pressure INFINITI M35 2006 Factory Workshop Manual

AT-94
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
*1: Refer to EC-69, "Malfunction Indicator Lamp (MIL)" (for VQ35DE engine), EC-780, "Malfunction Indicator Lamp (MIL)" (for VK45DE
engine).
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL. D/C SOLENOID
FNCTN
TCM detects that actual gear ratio is irregular, and relation
between gear position and condition of ATF pressure
switch 5 is irregular during depressing accelerator pedal.
(Other than during shift change.)
TCM detects that relation between gear position and condi-
tion of ATF pressure switch 5 is irregular during releasing
accelerator pedal. (Other than during shift change.)P1764 P1764*2AT-157
HLR/C SOL/CIRC
Normal voltage not applied to solenoid due to functional
malfunction, cut line, short, or the like.
TCM detects as irregular by comparing target value with
monitor value.P1767 P1767AT-159
HLR/C SOL
FNCTN
TCM detects that actual gear ratio is irregular, and relation
between gear position and condition of ATF pressure
switch 6 is irregular during depressing accelerator pedal.
(Other than during shift change.)
TCM detects that relation between gear position and condi-
tion of ATF pressure switch 6 is irregular during releasing
accelerator pedal. (Other than during shift change.)P1769 P1769*2AT-161
LC/B SOLENOID/
CIRCNormal voltage not applied to solenoid due to functional
malfunction, cut line, short, or the like.P1772 P1772AT-163
LC/B SOLENOID
FNCT
TCM detects an improper voltage drop when it tries to oper-
ate the solenoid valve.
Condition of ATF pressure switch 2 is different from monitor
value, and relation between gear position and actual gear
ratio is irregular.P1774 P1774*2AT-165
MANU MODE SW/
CIRCWhen an impossible pattern of switch signals is detected, a
malfunction is detected.P1815 —AT-167
ATF PRES SW 1/
CIRC
TCM detects that actual gear ratio is normal, and relation
between gear position and condition of ATF pressure
switch 1 is irregular during depressing accelerator pedal.
(Other than during shift change.)P1841 —AT-172
ATF PRES SW 3/
CIRC
TCM detects that actual gear ratio is normal, and relation
between gear position and condition of ATF pressure
switch 3 is irregular during depressing accelerator pedal.
(Other than during shift change.)P1843 —AT-174
ATF PRES SW 5/
CIRC
TCM detects that actual gear ratio is normal, and relation
between gear position and condition of ATF pressure
switch 5 is irregular during depressing accelerator pedal.
(Other than during shift change.)P1845 —AT-176
ATF PRES SW 6/
CIRC
TCM detects that actual gear ratio is normal, and relation
between gear position and condition of ATF pressure
switch 6 is irregular during depressing accelerator pedal.
(Other than during shift change.)P1846 —AT-178
NO DTC IS
DETECTED FUR-
THER TESTING
MAY BE
REQUIRED
No NG item has been detected. X X — Items (CONSULT-
II screen terms)Malfunction is detected when...TCM self-
diagnosisOBD-II (DTC)
Reference
page
“A/T” with
CONSULT-IIMIL indicator
lamp*1,
“ENGINE” with
CONSULT-II or
GST

AT-104
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
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 9
10 A/T fluid temperature sensor AT-135
2 Direct clutch solenoid valve AT- 1 5 5 , AT- 1 5 711 Turbine revolution sensor AT- 11 7
3Torque converter clutch solenoid valve AT- 1 2 6 , AT-
12812 A/T interlock AT-142
4 Line pressure solenoid valve AT- 1 3 013 A/T 1st engine braking AT- 1 4 5
5 Input clutch solenoid valve AT-147 , AT-14914 Start signal AT-108
6 Front brake solenoid valve AT-151 , AT-15315 Accelerator pedal position sensor AT-132
7 Low coast brake solenoid valve AT-163 , AT-16516 Engine speed signal AT-124
8High and low reverse clutch solenoid valve AT-159 ,
AT- 1 6 117 CAN communication line AT-105
9 PNP switch AT- 11 3
SCIA5767E

AT-130
DTC P0745 LINE PRESSURE SOLENOID VALVE
Revision: 2006 January2006 M35/M45
DTC P0745 LINE PRESSURE SOLENOID VALVEPFP:31940
DescriptionNCS001M3
The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in
response to a signal sent from the TCM.
CONSULT-II Reference ValueNCS001M4
On Board Diagnosis LogicNCS001M5
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P0745 L/PRESS SOL/CIRC” with CONSULT-II or 4th judgement flicker without
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 CauseNCS001M6
Harness or connectors
(Solenoid circuit is open or shorted.)
Line pressure solenoid valve
DTC Confirmation ProcedureNCS001M7
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. Engine start and wait for at least 5 seconds.
5. If DTC is detected, go to AT-131, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value (Approx.)
LINE PRES SOL During driving 0.2 - 0.6A
BCIA0030E

DTC P0745 LINE PRESSURE SOLENOID VALVE
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Revision: 2006 January2006 M35/M45
Diagnostic ProcedureNCS001M8
1. CHECK INPUT SIGNAL
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.
4. Read out the value of “LINE PRES SOL” during driving.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT-180, "
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 >> Replace the control valve with TCM. Refer to AT- 2 3 6 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to AT- 1 3 0 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value (Approx.)
LINE PRES SOL During driving 0.2 - 0.6A
SCIA4793E

AT-142
DTC P1730 A/T INTERLOCK
Revision: 2006 January2006 M35/M45
DTC P1730 A/T INTERLOCKPFP:00000
DescriptionNCS001MT
Fail-safe function to detect interlock conditions.
On Board Diagnosis LogicNCS001MU
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P1730 A/T INTERLOCK” with CONSULT-II or 12th judgement flicker without
CONSULT-II is detected when TCM does not receive the proper voltage signal from the sensor and
switch.
TCM monitors and compares gear position and conditions of each ATF pressure switch when gear is
steady.
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.
Possible CauseNCS001MV
Harness or connectors
(Solenoid and switch circuit is open or shorted.)
Low coast brake solenoid valve
AT F p r e s s u r e s w i t c h 2
DTC Confirmation ProcedureNCS001MW
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.
5. Drive vehicle and maintain the following conditions for at least 2
consecutive seconds.
SLCT LVR POSI: “D” position
6. If DTC is detected, go to AT-143, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
BCIA0030E

DTC P1730 A/T INTERLOCK
AT-143
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Revision: 2006 January2006 M35/M45
Judgement of A/T InterlockNCS001MX
When A/T Interlock is judged to be malfunctioning, the vehicle should be fixed in 2nd gear, and should be set
in a condition in which it can travel.
When one of the following fastening patterns is detected, the fail-safe function in correspondence with the indi-
vidual pattern should be performed.
A/T INTERLOCK COUPLING PATTERN TABLE
: NG, X: OK
Diagnostic ProcedureNCS001MY
1. CHECK SELF-DIAGNOSTIC RESULTS
With CONSULT-II
1. Drive vehicle.
2. Stop vehicle and turn ignition switch OFF.
3. Turn ignition switch ON. (Do not start engine.)
4. Select “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
Without CONSULT-II
1. Drive vehicle.
2. Stop vehicle and turn ignition switch OFF.
3. Turn ignition switch ON. (Do not start engine.)
4. Perform self-diagnosis. Refer to AT- 1 0 3 , "
TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)" .
OK or NG
OK >> GO TO 2.
NG >> Check low coast brake solenoid valve circuit and function. Refer to AT- 1 6 3 , "
DTC P1772 LOW
COAST BRAKE SOLENOID VALVE" , AT- 1 6 5 , "DTC P1774 LOW COAST BRAKE SOLENOID
VALVE FUNCTION" .
2. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to AT- 1 4 2 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 3.
Gear positionATF pressure switch output
Fail-safe
functionClutch pressure output pattern after fail-safe func-
tion
SW3
(I/C)SW6
(HLR/
C)SW5
(D/C)SW1
(FR/B)SW2
(LC/B)I/C HLR/C D/C FR/B LC/B L/U
A/T interlock
coupling pat-
tern3rd – X X –
Held in
2nd gearOFF OFF ON OFF OFF OFF
4th – X X –
Held in
2nd gearOFF OFF ON OFF OFF OFF
5th X X – X
Held in
2nd gearOFF OFF ON OFF OFF OFF
BCIA0031E

DTC P1731 A/T 1ST ENGINE BRAKING
AT-145
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Revision: 2006 January2006 M35/M45
DTC P1731 A/T 1ST ENGINE BRAKINGPFP:00000
DescriptionNCS001MZ
Fail-safe function to prevent sudden decrease in speed by engine brake other than at M1 position.
CONSULT-II Reference ValueNCS001N0
On Board Diagnosis LogicNCS001N1
This is not an OBD-II self-diagnostic item.
Diagnostic trouble code “P1731 A/T 1ST E/BRAKING” with CONSULT-II or 13th judgement flicker without
CONSULT-II is detected under the following conditions.
–When TCM does not receive the proper voltage signal from the sensor.
–When TCM monitors each ATF pressure switch and solenoid monitor value, and detects as irregular when
engine brake of 1st gear acts other than at M1 position.
Possible CauseNCS001N2
Harness or connectors
(Sensor circuit is open or shorted.)
Low coast brake solenoid valve
ATF pressure switch 2
DTC Confirmation ProcedureNCS001N3
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 preformed, 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.
5. Drive vehicle and maintain the following conditions for at least 2
consecutive seconds.
ENGINE SPEED: 1,200 rpm
MANU MODE SW: ON
GEAR: “1” position
6. If DTC is detected, go to AT-146, "
Diagnostic Procedure" .
Item name Condition Display value
ON OFF SOLLow coast brake engaged. Refer to AT- 2 1
. ON
Low coast brake disengaged. Refer to AT- 2 1
. OFF
ATF PRES SW 2Low coast brake engaged. Refer to AT- 2 1
. ON
Low coast brake disengaged. Refer to AT- 2 1
. OFF
BCIA0030E

DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTION
AT-149
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Revision: 2006 January2006 M35/M45
DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTIONPFP:31940
DescriptionNCS001NB
Input clutch solenoid valve is controlled by the TCM in response to signals sent from the PNP switch, vehi-
cle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then be
shifted to the optimum position.
This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical mal-
function such as control valve sticking, improper solenoid valve operation.
CONSULT-II Reference ValueNCS001NC
On Board Diagnosis LogicNCS001ND
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P1754 I/C SOLENOID FNCTN” with CONSULT-II or 5th judgement flicker with-
out CONSULT-II is detected under the following conditions.
–When TCM detects that actual gear ratio is irregular, and relation between gear position and condition of
ATF pressure switch 3 is irregular during depressing accelerator pedal. (Other than during shift change.)
–When TCM detects that relation between gear position and condition of ATF pressure switch 3 is irregular
during releasing accelerator pedal. (Other than during shift change.)
Possible CauseNCS001NE
Harness or connectors
(Solenoid and switch circuits are open or shorted.)
Input clutch solenoid valve
ATF pressure switch 3
DTC Confirmation ProcedureNCS001NF
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. Start engine.
2. Accelerate vehicle to maintain the following conditions.
ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: “D” position
GEAR: “3”
“4” (I/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. Perform step 2 again.
4. Turn ignition switch OFF, then perform step 1 to 3 again.
5. Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II. If DTC (P1754) is detected, go to AT-150, "
Diagnostic Procedure" .
If DTC (P1752) is detected, go to AT-148, "
Diagnostic Procedure" .
If DTC (P1843) is detected, go to AT-175, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
I/C SOLENOIDInput clutch disengaged. Refer to AT- 2 1
. 0.6 - 0.8A
Input clutch engaged. Refer to AT- 2 1
. 0 - 0.05A
ATF PRES SW 3Input clutch engaged. Refer to AT- 2 1
. ON
Input clutch disengaged. Refer to AT- 2 1
. OFF
BCIA0030E

DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION
AT-153
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Revision: 2006 January2006 M35/M45
DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTIONPFP:31940
DescriptionNCS001NN
Front brake solenoid valve is controlled by the TCM in response to signals sent from the PNP switch, vehi-
cle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then be
shifted to the optimum position.
This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical mal-
function such as control valve sticking, improper solenoid valve operation.
CONSULT-II Reference ValueNCS001NO
On Board Diagnosis LogicNCS001NP
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P1759 FR/B SOLENOID FNCT” with CONSULT-II or 6th judgement flicker with-
out CONSULT-II is detected under the following conditions.
–When TCM detects that actual gear ratio is irregular, and relation between gear position and condition of
ATF pressure switch 1 is irregular during depressing accelerator pedal. (Other than during shift change.)
–When TCM detects that relation between gear position and condition of ATF pressure switch 1 is irregular
during releasing accelerator pedal. (Other than during shift change.)
Possible CauseNCS001NQ
Harness or connectors
(Solenoid and switch circuits are open or shorted.)
Front brake solenoid valve
ATF pressure switch 1
DTC Confirmation ProcedureNCS001NR
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. Start engine.
2. Accelerate vehicle to maintain the following conditions.
ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: “D” position
GEAR: “3”
“4” (FR/B ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. Perform step 2 again.
4. Turn ignition switch OFF, then perform step 1 to 3 again.
5. Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II. If DTC (P1759) is detected, go to AT-154, "
Diagnostic Procedure" .
If DTC (P1757) is detected, go to AT-152, "
Diagnostic Procedure" .
If DTC (P1841) is detected, go to AT-173, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
FR/B SOLENOIDFront brake engaged. Refer to AT- 2 1
. 0.6 - 0.8A
Front brake disengaged. Refer to AT- 2 1
. 0 - 0.05A
ATF PRES SW 1Front brake engaged. Refer to AT- 2 1
. ON
Front brake disengaged. Refer to AT- 2 1
. OFF
BCIA0030E

DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION
AT-157
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Revision: 2006 January2006 M35/M45
DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTIONPFP:31940
DescriptionNCS001NZ
Direct clutch solenoid valve is controlled by the TCM in response to signals sent from the PNP switch,
vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then be
shifted to the optimum position.
This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical mal-
function such as control valve sticking, improper solenoid valve operation.
CONSULT-II Reference ValueNCS001O0
On Board Diagnosis LogicNCS001O1
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P1764 D/C SOLENOID FNCTN” with CONSULT-II or 2nd judgement flicker with-
out CONSULT-II is detected under the following conditions.
–When TCM detects that actual gear ratio is irregular, and relation between gear position and condition of
ATF pressure switch 5 is irregular during depressing accelerator pedal. (Other than during shift change.)
–When TCM detects that relation between gear position and condition of ATF pressure switch 5 is irregular
during releasing accelerator pedal. (Other than during shift change.)
Possible CauseNCS001O2
Harness or connectors
(Solenoid and switch circuits are open or shorted.)
Direct clutch solenoid valve
ATF pressure switch 5
DTC Confirmation ProcedureNCS001O3
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. Start engine.
2. Accelerate vehicle to maintain the following conditions.
ACCELE POSI: 1.5/8 - 2.0/8
SLCT LVR POSI: “D” position
GEAR: “1”
“2” (D/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. Perform step 2 again.
4. Turn ignition switch OFF, then perform step 1 to 3 again.
5. Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II. If DTC (P1764) is detected, go to AT-158, "
Diagnostic Procedure" .
If DTC (P1762) is detected, go to AT-156, "
Diagnostic Procedure" .
If DTC (P1845) is detected, go to AT-177, "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
D/C SOLENOIDDirect clutch disengaged. Refer to AT- 2 1
. 0.6 - 0.8A
Direct clutch engaged. Refer to AT- 2 1
. 0 - 0.05A
ATF PRES SW 5Direct clutch engaged. Refer to AT- 2 1
. ON
Direct clutch disengaged. Refer to AT- 2 1
. OFF
BCIA0030E