air conditioning INFINITI QX56 2011 Factory Service Manual

P1705 TP SENSORTM-137
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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P1705 TP SENSOR
DTC LogicINFOID:0000000006226852
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “SLCT LVR POSI” and “VHCL/S SE-A/T ” in “Data Monitor” in “TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 5 seconds or more.
4. Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
Is
“P1705” detected?
YES >> Go to TM-137, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226853
1.CHECK DTC OF ECM
With CONSULT-III
1. Turn ignition switch ON.
2. Perform “Self Diagnostic Results” in “ENGINE”.
Is any DTC detected?
YES >> Check DTC detect ed item. Refer to EC-98, "DTC Index".
NO >> GO TO 2.
2.CHECK DTC OF TCM
With CONSULT-III
Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
Is any DTC other than
“P1705” detected?
YES >> Check DTC detect ed item. Refer to TM-78, "DTC Index".
NO >> GO TO 3.
3.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace the control valve & TCM. Refer to TM-182, "Exploded View".
NO >> Repair or replace damaged parts.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P1705 Accelerator Peda
l Position Sen-
sor Signal Circuit TCM detects the difference be-
tween two accelerator pedal po-
sition signals received from
ECM via CAN communication.Harness or connectors
(Sensor circuit is open or short-
ed.)
SLCT LVR POSI : D
VHCL/S SE-A/T : 5 km/h (3 MPH) or more
Revision: 2010 May2011 QX56

TM-140
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P1730 INTERLOCK
P1730 INTERLOCK
DescriptionINFOID:0000000006226857
Fail-safe function to detect interlock conditions.
DTC LogicINFOID:0000000006226858
DTC DETECTION LOGIC
NOTE:
When the vehicle is driven fixed
in 2GR, an input speed sensor malfunction is displayed, but this is
not an input speed sensor malfunction.
DTC CONFIRMATION PROCEDURE
CAUTION:
“TM-141, "
Diagnosis Procedure"” must be performed before star ting “DTC CONFIRMATION PROCE-
DURE”.
 Never perform “DTC CONFIRMATION PROCEDURE” before completing the repair, which may cause
secondary malfunction.
 Always drive vehicle at a safe speed.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “SLCT LVR POSI” and “GEAR” in “Data Monitor” in “TRANSMISSION”.
3. Drive vehicle the following condition.
4. Perform “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P1730” detected?
YES >> Go to TM-141, "Diagnosis Procedure".
NO >> INSPECTION END
Judgment of InterlockINFOID:0000000006226859
Refer to TM-74, "Fail-Safe".
DTC Trouble diagnosis name DTC is detected if... Possible cause
P1730 Interlock The output speed sensor de-
tects the deceleration of 12 km/
h (7 MPH) or more for 1 sec-
ond. Harness or connectors
(Solenoid valve circuit is open
or shorted.)
 Input clutch solenoid valve
 Direct clutch solenoid valve
 High and low reverse clutch solenoid valve
 Front brake solenoid valve
 Low brake solenoid valve
 2346 brake solenoid valve
 Anti-interlock solenoid valve
 Each clutch
 Hydraulic co ntrol circuit
SLCT LVR POSI : D
GEAR : 1st through 7th
Revision: 2010 May2011 QX56

TM-142
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P1734 7GR INCORRECT RATIO
P1734 7GR INCORRECT RATIO
DescriptionINFOID:0000000006226861
This malfunction is detected when the A/T does not shift
into 7GR position as instructed by TCM. This is not
only caused by electrical malfunction (circuits open or s horted) but by mechanical malfunction such as control
valve sticking, improper solenoid valve operation, etc.
DTC LogicINFOID:0000000006226862
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
“ TM-143, "
Diagnosis Procedure"” must be performed before star ting “DTC CONFIRMATION PROCE-
DURE”.
 Never perform “DTC CONFIRMATION PROCEDURE” before completing the repair, which may cause secondary malfunction.
 Always drive vehicle at a safe speed.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK ATF TEMPERATURE
With CONSULT-III
1. Start the engine.
2. Select “ATF TEMP 1” in “Data Monitor” in “TRANSMISSION”.
3. Check ATF temperature is in the following range.
With GST
1. Start the engine.
2. Drive vehicle for approximately 5 minutes in urban areas.
Is ATF temperature within specified range?
YES >> GO TO 3.
NO >> Drive vehicle to warm ATF or stop engine to cool ATF.
3.CHECK SYMPTOM (PART 1)
With CONSULT-III
1. Select “7TH GR FNCTN P1734” in “DTC & SRT confirmation” in “TRANSMISSION”.
2. Drive vehicle with manual mode and maintain the following conditions.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P1734 Gear 7 Incorrect Ratio The gear ratio is:
 0.821 or more
 0.729 or less Input clutch solenoid valve
 Direct clutch solenoid valve
 High and low reverse clutch
solenoid valve
 Front brake solenoid valve
 Low brake solenoid valve
 2346 brake solenoid valve
 Anti-interlock solenoid valve
 Each clutch and brake
 Output speed sensor
 Input speed sensor 1, 2
 Hydraulic control circuit
ATF TEMP 1 : 20 °C (68 °F) – 140 °C (284 °F)
Revision: 2010 May2011 QX56

P2713 PRESSURE CONTROL SOLENOID DTM-147
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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P2713 PRESSURE CONTROL SOLENOID D
DTC LogicINFOID:0000000006226867
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “BATTERY VOLT”, “MANU MODE SW”, “GEAR” and “VHCL/S SE-A/T” in “Data Monitor” in
“TRANSMISSION”.
3. Drive the vehicle and maintain the following conditions for 5 seconds or more.
4. Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P2713” detected?
YES >> Go to TM-147, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226868
1.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace the control valve & TCM. Refer to TM-208, "4WD : Exploded View".
NO >> Repair or replace damaged parts.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P2713 Pressure Control Solenoid D The high and low reverse clutch
solenoid valve monitor value is
0.4 A or less when the high and
low reverse clutch solenoid
valve command value is more
than 0.75 A. Harness or connectors
(Solenoid valve circuit is
open or shorted.)
 High and low reverse clutch solenoid valve
BATTERY VOLT : 9 V or more
MANU MODE SW : ON
GEAR : 3rd
VHCL/S SE-A/T : 10 km/h (7 MPH) or more
Revision: 2010 May2011 QX56

TM-148
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P2722 PRESSURE CONTROL SOLENOID E
P2722 PRESSURE CONTROL SOLENOID E
DTC LogicINFOID:0000000006226869
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “BATTERY VOLT”, “MANU MODE SW”, “G EAR” and “VHCL/S SE-A/T” in “Data Monitor” in
“TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 5 seconds or more.
4. Perform “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P2722” detected?
YES >> Go to TM-148, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226870
1.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace the control valve & TCM. Refer to TM-208, "4WD : Exploded View".
NO >> Repair or replace damaged parts.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P2722 Pressure Control Solenoid E The low brake solenoid valve
monitor value is 0.4 A or less
when the low brake solenoid
valve command value is more
than 0.75 A. Harness or connectors
(Solenoid valve circuit is
open or shorted.)
 Low brake solenoid valve
BATTERY VOLT : 9 V or more
MANU MODE SW : ON
GEAR : 1st
VHCL/S SE-A/T : 10 km/h (7 MPH) or more
Revision: 2010 May2011 QX56

P2731 PRESSURE CONTROL SOLENOID FTM-149
< DTC/CIRCUIT DIAGNOSIS > [7AT: RE7R01B]
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P2731 PRESSURE CONTROL SOLENOID F
DTC LogicINFOID:0000000006226871
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “BATTERY VOLT”, “MANU MODE SW”, “GEAR” and “VHCL/S SE-A/T” in “Data Monitor” in
“TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 5 seconds or more.
4. Perform “Self Diagnostic Resu lts” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P2731” detected?
YES >> Go to TM-149, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226872
1.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace the control valve & TCM. Refer to TM-182, "Exploded View".
NO >> Repair or replace damaged parts.
DTC Trouble diagnosis name DTC is detected if... Possible cause
P2731 Pressure Control Solenoid F The 2346 brake solenoid valve
monitor value is 0.4 A or less
when the 2346 brake solenoid
valve command value is more
than 0.75 A. Harness or connectors
(Solenoid valve circuit is
open or shorted.)
 2346 brake solenoid valve
BATTERY VOLT : 9 V or more
MANU MODE SW : ON
GEAR : 2nd
VHCL/S SE-A/T : 10 km/h (7 MPH) or more
Revision: 2010 May2011 QX56

TM-150
< DTC/CIRCUIT DIAGNOSIS >[7AT: RE7R01B]
P2807 PRESSURE CO
NTROL SOLENOID G
P2807 PRESSURE CONTROL SOLENOID G
DTC LogicINFOID:0000000006226873
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” is previously c onducted, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
>> GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select “BATTERY VOLT”, “MANU MODE SW”, “G EAR” and “VHCL/S SE-A/T” in “Data Monitor” in
“TRANSMISSION”.
3. Drive vehicle and maintain the following conditions for 5 seconds or more.
4. Perform “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT-III”.
Is
“P2807” detected?
YES >> Go to TM-150, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006226874
1.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
Is the inspection result normal?
YES >> Replace the control valve & TCM. Refer to TM-208, "4WD : Exploded View".
NO >> Repair or replace damaged parts.
DTC Trouble diagnosis name DTC is detected is... Possible cause
P2807 Pressure Control Solenoid G The direct clutch solenoid valve
monitor value is 0.4 A or less
when the direct clutch solenoid
valve command value is more
than 0.75 A. Harness or connectors
(Solenoid valve circuit is
open or shorted.)
 Direct clutch solenoid valve
BATTERY VOLT : 9 V or more
MANU MODE SW : ON
GEAR : 1st
VHCL/S SE-A/T : 10 km/h (7 MPH) or more
Revision: 2010 May2011 QX56

VTL-6
< SYSTEM DESCRIPTION >
VENTILATION SYSTEM
SYSTEM DESCRIPTION
VENTILATION SYSTEM
VENTILATION SYSTEM (FRONT AIR CONDITIONING)
VENTILATION SYSTEM (FRONT AIR CO NDITIONING) : System Description
INFOID:0000000006276284
OUTLINE
Ventilation system is controlled by A/C control. For details of air conditioner system, refer to HAC-14, "FRONT
AUTOMATIC AIR CONDITIONING SYSTEM : System Description".
AIR FLOW
Front
Rear
AIR DISTRIBUTION
Front A/C Unit
JMIIA0647ZZ
JMIIA0648ZZ
Discharge air flow
Mode position Condition Air outlet/distribution
VENT FOOT DEF (4)
Center (1) Side (2) Upper (3) Front (5) Rear (6)
DUAL and Up-
per ventilator
switch: ON ×××
———
××××× —
— ×××××
— ×××××
— ×——— ×
Revision: 2010 May2011 QX56

VENTILATION SYSTEMVTL-7
< SYSTEM DESCRIPTION >
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VENTILATION SYSTEM (R EAR AIR CONDITIONING)
VENTILATION SYSTEM (REAR AIR CONDI TIONING) : System Description
INFOID:0000000006276285
OUTLINE
Rear cooling system is controlled by rear blower switch. Refer to HAC-23, "REAR AUTOMATIC AIR CONDI-
TIONING SYSTEM : System Description".
AIR FLOW
AIR DISTRIBUTION
Rear A/C Unit
JMIIA0649ZZ
Discharge air flow
Mode position Air outlet/distribution
VENT (1) FOOT (2)
× —
××
— ×
Revision: 2010 May2011 QX56