ECU INFINITI FX35 2005 Owner's Manual

AT-98
TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
MANU MODE SW (ON-OFF) X —
NON M-MODE SW (ON-OFF) X —
UP SW LEVER (ON-OFF) X —
DOWN SW LEVER (ON-OFF) X —
SFT UP ST SW (ON-OFF) — — Not mounted but displayed.
SFT DWN ST SW (ON-OFF) — —
ASCD·OD CUT (ON-OFF) — —
ASCD·CRUISE (ON-OFF) — —
ABS SIGNAL (ON-OFF) — —
ACC OD CUT (ON-OFF) — — ICC (intelligent cruise control)
ACC SIGNAL (ON-OFF) — —
TCS GR/P KEEP (ON-OFF) — —
TCS SIGNAL 2 (ON-OFF) — —
TCS SIGNAL 1 (ON-OFF) — —
TCC SOLENOID (A) — X
LINE PRES SOL (A) — X
I/C SOLENOID (A) — X
FR/B SOLENOID (A) — X
D/C SOLENOID (A) — X
HLR/C SOL (A) — X
ON OFF SOL (ON-OFF) — — LC/B solenoid
TCC SOL MON (A) — —
L/P SOL MON (A) — —
I/C SL MON (A) — —
FR/B SOL MON (A) — —
D/C SOL MON (A) — —
HLR/C SOL MON (A) — —
ON OFF SOL MON (ON-OFF) — — LC/B solenoid
P POSI IND (ON-OFF) — —
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) — — Monitored item (Unit)
Select Monitor Item
Remarks
ECU
INPUT
SIGNALS MAIN SIG-
NALS SELEC-
TION
FROM
MENU

TROUBLE DIAGNOSIS AT-99
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Revision: 2005 July 2005 FX
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 speed recognized by the TCM.
Voltage (V) — — Displays the value measured by the voltage
probe.
Frequency (Hz) — —
The value measured by the pulse probe is dis-
played.
DUTY-HI (high) (%) — —
DUTY-LOW (low) (%) — —
PLS WIDTH-HI (ms) — —
PLS WIDTH-LOW (ms) — — Monitored item (Unit)
Select Monitor Item
Remarks
ECU
INPUT
SIGNALS MAIN SIG-
NALS SELEC-
TION
FROM
MENU

DTC P0615 START SIGNAL CIRCUIT AT-109
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Revision: 2005 July 2005 FX
DTC P0615 START SIGNAL CIRCUITPFP:25230
DescriptionACS003LO

TCM prohibits cranking other than at “P” or “N” position.
CONSULT-II Reference ValueACS003K2
On Board Diagnosis LogicACS002MH

This is not an OBD-II self-diagnostic item.

Diagnostic trouble code “P0615 STARTER RELAY/CIRC” with CONSULT-II or 14th judgement flicker
without CONSULT-II is detected when starter relay is switched ON other than at “P” or “N” position. (Or
when switched OFF at “P” or “N” position).
Possible CauseACS003LP

Harness or connectors
[Starter relay and TCM circuit is open or shorted.]

Starter relay circuit
DTC Confirmation ProcedureACS002MJ
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. (Do not start engine.)
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode for “A/T” with CONSULT-II 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- 111 , "
Diagnostic Procedure" .
Item name Condition Display value
STARTER RELAY Selector lever in “N” and “P” positions. ON
Selector lever in other positions. OFF
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DTC P0700 TCM AT-113
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Revision: 2005 July 2005 FX
DTC P0700 TCMPFP:31036
DescriptionACS006DU
The TCM consists of a microcomputer and connectors for signal input and output and for power supply. The
TCM controls the A/T.
On Board Diagnosis LogicACS006DV

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0700* TCM” with CONSULT-II is detected when TCM is malfunctioning.
*: For VQ35DE engine.
Possible CauseACS006DW
TCM.
DTC Confirmation ProcedureACS006DX
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. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine.
4. Run engine for at least 2 consecutive seconds at idle speed.
5. If DTC is detected, go to AT- 11 3 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Diagnostic ProcedureACS006DY
1. CHECK DTC
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF DIAG RESULTS” mode for “A/T” with CONSULT-II.
3. Touch “ERASE”.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Perform DTC confirmation procedure, AT- 11 3 , "
DTC Confirmation Procedure" .
Is the
“P0700 TCM” displayed again?
YES >> Replace the control valve with TCM. Refer to AT- 2 4 3 , "Control Valve with TCM and A/T Fluid Tem-
perature Sensor 2" .
NO >> INSPECTION END
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AT-114
DTC P0705 PARK/NEUTRAL POSITION SWITCH
Revision: 2005 July 2005 FX
DTC P0705 PARK/NEUTRAL POSITION SWITCHPFP:32006
DescriptionACS002ML

The park/neutral position (PNP) switch includes a transmission range switch.

The transmission range switch detects the selector lever position and sends a signal to the TCM.
CONSULT-II Reference ValueACS003K3
On Board Diagnosis LogicACS002MM

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0705 PNP SW/CIRC” with CONSULT-II or 9th judgement flicker without CON-
SULT-II is detected under the following conditions.
–When TCM does not receive the correct voltage signal from the PNP switches 1, 2, 3 and 4 based on the
gear position.
–When no other position but “P” position is detected from “N” position.
Possible CauseACS002MN

Harness or connectors
[Park/neutral position (PNP) switches 1, 2, 3 and 4 and TCM circuit is open or shorted.]

Park/neutral position (PNP) switches 1, 2, 3 and 4
DTC Confirmation ProcedureACS002MO
CAUTION:
Always drive vehicle at a safe speed.
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. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” or “MAIN SHIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.
THRTL POS SEN: More than 1.2V
5. If DTC is detected, go to AT- 11 6 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value
SLCT LVR POSI Selector lever in “N” and “P” positions. N/P
Selector lever in “R” position. R
Selector lever in “D” position. D
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AT-118
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
Revision: 2005 July 2005 FX
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)PFP:32702
DescriptionACS002MQ
The revolution sensor detects the revolution of the idler gear parking pawl lock gear and emits a pulse signal.
The pulse signal is sent to the TCM which converts it into vehicle speed.
CONSULT-II Reference ValueACS003K4
On Board Diagnosis LogicACS002MR

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0720 VEH SPD SEN/CIR AT” with CONSULT-II or 1st judgement flicker without
CONSULT-II is detected under the following conditions.
–When TCM does not receive the proper voltage signal from the sensor.
–After ignition switch is turned ON, irregular signal input from vehicle speed sensor MTR before the vehicle
starts moving.
Possible CauseACS002MS

Harness or connectors
(Sensor circuit is open or shorted.)

Revolution sensor

Vehicle speed sensor MTR
DTC Confirmation ProcedureACS002MT
CAUTION:

Always drive vehicle at a safe speed.

Be careful not to rev engine into the red zone on the tachometer.
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. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Touch “START”.
4. Drive vehicle and check for an increase of “VHCL/S SE·A/T” value in response to “VHCL/S SE·MTR” value.
If the check result is NG, go to AT- 1 2 1 , "
Diagnostic Procedure" .
If the check result is OK, go to following step.
5. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
6. Start engine and maintain the following conditions for at least 5 consecutive seconds.
VHCL SPEED SE: 30 km/h (19 MPH) or more
THRTL POS SEN: More than 1.0/8
Selector lever: “D” position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
If the check result is NG, go to AT- 1 2 1 , "
Diagnostic Procedure" .
If the check result is OK, go to following step.
7. Maintain the following conditions for at least 5 consecutive seconds. ENGINE SPEED: 3,500 rpm or more
THRTL POS SEN: More than 1.0/8
Selector lever: “D” position
Item name Condition Display value (km/h)
VHCL/S SE·A/T During driving Approximately matches the speedometer reading.
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DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR) AT-121
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Revision: 2005 July 2005 FX
Diagnostic ProcedureACS002MU
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine.
4. Read out the value of “VHCL/S SE·A/T” while driving. Check the value changes according to driving speed.
OK or NG
OK >> GO TO 6.
NG >> GO TO 2.
2. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT- 1 8 3 , "
MAIN POWER SUPPLY AND GROUND CIR-
CUIT" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. DETECT MALFUNCTIONING ITEM
Check the following.

The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
Item name Condition Display value (km/h)
VHCL/S SE·A/T During driving Approximately matches
the speedometer reading.
SCIA2148E

DTC P0725 ENGINE SPEED SIGNAL AT-123
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Revision: 2005 July 2005 FX
DTC P0725 ENGINE SPEED SIGNALPFP:24825
DescriptionACS002MV
The engine speed signal is sent from the ECM to the TCM.
CONSULT-II Reference ValueACS003K5
On Board Diagnosis LogicACS002MW

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0725* ENGINE SPEED SIG” with CONSULT-II or 16th judgement flicker with-
out CONSULT-II is detected when TCM does not receive the ignition signal from ECM during engine
cranking or running.
*: For VQ35DE engine.
Possible CauseACS002MX

Harness or connectors
(ECM to TCM circuit is open or shorted.)
DTC Confirmation ProcedureACS002MY
CAUTION:
Always drive vehicle at a safe speed.
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. (Do not start engine.)
2. Select “MAIN SIGNALS“ in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine and maintain the following conditions for at least 10 consecutive seconds.
VHCL SPEED SE: 10 km/h (6 MPH) or more
ACCELE POSI: More than 1.0/8
Selector lever: “D” position
4. If DTC is detected, go to AT- 1 2 4 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value (rpm)
ENGINE SPEED Engine running Closely matches the tachometer reading.
BCIA0031E

AT-124
DTC P0725 ENGINE SPEED SIGNAL
Revision: 2005 July 2005 FX
Diagnostic ProcedureACS002MZ
1. CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to AT- 9 3 , "
SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "Diagnostic Pro-
cedure without CONSULT-II" .
Is a malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to AT- 1 0 6 , "DTC U1000 CAN COMMUNICATION LINE" .
NO >> GO TO 2.
2. CHECK DTC WITH TCM
With CONSULT-II
1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. While monitoring engine speed, check for engine speed change corresponding to wide-open throttle position signal.
With GST
Follow the procedure “WITH CONSULT-II”.
OK or NG
OK >> GO TO 3.
NG >> Check the ignition signal circuit.

Refer to EC-648, "IGNITION SIGNAL" (for VQ35DE) or EC-1339, "IGNITION SIGNAL" (for
VK45DE).
3. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT- 1 2 3 , "DTC Confirmation Procedure" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 4.
4. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT- 1 8 3 , "
MAIN POWER SUPPLY AND GROUND CIR-
CUIT" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. DETECT MALFUNCTIONING ITEM
Check the following.

The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK >> Replace the control valve with TCM. Refer to AT- 2 4 3 , "Control Valve with TCM and A/T Fluid Tem-
perature Sensor 2" .
NG >> Repair or replace damaged parts.
Item name Condition Display value (rpm)
ENGINE SPEED Engine running Closely matches the
tachometer reading.
PCIA0041E

DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE AT-125
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Revision: 2005 July 2005 FX
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVEPFP:31940
DescriptionACS002N0

The torque converter clutch solenoid valve is activated, with the gear in D5 , M4 and M5 by the TCM in
response to signals sent from the vehicle speed sensor and accelerator pedal position sensor (throttle
position sensor). Torque converter clutch piston operation will then be controlled.

Lock-up operation, however, is prohibited when A/T fluid temperature is too low.

When the accelerator pedal is depressed (less than 1.0/8) in lock-up condition, the engine speed should
not change abruptly. If there is a big jump in engine speed, there is no lock-up.
CONSULT-II Reference ValueACS002N1
On Board Diagnosis LogicACS002N2

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P0740 TCC SOLENOID/CIRC” with CONSULT-II or 3rd judgement flicker with-
out CONSULT-II is detected under the following conditions.
–When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
–When TCM detects as irregular by comparing target value with monitor value.
Possible CauseACS002N3

Torque converter clutch solenoid valve

Harness or connectors
(Solenoid circuit is open or shorted.)
DTC Confirmation ProcedureACS002N4
CAUTION:
Always drive vehicle at a safe speed.
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. (Do not start engine.)
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Touch “START”.
4. Start engine and maintain the following conditions for at least 5 consecutive seconds.
VHCL SPEED SE: 80 km/h (50 MPH) or more
ACCELE POSI: 0.5/8 - 1.0/8
SELECTOR LEVER: “D” position
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
5. If DTC is detected go to AT- 1 2 6 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value (Approx.)
TCC SOLENOID Slip lock-up is active 0.2 - 0.4 A
Lock-up is active 0.4 - 0.6 A
BCIA0031E