2005 INFINITI QX4 ignition

TROUBLE DIAGNOSIS FOR SYMPTOMS
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Revision: October 20052005 QX56
2. CHECK 1ST POSITION SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for
"A/T" with CONSULT-II.
3. Read out "1 POSITION SW" switch moving selector lever to
each position.
Without CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine)
2. Check voltage between A/T device harness connector terminal
and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to AT-13, "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
Monitor item Condition Display value
1 POSITION SWWhen setting the selector
lever to "1" position.ON
When setting selector
lever to other positions.OFF
LCIA0339E
Item Connector No.Te r m i n a l N o .
(Wire color)ConditionData
(Approx.)
1st position
switchM2037 (Y/G) -
GroundWhen setting
the selector
lever to "1"
position.0V
When setting
selector lever
to other posi-
tions.Battery volt-
age
LCIA0341E
SAT6 3 8A

TROUBLE DIAGNOSIS FOR SYMPTOMS
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9. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT-60,
"Symptom Chart" (Symptom No.17).
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
Vehicle Does Not Decelerate By Engine BrakeECS00CKN
SYMPTOM:
No engine brake is applied when the gear is shifted from the 22 to 11 .
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis.
Do the self-diagnosis results indicate PNP switch, ATF pressure switch 5?
YES >> Check the malfunctioning system. Refer to AT-104, "DTC P0705 PARK/NEUTRAL POSITION
SWITCH" , AT - 1 6 4 , "DTC P1845 ATF PRESSURE SWITCH 5" .
NO >> GO TO 2.
2. CHECK 1ST POSITION SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for
"A/T" with CONSULT-II.
3. Read out "1 POSITION SW" moving switch selector lever to
each position.
Without CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine)
2. Check voltage between A/T device harness connector terminal
and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
Monitor item Condition Display value
1 POSITION SWWhen setting the selector
lever to "1" position.ON
When setting selector
lever to other positions.OFF
LCIA0339E
Item Connector No.Te r m i n a l N o .
(Wire color)ConditionData
(Approx.)
1st position
switchM2037 (Y/G) -
GroundWhen setting
the selector
lever to "1"
position.0V
When setting
selector lever
to other posi-
tions.Battery volt-
age
LCIA0341E

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

AT-224
A/T SHIFT LOCK SYSTEM
Revision: October 20052005 QX56
Shift Lock Control Unit Reference ValuesECS00CKR
SHIFT LOCK HARNESS CONNECTOR TERMINALS LAYOUT
SHIFT LOCK CONTROL UNIT INSPECTION TABLE
Data are reference values.
NOTE:
Confirm that the pointer swings only momentarily because the output time is so short. If the inspection is done with an oscilloscope, it
should be observed that the power source voltage lasts for 3.5 to 10 ms.
LCIA0327E
TER-
MINAL
NO.WIRE
COLORITEM CONDITIONVOLTAGE
(Approx.)
1 Y/R Power sourceIgnition switch: “ON” Battery voltage
Ignition switch: “OFF” Battery voltage
2L/R Detention switch
(for key)When selector lever is not in "P" position with key inserted. Battery voltage
Except the above 0V
3GRDetention switch
(for shift)When selector lever is not in "P" position Battery voltage
Except the above 0V
4 R/G Stop lamp switchWhen brake pedal is depressed Battery voltage
When brake pedal is released 0V
5W/RVehicle speed sig-
nal——
——
6 G/R Ignition signalIgnition switch: “OFF” 0V
Ignition switch: “ON” Battery voltage
7 R/W Shift lock solenoidWhen brake pedal is depressed with ignition switch "ON". 0V
When brake pedal is depressed. Battery voltage
8 B Ground Always 0V
9 G/W Key lock solenoidWhen the selector lever is set to a position other than the “P”
position, and the key switch is turned from “ON” to “OFF”Battery voltage for
approx. 0.1 sec.
(Note)
Except the above 0V
10 W/G Key unlock solenoidWhen ignition switch is not in "ON” position with key inserted.Battery voltage for
approx. 0.1 sec.
(Note)
Except the above 0V

AT-228
SHIFT CONTROL SYSTEM
Revision: October 20052005 QX56
REMOVAL
1. Remove A/T finisher.

Refer to IP-13, "A/T Finisher" .
2. Disconnect selector control cable.
3. Disconnect A/T device harness connector.
4. Remove control device assembly.
INSTALLATION
Installation is in reverse order of removal. Be careful of the following:

After installation is completed, adjust and check A/T position.
Adjustment of A/T PositionECS00CKU
1. Loosen nut of control cable.
2. Place PNP switch and selector lever in “P” position.
3. After pushing the control cable in the direction shown with a
force of 9.8 N·m (1kg-m, 2.2 lb-ft), release it. This is in the natu-
ral state, tighten control cable nut to specifications.
Checking of A/T PositionECS00CKV
1. Place selector lever in “P” position, and turn ignition switch ON
(engine stop).
2. Make sure selector lever can be shifted to other than “P” posi-
tion when brake pedal is depressed. Also make sure selector
lever can be shifted from “P” position only when brake pedal is
depressed.
3. Move the selector lever and check for excessive effort, sticking,
noise or rattle.
4. Confirm the selector lever stops at each position with the feel of
engagement when it is moved through all the positions. Check
whether or not the actual position the selector lever is in
matches the position shown by the shift position indicator and
the transmission body.
5. The method of operating the lever to individual positions correctly should be as shown.
6. Confirm the back-up lamps illuminate only when lever is placed in the “R” position. Confirm the back-up
lamps does not illuminate when selector lever is pushed against “R” position in the “P” or “N” position.
7. Confirm the engine can only be started with the selector lever in the “P” and “N” positions.
8. Make sure transmission is locked completely in “P” position.Control cable nut : 14.5 N·m (1.5 kg-m, 11 ft-lb)
LCIA0345E
LCIA0325E

TROUBLE DIAGNOSIS
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Revision: October 20052005 QX56
TROUBLE DIAGNOSISPFP:00004
CONSULT-II Function (HVAC)EJS003XD
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II BASIC OPERATION
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 carries out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and “CON-
SULT-II CONVERTER” to the data link connector, and turn the
ignition switch ON.
2. Touch “START (NISSAN BASED VHCL)”.
3. Touch “HVAC” on “SELECT SYSTEM” screen. If “HVAC” is not
indicated, go to GI-39, "
CONSULT-II Data Link Connector (DLC)
Circuit" .
Diagnostic mode Description
SELF-DIAG RESULTS Displays front air control self-diagnosis results.
DATA MONITOR Displays front air control input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read.
ECU PART NUMBER Front air control part number can be read.
BBIA0369E
BCIA0029E
BCIA0030E

TROUBLE DIAGNOSIS
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Revision: October 20052005 QX56
Display Item List
*: DENT is displayed when MODE switch is between selections.
Monitor item Value Contents
BATT VIA CAN "V" Displays battery voltage signal.
IGN VIA CAN "ON/OFF" Displays ignition switch signal.
DVR SUNLD SEN "w/m2" Displays optical sensor (driver) signal.
PAS SUNLD SEN "w/m2" Displays optical sensor (passenger) signal.
AMB TEMP SEN "°C/°F" Displays ambient sensor signal.
EVAP TEMP SEN "°C/°F" Displays intake sensor signal.
INCAR TMP SEN "°C/°F" Displays in-vehicle sensor signal.
RR TEMPSET FR "V" Displays air mix door (front) set point signal.
RR TEMPSET RR "V" Displays air mix door (rear) set point signal.
MODE FDBCK "V" Displays mode door motor feedback signal.
DVR MIX FDBCK "V" Displays air mix door motor (driver) feedback signal.
PAS MIX FDBCK "V" Displays air mix door motor (passenger) feedback signal.
RR FDBCK "V" Displays air mix door motor (rear) feedback signal.
DEF FDBCK "V" Displays defroster door motor feedback signal.
RECIRC "ON/OFF" Displays recirculation switch signal.
DEFROST "ON/OFF" Displays defroster switch signal.
AUTO "ON/OFF" Displays AUTO switch signal.
A/C "ON/OFF" Displays A/C switch signal.
MODE "ON/OFF" Displays MODE switch signal.
L TEMP UP "ON/OFF" Displays driver side temperature control dial (temp increase) signal.
L TEMP DOWN "ON/OFF" Displays driver side temperature control dial (temp decrease) signal.
R TEMP UP "ON/OFF" Displays rear temperature control dial [front (temp increase)] signal.
R TEMP DOWN "ON/OFF" Displays Rear temperature control dial [front (temp decrease)] signal.
RR DEFOG "ON/OFF" Displays rear defroster request signal.
FANUP "ON/OFF" Displays front blower motor (blower speed increase) signal.
FANDOWN "ON/OFF" Displays front blower motor (blower speed decrease) signal.
MODE SELECT" [ PNL ]"
" [ MIX ]"
" [ FLR ]"
" [ DEFR ]"
" [ MAX ]"
" [ DENT ]" Displays mode door motor position.

ATC-36
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
CONSULT-II Function (BCM)EJS003XE
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II BASIC OPERATION
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 carries out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and “CON-
SULT-II CONVERTER” to the data link connector, and turn the
ignition switch ON.
2. Touch “START (NISSAN BASED VHCL)”.
3. Touch “BCM” on “SELECT SYSTEM” screen. If “BCM” is not
indicated, go to GI-39, "
CONSULT-II Data Link Connector (DLC)
Circuit" .
BCM diagnostic
test itemDiagnostic mode Description
Inspection by partWORK SUPPORTSupports inspections and adjustments. Commands are transmitted to the BCM
for setting the status suitable for required operation, input/output signals are
received from the BCM and received data is displayed.
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 result 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
BCIA0030E