIT” with CONSULT-II or 17th judgement flicker with-
out CONSULT-II is detected when TCM cannot communicate to other control units.
Possible CauseNCS001BV
Harness or connectors
(CAN communication line is open or shorted.)
DTC Confirmation ProcedureNCS001BW
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine and wait for at least 6 seconds.
4. If DTC is detected, go to AT- 1 0 6 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
BCIA0031E