2005 INFINITI FX35 Throttle valve

AT-162
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
Revision: 2005 July 2005 FX
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVEPFP:31940
DescriptionACS002PQ
High and low reverse 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.
CONSULT-II Reference ValueACS003KN
On Board Diagnosis LogicACS002PR

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P1767 HLR/C SOL/CIRC” with CONSULT-II or 8th 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 CauseACS002PS

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

High and low reverse clutch solenoid valve
DTC Confirmation ProcedureACS002PT
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 “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 5 consecutive seconds.
ACCELE POSI: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 2nd
3rd Gear (HLR/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
6. If DTC is detected, go to AT- 1 6 3 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value (Approx.)
HLR/C SOL High and low reverse clutch disengaged. Refer to
AT- 2 1
. 0.6 - 0.8 A
High and low reverse clutch engaged. Refer to AT- 2 1
. 0 - 0.05 A
BCIA0031E

AT-164
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
Revision: 2005 July 2005 FX
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
PFP:31940
DescriptionACS002PV

High and low reverse 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 ValueACS003KO
On Board Diagnosis LogicACS002PW

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P1769 HLR/C SOL FNCTN” with CONSULT-II or 8th judgement flicker without
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 6 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 6 is irregular
during releasing accelerator pedal. (Other than during shift change)
Possible CauseACS002PX

Harness or connectors
(Solenoid and switch circuits are open or shorted.)

High and low reverse clutch solenoid valve

ATF pressure switch 6
DTC Confirmation ProcedureACS002PY
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
Selector lever: “D” position
Gear position: 2nd
3rd Gear (HLR/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 (P1769) is detected, go to AT- 1 6 5 , "
Diagnostic Procedure" .
If DTC (P1767) is detected, go to AT- 1 6 3 , "
Diagnostic Procedure" .
If DTC (P1846) is detected, go to AT- 1 8 2 , "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
HLR/C SOL High and low reverse clutch disengaged. Refer to
AT- 2 1
. 0.6 - 0.8 A
High and low reverse clutch engaged. Refer to AT- 2 1
. 0 - 0.05 A
ATF PRES SW 6 High and low reverse clutch engaged. Refer to
AT- 2 1
.ON
High and low reverse clutch disengaged. Refer to AT- 2 1
.OFF
BCIA0031E

AT-166
DTC P1772 LOW COAST BRAKE SOLENOID VALVE
Revision: 2005 July 2005 FX
DTC P1772 LOW COAST BRAKE SOLENOID VALVEPFP:31940
DescriptionACS002Q0
Low coast brake solenoid valve is turned ON or OFF 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.
CONSULT-II Reference ValueACS003KP
On Board Diagnosis LogicACS002Q1

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P1772 LC/B SOLENOID/CIRC” with CONSULT-II or 7th judgement flicker with-
out CONSULT-II is detected when TCM detects an improper voltage drop when it tries to operate the sole-
noid valve.
Possible CauseACS002Q2

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

Low coast brake solenoid valve
DTC Confirmation ProcedureACS002Q3
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 5 consecutive seconds.
Selector lever: “M” position
Gear position: “M1-1st” or “M2-2nd” gear (LC/B ON/OFF)
6. If DTC is detected, go to AT- 1 6 7 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value
ON OFF SOL Low coast brake engaged. Refer to
AT- 2 1
.ON
Low coast brake disengaged. Refer to AT- 2 1
.OFF
BCIA0031E

AT-168
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
Revision: 2005 July 2005 FX
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTIONPFP:31940
DescriptionACS002Q5

Low coast brake solenoid valve is turned ON or OFF 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 ValueACS003KQ
On Board Diagnosis LogicACS002Q6

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P1774 LC/B SOLENOID FNCT” with CONSULT-II or 7th 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 2 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 2 is irregular
during releasing accelerator pedal. (Other than during shift change)
Possible CauseACS002Q7

Harness or connectors
(Solenoid and switch circuits are open or shorted.)

Low coast brake solenoid valve

ATF pressure switch 2
DTC Confirmation ProcedureACS002Q8
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. Selector lever: “M” position
Gear position: “M1-1st” or “M2-2nd” gear (LC/B ON/OFF)
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 (P1774) is detected, go to AT- 1 6 9 , "
Diagnostic Proce-
dure" .
If DTC (P1772) is detected, go to AT- 1 6 7 , "
Diagnostic Proce-
dure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name Condition Display value
ON OFF SOL Low coast brake engaged. Refer to
AT- 2 1
.ON
Low coast brake disengaged. Refer to AT- 2 1
.OFF
ATF PRES SW 2 Low coast brake engaged. Refer to
AT- 2 1
.ON
Low coast brake disengaged. Refer to AT- 2 1
.OFF
BCIA0031E

AT-206
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2005 July 2005 FX
3. CHECK ACCELERATOR POSITION (APP) SENSOR
Check accelerator pedal position (APP) sensor. Refer to AT- 1 3 3 , "
DTC P1705 THROTTLE POSITION SEN-
SOR"
OK or NG
OK >> GO TO 4.
NG >> Repair or replace accelerator pedal position (APP) sensor.
4. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 3 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 5.
NG >> Refill ATF.
5. CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT- 5 4 , "
LINE
PRESSURE TEST" .
OK or NG
OK >> GO TO 8.
NG - 1 >> Line pressure high: GO TO 6.
NG - 2 >> Line pressure low: GO TO 7.
6. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 4 3 , "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 9 0 , "
DISASSEMBLY" .
3. Check the following.
–Oil pump assembly. Refer to AT- 3 0 8 , "Oil Pump" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
SAT638A
SAT494G

TROUBLE DIAGNOSIS BRC-23
[VDC/TCS/ABS]
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M A
B
BRC
Revision: 2005 July 2005 FX
Control Unit Input/Output Signal StandardAFS001SP
REFERENCE VALUE FROM CONSULT-II
CAUTION:
The display shows ABS actuator and electric unit (control unit) calculation data, so a normal value
might be displayed even in the event the output circuit (harness) is open or short-circuited.
Monitor item Display content Data monitor
Check item
Condition Reference value in
normal operation
SLCT LVR POSI A/T shift position P: P position
R: R position
N: N position
D: D position
—
GEAR A/T gear position 1: 1st gear
2: 2nd gear
3: 3rd gear
4: 4th gear
5: 5th gear
FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSOR Wheel speed Vehicle stopped 0 [km/h (MPH)]
BRC-37, "
Inspection 1:
Wheel Sensor Circuit"Vehicle running (Note 1) Almost in accor-
dance with speed-
ometer display
(within ±10 %)
ACCEL POS SIG Open/close condition
of throttle valve (linked
with accelerator pedal). Accelerator pedal not
depressed (ignition switch is
ON) 0 %
Communication circuit
between VDC/TCS/ABS
control unit and ECM
Depress accelerator pedal
(ignition switch is ON) 0 to 100 %
ENGINE SPEED With engine running With engine stopped 0 rpm
EC section
Engine running Almost in accor-
dance with
tachometer display
STR ANGLE SIG Steering angle
detected by steering
angle sensor Straight-ahead Approx. 0 deg
BRC-42, "
Inspection 5:
Steering Angle Sensor
Circuit"Steering wheel turned –756 to 756 deg
YAW RATE SEN Yaw rate detected by
yaw rate sensor Vehicle stopped Approx. 0 d/s
BRC-44, "
Inspection 6:
Yaw Rate/Side G Sensor
(2WD Model), Yaw Rate/
Side/Decel G sensor
(AWD Models) Circuit"
Vehicle running –100 to 100 d/s
SIDE G-SENSOR Transverse G detected
by side G sensor Vehicle stopped
Approx. 0 m/s
2BRC-44, "Inspection 6:
Yaw Rate/Side G Sensor
(2WD Model), Yaw Rate/
Side/Decel G sensor
(AWD Models) Circuit"
Vehicle running–16.7 to 16.7 m/s2
PRESS SENSOR Brake fluid pressure
detected by pressure
sensor With ignition switch turned ON
and brake pedal released Approx. 0 bar
BRC-40, "Inspection 4:
Pressure Sensor Circuit"With ignition switch turned ON
and brake pedal depressed 0 to 170 bar
BATTERY VOLT Battery voltage sup-
plied to ABS actuator
and electric unit (con-
trol unit) Ignition switch ON 10 to 16 V BRC-48, "
Inspection 9:
ABS Actuator and Elec-
tric Unit (Control Unit)
Power Supply and
Ground Circuit"
STOP LAMP SW Brake pedal operation
Brake pedal depressed ON
BRC-50, "
Inspection 10:
Stop Lamp Switch Cir-
cuit"Brake pedal not depressed OFF

TROUBLE DIAGNOSIS BRC-31
[VDC/TCS/ABS]
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M A
B
BRC
Revision: 2005 July 2005 FX
CAUTION:
When “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turning on
ignition switch, “ABS” might not be displayed in the system selection screen. In this case, repeat
the operation from step 1.
4. Return to the Monitor Item Selection screen, and touch “ECU INPUT SIGNALS”, “MAIN SIGNALS” or “SELECTION FROM MENU”. Refer to the following information.
5. When “START” is touched, the data monitor screen is displayed.
Display Item List
Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU
GEAR ××× Gear position judged by PNP
switch signal is displayed.
FR RH SENSOR
(km/h, MPH) ××× Wheel speed calculated by front
RH wheel sensor signal is dis-
played.
FR LH SENSOR
(km/h, MPH) ××× Wheel speed calculated by front
LH wheel sensor signal is dis-
played.
RR RH SENSOR
(km/h, MPH) ××× Wheel speed calculated by rear
RH wheel sensor signal is dis-
played.
RR LH SENSOR
(km/h, MPH) ××× Wheel speed calculated by rear
LH wheel sensor signal is dis-
played.
BATTERY VOLT
(V) ××× Voltage supplied to ABS actuator
and electric unit (control unit) is
displayed.
SLCT LVR POSI ××× Shift position judged by PNP
switch signal.
ACCEL POS SIG
(%) ×
–– Throttle valve open/close status
judged by CAN communication
signal is displayed.
ENGINE SPEED
(rpm) ××× Engine speed judged by CAN
communication signal is displayed.
STR ANGLE SIG
(deg) ×
–– Steering angle detected by steer-
ing angle sensor is displayed.
YAW RATE SEN
(d/s) ××
– Yaw rate detected by yaw rate
sensor is displayed.
DECEL G-SEN (AWD model)
(G) ××× Longitudinal acceleration detected
by decel G-sensor is displayed.
SIDE G-SENSOR
(m/s
2 ) ×
–– Lateral acceleration detected by
side G-sensor is displayed.
PRESS SENSOR
(bar) ×
–– Brake fluid pressure detected by
pressure sensor is displayed.
STOP LAMP SW
(ON/OFF) ××× Stop lamp switch (ON/OFF) status
is displayed.
OFF SW
(ON/OFF)
×× × VDC OFF switch (ON/OFF) sta-
tus is displayed.
ABS WARN LAMP
(ON/OFF) –
×× ABS warning lamp (ON/OFF) sta-
tus is displayed.
SLIP LAMP
(ON/OFF) –
×× SLIP indicator lamp (ON/OFF) sta-
tus is displayed.
FR LH IN SOL
(ON/OFF) –
×× Front LH IN ABS solenoid (ON/
OFF) status is displayed.

EC-1
ENGINE CONTROL SYSTEM
B ENGINE
CONTENTS
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F
G H
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K L
M
SECTION EC
A
EC
Revision: 2005 July 2005 FX
ENGINE CONTROL SYSTEM
VQ35DE
INDEX FOR DTC ...................................................... 15
DTC No. Index .................................................... ... 15
Alphabetical Index ............................................... ... 19
PRECAUTIONS ..................................................... ... 23
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ... 23
On Board Diagnostic (OBD) System of Engine and
A/T ....................................................................... ... 23
Precaution ........................................................... ... 23
PREPARATION ...................................................... ... 27
Special Service Tools .......................................... ... 27
Commercial Service Tools ................................... ... 29
ENGINE CONTROL SYSTEM ............................... ... 30
System Diagram .................................................. ... 30
Multiport Fuel Injection (MFI) System ................. ... 31
Electronic Ignition (EI) System ............................ ... 33
Fuel Cut Control (at No Load and High Engine
Speed) ................................................................. ... 34
AIR CONDITIONING CUT CONTROL .................. ... 35
Input/Output Signal Chart .................................... ... 35
System Description ............................................. ... 35
AUTOMATIC SPEED CONTROL DEVICE (ASCD) ... 36
System Description ............................................. ... 36
Component Description ....................................... ... 37
CAN COMMUNICATION ....................................... ... 38
System Description ............................................. ... 38
EVAPORATIVE EMISSION SYSTEM .................... ... 39
Description .......................................................... ... 39
Component Inspection ........................................ ... 42
Removal and Installation ..................................... ... 43
How to Detect Fuel Vapor Leakage .................... ... 43
ON BOARD REFUELING VAPOR RECOVERY
(ORVR) ................................................................... ... 46
System Description ............................................. ... 46
Diagnostic Procedure .......................................... ... 47
Component Inspection ........................................ ... 49 POSITIVE CRANKCASE VENTILATION ..............
... 51
Description ........................................................... ... 51
Component Inspection ......................................... ... 51
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-
NATS) ..................................................................... ... 53
Description ........................................................... ... 53
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......... ... 54
Introduction .......................................................... ... 54
Two Trip Detection Logic ..................................... ... 54
Emission-Related Diagnostic Information ............ ... 55
Malfunction Indicator Lamp (MIL) ........................ ... 69
OBD System Operation Chart ............................. ... 72
BASIC SERVICE PROCEDURE ............................ ... 78
Basic Inspection .................................................. ... 78
Idle Speed and Ignition Timing Check ................. ... 83
Idle Mixture Ratio Adjustment .............................. ... 85
VIN Registration .................................................. ... 96
Accelerator Pedal Released Position Learning ... ... 96
Throttle Valve Closed Position Learning .............. ... 96
Idle Air Volume Learning ..................................... ... 97
Fuel Pressure Check ........................................... ... 99
TROUBLE DIAGNOSIS ......................................... .101
Trouble Diagnosis Introduction ............................ .101
DTC Inspection Priority Chart .............................. .107
Fail-Safe Chart .................................................... .109
Symptom Matrix Chart ......................................... .110
Engine Control Component Parts Location ......... .114
Vacuum Hose Drawing ........................................ .120
Circuit Diagram .................................................... .121
ECM Harness Connector Terminal Layout .......... .123
ECM Terminals and Reference Value .................. .123
CONSULT-II Function (ENGINE) ......................... .132
Generic Scan Tool (GST) Function ...................... .144
CONSULT-II Reference Value in Data Monitor .... .147
Major Sensor Reference Graph in Data Monitor
Mode .................................................................... .151
TROUBLE DIAGNOSIS - SPECIFICATION VALUE .153
Description ........................................................... .153
Testing Condition ................................................. .153