ESP INFINITI QX4 2005 Factory Owner's Manual

AT-154
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
Revision: October 20052005 QX56
DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE FUNCTION
PFP:31940
DescriptionECS00CIN

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 ValueECS0 0CIO
On Board Diagnosis LogicECS00CIP

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P1769 HLR/C SOL FNCTN” with 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 CauseECS0 0CIQ

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

High and low reverse clutch solenoid valve

ATF pressure switch 6
DTC Confirmation ProcedureECS00CIR
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 POS: 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, refer to AT-155, "
Diagnostic Procedure" .
If DTC (P1767) is detected, go to AT- 1 5 3 , "
Diagnostic Procedure" .
If DTC (P1846) is detected, go to AT- 1 6 7 , "
Diagnostic Procedure" .
Item name Condition Display value (Approx.)
HLR/C SOL High and low reverse clutch disengaged. Refer to AT- 1 9
.0.6 - 0.8 A
High and low reverse clutch engaged. Refer to AT- 1 9
. 0 - 0.05 A
ATF PRES SW 6High and low reverse clutch engaged. Refer to AT- 1 9
.ON
High and low reverse clutch disengaged. Refer to AT- 1 9
.OFF
BCIA0030E

AT-156
DTC P1772 LOW COAST BRAKE SOLENOID VALVE
Revision: October 20052005 QX56
DTC P1772 LOW COAST BRAKE SOLENOID VALVEPFP:31940
DescriptionECS00CIT
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 ValueECS00CIU
On Board Diagnosis LogicECS00CIV

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P1772 LC/B SOLENOID/CIRC” with CONSULT-II is detected when TCM detects
an improper voltage drop when it tries to operate the solenoid valve.
Possible CauseECS00CIW

Harness or connectors
(The solenoid circuit is open or shorted.)

Low coast brake solenoid valve
DTC Confirmation ProcedureECS00CIX
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 “ENGINE” with CONSULT-II.
3. Start engine.
4. Drive vehicle and maintain the following conditions for at least 5
consecutive seconds.
Selector lever: “1” or “2”
Gear position: “1st” or “2nd” gear (LC/B ON/OFF)
5. If DTC is detected, go to AT-157, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “With CONSULT-II”.
Item name Condition Display value
ON OFF SOLLow coast brake engaged. Refer to AT- 1 9
.ON
Low coast brake disengaged. Refer to AT- 1 9
.OFF
BCIA0030E

AT-158
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
Revision: October 20052005 QX56
DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTIONPFP:31940
DescriptionECS00CIZ

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 ValueECS0 0CJ 0
On Board Diagnosis LogicECS0 0CJ 1

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P1774 LC/B SOLENOID FNCT” with 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 CauseECS0 0CJ 2

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

Low coast brake solenoid valve

ATF pressure switch 2
DTC Confirmation ProcedureECS0 0CJ 3
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: “1” or “2” position
Gear position: “1st” or “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, refer to AT-159, "
Diagnostic Pro-
cedure" .
If DTC (P1772) is detected, go to AT-157, "
Diagnostic Proce-
dure" .
WITH GST
Follow the procedure “With CONSULT-II”.
Item name Condition Display value
ON OFF SOLLow coast brake engaged. Refer to AT- 1 9
.ON
Low coast brake disengaged. Refer to AT- 1 9
.OFF
ATF PRES SW 2Low coast brake engaged. Refer to AT- 1 9
.ON
Low coast brake disengaged. Refer to AT- 1 9
.OFF
BCIA0030E

AT-222
A/T SHIFT LOCK SYSTEM
Revision: October 20052005 QX56
A/T SHIFT LOCK SYSTEMPFP:34950
DescriptionECS00CKO

The electrical key interlock mechanism also operates as a shift lock:
With the ignition switch turned to ON, the selector lever cannot be shifted from “P” (parking) to any other
position unless the brake pedal is depressed.
With the key removed, the selector lever cannot be shifted from “P” to any other position.
The key cannot be removed unless the selector lever is placed in “P”.

The shift lock and key interlock mechanisms are controlled by the ON-OFF operation of the shift lock sole-
noid and by the operation of the rotator and slider located inside the key cylinder, respectively.
Shift Lock System Electrical Parts LocationECS00CKP
LCIA0326E

A/T SHIFT LOCK SYSTEM
AT-225
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: October 20052005 QX56
Component InspectionECS00CKS
SHIFT LOCK SOLENOID

Check operation by applying battery voltage to the A/T device.
CAUTION:
Be sure to apply the voltage of the correct polarity to the
respective terminals. Otherwise, the part may be damaged.
DETENTION SWITCH
For key:

Check continuity between terminals of the A/T device.
DETENTION SWITCH
For shift:

Check continuity between terminals of the A/T device.
KEY LOCK SOLENOID
Key lock

Check operation by applying battery voltage to key switch and
key lock solenoid.
CAUTION:
Be careful not to cause burnout of the harness.
Connector No. Terminal No.
M203 9 (Battery voltage) - 10 (Ground)
LCIA0328E
ConditionConnector
No.Terminal No. Continuity
When selector lever is “P”
position.
M203 5 - 6No
When selector lever is not “P”
position.Ye s
LIIA1599E
ConditionConnector
No.Terminal No. Continuity
When selector lever is “P”
position.
M203 3 - 4No
When selector lever is not “P”
position.Ye s
WCIA0401E
Connector No. Terminal No.
M27 1 (Battery voltage) - 2 (Ground)
WCIA0240E

ATC-56
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
SELF-DIAGNOSIS CODE CHART
Code No. Reference page
02 EE changed by calibrationATC-147, "
FRONT AIR CONTROL"
03 Battery voltage out of rangeSC-4, "BATTERY"
12 Air mix door motor (Passenger) circuit failureAT C - 7 6 , "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (PASSENGER)"
20 BCM not responding to A/C requestAT C - 11 6 , "DIAGNOSTIC PROCEDURE FOR MAGNET
CLUTCH"
21 BCM not responding to rear defroster requestGW-77, "REAR WINDOW DEFOGGER"
22 Air mix door motor (Driver) circuit failureAT C - 7 2 , "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (DRIVER)"
30 In-vehicle sensor circuit out of range (low)
ATC-145, "Intake Sensor Circuit"31 In-vehicle sensor circuit out of range (high)
38 Air mix door motor (rear) circuit failureAT C - 7 9 , "
DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (REAR)"
40 Ambient sensor circuit short
ATC-137, "Ambient Sensor Circuit"41 Ambient sensor circuit open
44 In-vehicle sensor motor circuit open
ATC-145, "
Intake Sensor Circuit"46 In-vehicle sensor motor circuit short
50 Optical sensor (Driver) circuit open or short
ATC-143, "
Optical Sensor Circuit"52 Optical sensor (Passenger) circuit open or short
56 Intake sensor circuit short
ATC-145, "
Intake Sensor Circuit"57 Intake sensor circuit open
62 Defroster door motor circuit failureAT C - 8 7 , "
Defroster Door Motor Circuit"
80 CAN bus faultLAN-5, "CAN COMMUNICATION"
82 Intake door motor (driver) circuit malfunctionAT C - 8 5 , "DIAGNOSTIC PROCEDURE FOR INTAKE DOOR
MOTOR"
90 Stuck buttonATC-147, "FRONT AIR CONTROL"
92 Mode door motor circuit failureAT C - 6 4 , "Mode Door Motor Circuit"

ATC-170
DUCTS AND GRILLES
Revision: October 20052005 QX56
DUCTS AND GRILLESPFP:27860
ComponentsEJS003YP
Ducts - Front Heater and Cooling Unit Assembly
WJIA0956E

REFRIGERANT LINES
ATC-175
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: October 20052005 QX56
REFRIGERANT LINESPFP:92600
HFC-134a (R-134a) Service ProcedureEJS003YR
SETTING OF SERVICE TOOLS AND EQUIPMENT
Discharging Refrigerant
WA RN ING:
Avoid breathing A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and
throat. Remove HFC-134a (R-134a) refrigerant from the A/C system using certified service equipment
meeting requirements of SAE J2210 HFC-134a (R-134a) recycling equipment or SAE J2201 HFC-134a
(R-134a) recovery equipment. If an accidental system discharge occurs, ventilate the work area before
resuming service. Additional health and safety information may be obtained from the refrigerant and
lubricant manufacturers.
Evacuating System and Charging Refrigerant
1. Shut-off valve 2. A/C service valve 3. Recovery/recycling equipment
WJIA0579E
1. Shut-off valve 2. A/C service valve 3. Recovery/recycling equipment
4. Refrigerant container (HFC-134a) 5. Weight scale (J-39650) 6. Evacuating vacuum pump (J-39699)
7. Manifold gauge set (J-39183)
WJIA0580E

AUDIO
AV-29
C
D
E
F
G
H
I
J
L
MA
B
AV
Revision: October 20052005 QX56
NOTE:
1. The following noise results from variations in field strength, such as fading noise and multi-path noise, or
external noise from trains and other sources. It is not a malfunction.

Fading noise: This noise occurs because of variations in the field strength in a narrow range due to moun-
tains or buildings blocking the signal.

Multi-path noise: This noise results from the waves sent directly from the broadcast station arriving at the
antenna at a different time from the waves which reflect off mountains or buildings.
FOR CD ONLY
Noise InspectionEKS00BIH
The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and opera-
tion of each piece of electrical equipment, and determine the cause.
NOTE:
The source of the noise can be found easily by listening to the noise while removing the fuses of electrical
components, one by one.
TYPE OF NOISE AND POSSIBLE CAUSE
Symptom Possible cause
CD cannot be inserted.

CD

Audio unit CD cannot be ejected.
The CD cannot be played.
The sound skips, stops suddenly, or is distorted.
Occurrence condition Possible cause
Occurs only when engine is ON.A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed.

Ignition components
A whistling noise occurs while the engine speed is
high. A booming noise occurs while the engine is
running and the lighting switch is ON.

Generator
The occurrence of the noise is linked with the operation of the fuel pump.

Fuel pump condenser
Noise only occurs when various
electrical components are oper-
ating.A cracking or snapping sound occurs with the
operation of various switches.

Relay malfunction, audio unit malfunction
The noise occurs when various motors are operat-
ing.

Motor case ground

Motor
The noise occurs constantly, not just under certain conditions.

Rear defogger coil malfunction

Open circuit in printed heater

Poor ground of antenna amplifier or
antenna feeder line
A cracking or snapping sound occurs while the vehicle is being driven, especially
when it is vibrating excessively.

Ground wire of body parts

Ground due to improper part installation

Wiring connections or a short circuit

AV-68
NAVIGATION SYSTEM
Revision: October 20052005 QX56
Setting of the under section display
How To Perform Under Section Display Setting
1. Select “Setting of the Under Section Display”.

The setting status that is selected from A/C or AV is shown at the lower part of the screen.
Vehicle Electronic Systems
Application Items
How To Perform Navigation Setting
1. Start the engine.
2. Push “SETTING” button.
3. Select “Vehicle Electronic Systems”.
System Settings
How To Perform System Setting
1. Start the engine.
2. Push “SETTING” button.
3. Select “System Settings”.
Icon Description
Adjust Driver Seat When Exiting Vehicle The driver's seat automatically moves back and returns to the original position.
Lift Steering Column When Exiting Vehicle The steering column automatically tilts up and returns to the original position.
Remote Unlock Driver's Door FirstThis option allows selection of which doors will unlock first during an unlocking oper-
ation.
Keyless Remote Response — HornThis option allows the horn chirp mode when pressing the LOCK or UNLOCK button
on the keyfob to be changed.
Keyless Remote Response — LightsThis option allows the hazard flash mode when pressing the LOCK or UNLOCK but-
ton on the keyfob to be changed.
Auto Re-Lock Time This option allows the length of time before doors auto re-lock to be set.
Sensitivity of Automatic Headlights This option allows the sensitivity of the autolights to be set.
Automatic Headlights Off Delay This option allows the length of time before the autolights turn off to be set.
Speed Dependent Wiper This option allows the driving speed dependent wiper function to be turned on or off.
Return All Settings to Default All settings will return to the initial conditions.
WKIA1802E
SKIA4536E