2008 INFINITI FX35 relay

TROUBLE DIAGNOSISAT-41
< SERVICE INFORMATION >
DE
F
G H
I
J
K L
M A
B
AT
N
O P
TROUBLE DIAGNOSIS
DTC Inspection Priority ChartINFOID:0000000001327148
If some DTCs are displayed at the same time, per form inspections one by one based on the following priority
chart.
NOTE:
If “DTC U1000” is displayed with other DTCs, fi rst perform the trouble diagnosis for “DTC U1000 CAN
COMMUNICATION”. Refer to AT- 9 4
.
Fail-SafeINFOID:0000000001327149
The TCM has an electrical fail-safe mode. This mode make s it possible to operate even if there is 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 s pecial conditions (for example, when slamming on the
brake with the wheels spinning drastically and stopping the ti re 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, t he customer's vehicle has returned to normal, so handle according to the
“WORK FLOW” (Refer to AT- 4 2
).
FAIL-SAFE FUNCTION
If any malfunction occurs in a sensor or solenoid, th is 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 sens or A/T (revolution sensor) has unus ual 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 po ssible. 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 po ssible. 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 t he TCM, the position indicator is switched OFF, the
starter relay is switched OFF (starter starting is di sabled), 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.)
A/T Interlock
 If there is an A/T interlock judgment malfunction, t he 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 r evolution sensor malfunction.
 When the coupling pattern below is detected, the fail- safe action corresponding to the pattern is performed.
A/T 1st Engine Braking
Priority Detected items (DTC)
1 U1000 CAN communication line
2 Except above
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

AT-84
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Data are reference value and are measured between each terminal and ground.
CONSULT-III Function (TRANSMISSION)INFOID:0000000001327163
CONSULT-III can display each diagnostic item us ing the diagnostic test models shown following.
FUNCTION
CONSULT-III REFERENCE VALUE
NOTICE:
1. The CONSULT-III electrically displays shift timi ng and lock-up timing (that is, operation timing of each
solenoid).
Check for time difference between actual shift timi ng and the CONSULT-III display. If the difference is
noticeable, mechanical parts (except solenoids, sens ors, etc.) may be malfunctioning. Check mechanical
parts using applicable diagnostic procedures.
2. Shift schedule (which implies gear position) display ed on CONSULT-III and that indicated in Service Man-
ual may differ slightly. This occurs because of the following reasons:
- Actual shift schedule has more or less tolerance or allowance,
- Shift schedule indicated in Service Manual refers to the point where shifts start, and
- Gear position displayed on CONSULT-III indicates the point where shifts are completed.
Te r m i n a l Wire
color Item Condition Data (Approx.)
1LG Power supply
(Memory back-up) Always Battery voltage
2LG Power supply
(Memory back-up)
Always Battery voltage
3 L CAN-H – –
4PU K-line (CONSULT-
III signal) The terminal is connected to the data link connector for CONSULT-III. –
5 B Ground – –
6YPower supply – Battery voltage
–0 V
7OR Back-up lamp re-
lay Selector lever in “R” position. 0 V
Selector lever in other positions. Battery voltage
8 P CAN-L – –
9 GY Starter relay Selector lever in “N” and “P
” positions. Battery voltage
Selector lever in other positions. 0 V
10 B Ground – –
Diagnostic test mode Function
Work support This mode enables a technician to adjust some devices faster and more accurately by following the in-
dications on CONSULT-III.
Self-diagnostic results Self-diagnostic results can be read and erased quickly.
Data monitor Input/Output data in the ECU can be read.
CAN diagnostic support mon-
itor The results of transmit/receive diagnosis of CAN communication can be read.
Function test Performed by CONSULT-III instead of a technician to determine whether each system is “OK” or “NG”.
DTC work support Select the operating condition to confirm Diagnosis Trouble Codes.
ECU part number TCM part number can be read.
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

TROUBLE DIAGNOSISAT-85
< SERVICE INFORMATION >
DE
F
G H
I
J
K L
M A
B
AT
N
O P
3. Display of solenoid valves on CONSULT-III changes at t he start of shifting, while gear position is displayed
upon completion of shifting (which is computed by TCM).
Item name Condition Display value (Approx.)
ATF TEMP SE 1 0°C (32 °F) − 20 °C (68 °F) − 80 °C (176 °F) 3.3
− 2.7 − 0.9 V
ATF TEMP SE 2 3.3 − 2.5 − 0.7 V
ATF TEMP 1 Ignition switch ON Measured ATF temperature is dis-
played.
TCC SOLENOID Lock-up is active 0.4 − 0.6 A
SLCT LVR POSI Selector lever in “N
” and “P” positions. N/P
Selector lever in “R” position. R
Selector lever in “D” position. D
VHCL/S SE-A/T During driving Approximately matches the speedom-
eter reading.
VEHICLE SPEED During driving Approximately matches the speedom-
eter reading.
ENGINE SPEED Engine running Closely matches the tachometer read-
ing.
LINE PRES SOL During driving 0.2 − 0.6 A
TURBINE REV During driving (lock-up ON) Approximately matches the engine
speed.
VHCL/S SE-MTR During driving Approximately matches the speedom-
eter reading.
ATF PRES SW 2 Low coast brake engaged. Refer to
AT- 1 8
.ON
Low coast brake disengaged. Refer to AT- 1 8
. OFF
I/C SOLENOID Input clutch disengaged. Refer to
AT- 1 8
.0.6 − 0.8 A
Input clutch engaged. Refer to AT- 1 8
.0 − 0.05 A
FR/B SOLENOID Front brake engaged. Refer to
AT- 1 8
.0.6 − 0.8 A
Front brake disengaged. Refer to AT- 1 8
. 0 − 0.05 A
D/C SOLENOID Direct clutch disengaged. Refer to
AT- 1 8
.0.6 − 0.8 A
Direct clutch engaged. Refer to AT- 1 8
.0 − 0.05 A
HLR/C SOL High and low reverse clutch disengaged. Refer to
AT- 1 8
.0.6 − 0.8 A
High and low reverse clutch engaged. Refer to AT- 1 8
.0 − 0.05 A
ON OFF SOL Low coast brake engaged. Refer to
AT- 1 8
.ON
Low coast brake disengaged. Refer to AT- 1 8
.OFF
MANU MODE SW Manual shift gate position (neutral) ON
Other than the above OFF
NON M-MODE SW Manual shift gate position OFF
Other than the above ON
UP SW LEVER Selector lever: + side ON
Other than the above OFF
DOWN SW LEVER Selector lever: - side ON
Other than the above OFF
STARTER RELAY Selector lever in “N
” and “P” positions. ON
Selector lever in other positions. OFF
ACCELE POSI Released accelerator pedal. 0.0/8
Fully depressed accelerator pedal. 8.0/8
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

AT-86
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
SELF-DIAGNOSTIC RESULT MODE
After performing “SELF-DIAGNOSTIC RESULT MODE”, place check marks for results on the AT-42, "How to
Perform Trouble Diagnosis for Quick and Accurate Repair". Reference pages are provided following the items.
Display Items List
X: Applicable, —: Not applicable
CLSD THL POSReleased accelerator pedal. ON
Fully depressed accelerator pedal. OFF
W/O THL POS Fully depressed accelerator pedal. ON
Released accelerator pedal. OFF
BRAKE SW Depressed brake pedal. ON.
Released brake pedal. OFF
GEAR During driving. 1,2,3,4,5, Item name Condition Display value (Approx.)
Items (CONSULT-
III screen terms) Malfunction is detected when... TCM self-di-
agnosis OBD-II
(DTC)
Reference page
“TRANS-
MISSION”
with CON- SULT-III MIL indica-
tor lamp(*1),
“ENGINE”
with CON-
SULT-III or GST
CAN COMM CIR-
CUIT When TCM is not transmitting or receiving CAN communication sig-
nal for 2 seconds or more.
U1000 U1000
AT- 9 4
STARTER RELAY/
CIRCIf 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 mal-
function.)
P0615 —
AT- 9 7
TCM TCM is malfunctioning. P0700 P0700 AT- 1 0 1
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- 1 0 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- 1 0 6
VEH SPD SEN/CIR
AT  Signal from vehicle speed sensor A/T (Revolution sensor) not in-
put 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- 1 0 8
ENGINE SPEED
SIGTCM does not receive the CAN communication signal from the
ECM.
P0725 P0725
AT- 11 2
A/T 1ST GR
FNCTNA/T cannot shift to 1st gear. P0731 P0731
AT- 11 4
A/T 2ND GR
FNCTNA/T cannot shift to 2nd gear. P0732 P0732
AT- 11 6
A/T 3RD GR
FNCTNA/T cannot shift to 3rd gear. P0733 P0733
AT- 11 8
A/T 4TH GR
FNCTNA/T cannot shift to 4th gear. P0734 P0734
AT- 1 2 0
A/T 5TH GR
FNCTNA/T cannot shift to 5th gear. P0735 P0735
AT- 1 2 2
TCC SOLENOID/
CIRCNormal voltage not applied to solenoid due to cut line, short, or the
like.
P0740 P0740
AT- 1 2 4
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

AT-90
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
R POSI IND (ON/OFF) — —
N POSI IND (ON/OFF) — —
D POSI IND (ON/OFF) — —
4TH POSI IND (ON/OFF) — —
3RD POSI IND (ON/OFF) — —
2ND POSI IND (ON/OFF) — —
1ST POSI IND (ON/OFF) — —
MANU MODE IND (ON/OFF) — —
POWER M LAMP (ON/OFF) — —
F-SAFE IND/L (ON/OFF) — —
ATF WARN LAMP (ON/OFF) — — Not mounted but displayed
BACK-UP LAMP (ON/OFF) — —
STARTER RELAY (ON/OFF) — —
PNP SW3 MON (ON/OFF) — —
C/V CLB ID1 — —
C/V CLB ID2 — —
C/V CLB ID3 — —
UNIT CLB ID1 — —
UNIT CLB ID2 — —
UNIT CLB ID3 — —
TRGT GR RATIO — —
TRGT PRES TCC (kPa) — —
TRGT PRES L/P (kPa) — —
TRGT PRES I/C (kPa) — —
TRGT PRE FR/B (kPa) — —
TRGT PRES D/C (kPa) — —
TRG PRE HLR/C (kPa) — —
SHIFT PATTERN — —
DRV CST JUDGE — —
START RLY MON — —
NEXT GR POSI — —
SHIFT MODE — —
MANU GR POSI — —
VEHICLE SPEED (km/h) — X Vehicle sp eed recognized by the TCM.
Monitored item (Unit)
Select Monitor Item
Remarks
ECU IN-
PUT SIG- NALS MAIN SIG-
NALS SELEC-
TION
FROM
MENU
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DTC P0615 START SIGNAL CIRCUITAT-97
< SERVICE INFORMATION >
DE
F
G H
I
J
K L
M A
B
AT
N
O P
DTC P0615 START SIGNAL CIRCUIT
DescriptionINFOID:0000000001327171
TCM prohibits cranking other than at “P” or “N” position.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001327172
On Board Diagnosis LogicINFOID:0000000001327173
Diagnostic trouble code “P0615 STARTER RELAY/CIRC” wit h CONSULT-III or 14th judgement flicker without
CONSULT-III is detected when starter relay is switc hed ON other than at “P” or “N” position. (Or when
switched OFF at “P” or “N” position).
Possible CauseINFOID:0000000001327174
 Harness or connectors (Starter relay and TCM circuit is open or shorted.)
 Starter relay circuit
DTC Confirmation ProcedureINFOID:0000000001327175
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, alw ays 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-III
1. Turn ignition switch ON.
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III
and check monitor “STARTER RELAY” ON/OFF.
3. Start engine.
4. Drive vehicle for at least 2 consecutive seconds.
5. If DTC is detected, go to AT-99, "
Diagnosis Procedure".
Item name Condition Display value
STARTER RELAY Selector lever in “N
” and “P” positions. ON
Selector lever in other positions. OFF
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

AT-98
< SERVICE INFORMATION >
DTC P0615 START SIGNAL CIRCUIT
Wiring Diagram - AT - STSIG
INFOID:0000000001327176
TCM terminals and data are re ference value. Measured betwe en each terminal and ground.
TCWM0247E
Te r m i n a lWire
color Item Condition Data (Approx.)
9 GY Starter relay Selector lever in “N” and “P
” positions. Battery voltage
Selector lever in other positions. 0 V
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DTC P0615 START SIGNAL CIRCUITAT-99
< SERVICE INFORMATION >
DE
F
G H
I
J
K L
M A
B
AT
N
O P
Diagnosis ProcedureINFOID:0000000001327177
1.CHECK STARTER RELAY
With CONSULT-III
1. Turn ignition switch ON.
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III
and check monitor “STARTER RELAY” ON/OFF.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check voltage between the IPDM E/R connector and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2. CHECK HARNESS BETWEEN A/T ASSEMBLY HA RNESS CONNECTOR AND IPDM E/R CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect A/T assembly harness connector and IPDM E/R connector.
3. Check continuity between A/T assembly harness connector and IPDM E/R connector.
4. If OK, check harness for short to ground and short to power.
5. Reinstall any part removed.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK TERMINAL CORD ASSEMBLY
1. Remove control valve with TCM. Refer to AT-215, "
Control Valve with TCM and A/T Fluid Temperature
Sensor 2".
2. Disconnect A/T assembly harness connector and TCM connector.
Item name Condition Display value
STARTER RELAY Selector lever in “N
” and “P” positions. ON
Selector lever in other positions. OFF
Name Connector Terminal Shift position Voltage (Approx.)
Starter re-
lay E9 53 - Ground “N” and “P” Battery voltage
“R” and “D” 0 V
SCIA2103E
Item Connector Terminal Continuity
A/T assembly harness con-
nector F44 9
Ye s
IPDM E/R connector E9 53
SCIA5439E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C