2004 INFINITI QX56 display

EC-576Revision: August 2007
DTC P2138 APP SENSOR
2004 QX56
DTC P2138 APP SENSORPFP:18002
Component DescriptionUBS00HCS
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine oper-
ation such as fuel cut.
CONSULT-II Reference Value in Data Monitor ModeUBS00HCT
Specification data are reference values.
*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differ from ECM terminal voltage.
On Board Diagnosis LogicUBS00HCU
This self-diagnosis has the one trip detection logic.
NOTE:
If DTC P2138 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229. Refer to
EC-424, "
DTC P1229 SENSOR POWER SUPPLY" .
FAIL -S AFE M OD E
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
PBIB1741E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN1

Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.5 - 1.0V
Accelerator pedal: Fully depressed 4.2 - 4.8V
ACCEL SEN2*

Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.5 - 1.0V
Accelerator pedal: Fully depressed 4.2 - 4.8V
CLSD THL POS

Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2138
2138Accelerator pedal position
sensor circuit range/per-
formance problemRationally incorrect voltage is sent to ECM
compared with the signals from APP sensor 1
and APP sensor 2.

Harness or connector
(APP sensor 1 and 2 circuit is open or
shorted.)
(TP sensor circuit is shorted.)

Accelerator pedal position sensor 1 and 2

Electric throttle control actuator
(TP sensor)

ECM pin terminal
Engine operating condition in fail-safe mode
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.

EC-630Revision: August 2007
ASCD INDICATOR
2004 QX56
Diagnostic ProcedureUBS00HDW
1. CHECK OVERALL FUNCTION
Check ASCD indicator under the following conditions.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2. CHECK DTC
Check that DTC U1000 or U1001 is not displayed.
OK or NG
OK >> GO TO 3.
NG >> Perform trouble diagnosis for DTC U1000, U1001. Refer to EC-135, "
DTC U1000, U1001 CAN
COMMUNICATION LINE" .
3. CHECK DTC WITH COMBINATION METER
Refer to DI-5, "
COMBINATION METERS" .
OK or NG
OK >> GO TO 4.
NG >> Go to DI-5, "
COMBINATION METERS" .
4. CHECK INTERMITTENT INCIDENT
Refer to EC-127, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
ASCD INDICATOR CONDITION SPECIFICATION
CRUISE LAMP

Ignition switch: ON
ON/OFF(MAIN) switch: Pressed at
the 1st time → at the 2nd timeON → OFF
SET LAMP

ON/OFF(MAIN) switch: ON

When vehicle speed is between
40 km/h (25 MPH) and 144 km/h
(89 MPH)

COAST/SET switch: Pressed ON

COAST/SET switch: Released OFF

EC-638Revision: August 2007
EVAPORATIVE EMISSION SYSTEM
2004 QX56
WITH CONSULT-II
1. Attach the EVAP service port adapter securely to the EVAP service port.
2. Also attach the pressure pump and hose to the EVAP service port adapter.
3. Turn ignition switch ON.
4. Select the “EVAP SYSTEM CLOSE” of “WORK SUPPORT
MODE” with CONSULT-II.
5. Touch “START”. A bar graph (Pressure indicating display) will
appear on the screen.
6. Apply positive pressure to the EVAP system until the pressure
indicator reaches the middle of the bar graph.
7. Remove EVAP service port adapter and hose with pressure
pump.
8. Locate the leak using a leak detector. Refer to EC-634, "
EVAP-
ORATIVE EMISSION LINE DRAWING" .
WITHOUT CONSULT-II
1. Attach the EVAP service port adapter securely to the EVAP ser-
vice port.
2. Also attach the pressure pump with pressure gauge to the EVAP
service port adapter.
PEF 8 38 U
PEF 9 17 U
SEF 2 00 U
SEF 4 62 UA

EI-36
FLOOR TRIM
Revision: August 20072004 QX56
FLOOR TRIMPFP:74902
Removal and InstallationEIS002XK
1. Remove front seats. Refer to SE-96, "FRONT SEAT" .

Remove subwoofer. Refer to AV- 4 6 , "Removal and Installation of Subwoofer" .

Remove navigation display control unit. Refer to AV- 1 5 8 , "Removal and Installation of Display Control
Unit" .
2. Remove second row seats. Refer to SE-103, "
Second Row Outboard" and SE-103, "Second Row Cen-
ter" , if equipped.
3. Remove third row rear seat. Refer to SE-103, "
Third Row" .
4. Remove lower seat belt anchors. Refer to SB-3, "
SEAT BELTS" .
5. Remove lower body side trim. Refer to EI-34, "
BODY SIDE TRIM" .
6. Remove luggage lower side finishers (left / right). Refer to EI-39, "
LUGGAGE FLOOR TRIM" .
7. Remove kicking plates. Refer to EI-34, "
BODY SIDE TRIM" .
8. Remove center console. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
9. Remove rear console, if equipped. Refer to IP-17, "
Rear Console" .
10. Remove rear lower finisher. Refer to EI-39, "
LUGGAGE FLOOR TRIM" .
11. Remove carpet.
12. Remove floor mat hooks from front carpet.
Installation is in the reverse order of removal.
1. Inspection hole cover 2. Seal 3. Carpet
4. Floor mat hook 5. Plastic clip
WIIA0267E

EI-38
HEADLINING
Revision: August 20072004 QX56
CAUTION:
Disconnect both terminals from battery in advance.
1. Remove body side trim. Refer to EI-34, "
BODY SIDE TRIM" .
2. Remove luggage floor trim. Refer to EI-39, "
LUGGAGE FLOOR TRIM" .
3. Remove sunvisor assemblies.
4. Remove sunvisor clips.
5. Remove sunroof welt (if equipped).
6. Remove front roof console.

Disconnect harnesses.
7. Remove rear roof console.

Disconnect harnesses.
8. Remove assist grips.
9. Remove lamp assembly from rear roof finisher.

Disconnect harness.
10. Remove rear roof finisher.
11. Remove headlining.

Remove clips from rear of headlining.

Disconnect harnesses.
12. Remove rear air control.

Disconnect harness.
13. Remove rear audio control assembly.

Disconnect harness.
14. Remove lamp assemblies.

Disconnect harnesses.
15. Remove air vents.
16. Remove the front roof console bracket.
17. Remove rear roof console front bracket.
18. Remove assist grip brackets from roof.
Installation is in the reverse order of removal.
1. Headlining (without sunroof) 2. Assist grip bracket 3. Assist grip
4. Sunvisor assembly LH 5. Cap LH 6. Sunvisor holder
7. Front roof console 8. Sunglass bin 9. Sunroof welt
10. Cap RH 11. Sunvisor assembly RH 12. Rear roof console bracket
13. Rear storage bin or DVD display 14. Rear air control 15. Rear audio control assembly
16. Rear roof console 17. Rear roof console finisher 18. Rear storage bin
19. Air vent 20. Lamp assembly 21. Plastic clip
22. Headlining (with sunroof) 23. Rear lamp lens 24. Rear lamp
25. Rear roof finisher 26. Plastic clip 27. Metal clip

ON-VEHICLE SERVICE
FSU-7
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Revision: August 20072004 QX56

Check with the manufacturer of your specific alignment machine for their recommended Service/Cali-
bration Schedule.
THE ALIGNMENT PROCESS
IMPORTANT: Use only the alignment specifications listed in this Service Manual. Refer to FSU-21,
"Wheelarch Height (Unladen*1 )" .
1. When displaying the alignment settings, many alignment machines use “indicators”: (Green/red, plus or
minus, Go/No Go). Do NOT use these indicators.

The alignment specifications programmed into your alignment machine that operate these indicators
may not be correct.

This may result in an ERROR.
2. Some newer alignment machines are equipped with an optional “Rolling Compensation” method to “com-
pensate” the sensors (alignment targets or head units). Do NOT use this “Rolling Compensation”
method.

Use the “Jacking Compensation” method. After installing the alignment targets or head units, raise the
vehicle and rotate the wheels 1/2 turn both ways.

See Instructions in the alignment machine you are using for more information.
CAMBER AND CASTER
1. Measure camber and caster of both the right and left wheels
with a suitable alignment gauge and adjust as necessary to
specification.
2. If outside of the specified value, adjust camber and caster using
the adjusting bolts in the front lower link.
CAUTION:
After adjusting the camber then check the toe-in.
NOTE:
Camber changes about 3' (0.11°) with each graduation of one
adjusting bolt. Refer to table below for examples of lower link
adjusting bolt effect on camber and caster.
3. Tighten the adjusting bolt nuts to specification. Refer to FSU-5, "
Components" . Camber : Refer to FSU-20, "
Wheel Alignment
(Unladen*1 )" .
SRA0 96 A
LEIA0092E
Rear adjusting
bolt1 In 1 Out 1 In 1 Out 0 0 1 In 1 Out
Front adjusting
bolt1 Out 1 In 1 In 1 Out 1 In 1 Out 0 0
Camber
Degree minute
(Decimal degree)0 (0) 0 (0) 7' (0.11°)-7' (-0.11°)3' (0.11°) -3' (-0.11°)3' (0.11°) -3' (-0.11°)
Caster
Degree minute
(Decimal degree)-14' (-0.11°) 14' (0.11°) 0 (0) 0 (0) 7' (0.11°) -7' (-0.11°)-7' (-0.11°)7' (0.11°)

POWER WINDOW SYSTEM
GW-33
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Revision: August 20072004 QX56
Work FlowEIS002UU
1. Check the symptom and customer's requests.
2. Understand the outline of system. Refer to GW-15, "
System Description" .
3. According to the trouble diagnosis chart, repair or replace the cause of the malfunction.
Refer to GW-36, "
Trouble Diagnoses Symptom Chart" .
4. Does power window system operate normally? Yes, GO TO 5, If No, GO TO 3.
5. INSPECTION END.
CONSULT-II Function (BCM)EIS002UV
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II INSPECTION PROCEDURE
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
1. Connect CONSULT-II and CONSULT-II CONVERTER to the
data link connector.
2. Turn ignition switch ON.
3. Touch “START (NISSAN BASED VHCL)”.
BCM diagnostic
test itemDiagnostic mode Content
Inspection by partWORK SUPPORT Changes setting of each function.
DATA MONITOR Displays BCM input/output data in real time.
ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
SELF-DIAG RESULTS Displays BCM self-diagnosis results.
CAN DIAG SUPPORT MNTR The results of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER BCM part number can be read.
CONFIGURATION Performs BCM configuration read/write functions.
BBIA0369E
BCIA0029E

REAR WINDOW DEFOGGER
GW-79
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Revision: August 20072004 QX56
System DescriptionEIS002VN
The rear window defogger system is controlled by BCM (body control module) and IPDM E/R (intelligent
power distribution module engine room).
The rear window defogger operates only for approximately 15 minutes.
Power is supplied at all times

through 15A fuses (No. 43, 46, and 47, located in the IPDM E/R)

to rear window defogger relay terminals 3 and 6 (located in the IPDM E/R)

through 50A fusible link (letter f , located in the fuse and fusible link box)

to BCM terminal 70.
With the ignition switch turned to ON or START position,
Power is supplied

through ignition switch

to rear window defogger relay (located in the IPDM E/R)

through 10A fuse (No. 59, located in the fuse and relay box)

to BCM terminal 38

through 10A fuse [No. 8, located in the fuse block (J/B)]

to front air control terminal 14.
Ground is supplied

to BCM terminal 67

to front air control terminal 1

through body grounds M57, M61 and M79

to IPDM E/R terminals 38 and 59

through body grounds E9, E15 and E24.
When front air control (rear window defogger switch) is turned to ON,
Ground is supplied

to BCM terminal 9

through front air control terminal 11

through front air control terminal 1

through body grounds M57, M61 and M79.
Then rear window defogger switch is illuminated.
Then BCM recognizes that rear window defogger switch is turned to ON.
Then it sends rear window defogger switch signals to IPDM E/R and display control unit via DATA LINE (CAN-
H, CAN-L).
When display control unit receives rear window defogger switch signals, and displays on the screen.
When IPDM E/R receives rear window defogger switch signals,
Ground is supplied

to rear window defogger relay (located in the IPDM E/R)

through IPDM E/R terminal 38

through IPDM E/R terminal 59

through body grounds E9, E15 and E24.
Then rear window defogger relay is energized.
With power and ground supplied, rear window defogger filaments heat and defog the rear window.
When rear window defogger relay is turned to ON,
Power is supplied

through heated mirror relay (located in the IPDM E/R)

through IPDM E/R terminal 23

to door mirror defogger (LH and RH) terminal 10.
Door mirror defogger (LH and RH) is grounded through body grounds M57, M61 and M79.
With power and ground supplied, rear window defogger filaments heat and defog the rear window and door
mirror defogger filaments heat and defog the mirror.