2008 INFINITI FX35 ESP

DTC P1762 DIRECT CLUTCH SOLENOID VALVE
AT-147
< SERVICE INFORMATION >
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DTC P1762 DIRECT CLUTCH SOLENOID VALVE
DescriptionINFOID:0000000001327283
Direct clutch solenoid valve is controlled by the TCM in response to signals sent from the PNP switch, vehicle
speed sensor and accelerator pedal positi on sensor (throttle position sensor). Gears will then be shifted to the
optimum position.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000001327284
On Board Diagnosis LogicINFOID:0000000001327285
Diagnostic trouble code “P1762 D/C SOLENOID/CIRC” with CONSULT-III or 2nd judgement flicker without
CONSULT-III 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 CauseINFOID:0000000001327286
 Harness or connectors
(Solenoid circuit is open or shorted.)
 Direct clutch solenoid valve
DTC Confirmation ProcedureINFOID:0000000001327287
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, alw ays 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-III
1. Turn ignition switch ON.
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III
and check monitor “ACCELE POSI”, “SLCT LVR POSI” and “GEAR”.
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
SLCT LVR POSI: “D” position
GEAR: “1” ⇒ “2” (D/C ON/OFF)
Driving location: Driving the vehic le uphill (increased engine load) will help maintain the driving
conditions required for this test.
6. If DTC is detected, go to AT-147, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000001327288
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch ON.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start the engine.
Item name Condition Display value (Approx.)
D/C SOLENOID Direct clutch disengaged. Refer to
AT- 1 8
. 0.6 - 0.8 A
Direct clutch engaged. Refer to AT- 1 8
.0 - 0.05 A
:

DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
AT-149
< SERVICE INFORMATION >
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DTC P1767 HIGH AND LOW REVER SE CLUTCH SOLENOID VALVE
DescriptionINFOID:0000000001327295
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 positi on sensor (throttle position sensor). Gears will then
be shifted to the optimum position.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000001327296
On Board Diagnosis LogicINFOID:0000000001327297
Diagnostic trouble code “P1767 HLR/C SOL/CIRC” with CO NSULT-III or 8th judgement flicker without CON-
SULT-III 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 CauseINFOID:0000000001327298
 Harness or connectors
(Solenoid circuit is open or shorted.)
 High and low reverse clutch solenoid valve
DTC Confirmation ProcedureINFOID:0000000001327299
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, alw ays 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-III
1. Turn ignition switch ON.
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III
and check monitor “ACCELE POSI”, “SLCT LVR POSI” and “GEAR”.
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
SLCT LVR POSI: “D” position
GEAR: “2” ⇒ “3” (HLR/C ON/OFF)
Driving location: Driving the vehic le uphill (increased engine load) will help maintain the driving
conditions required for this test.
6. If DTC is detected, go to AT-149, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000001327300
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch ON.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start the engine.
Item name Condition Display value (Approx.)
HLR/C SOL High and low reverse clutch disengaged. Refer to
AT- 1 8
. 0.6 - 0.8 A
High and low reverse clutch engaged. Refer to AT- 1 8
.0 - 0.05 A
:

DTC P1772 LOW COAST BRAKE SOLENOID VALVE
AT-151
< SERVICE INFORMATION >
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DTC P1772 LOW COAST BRAKE SOLENOID VALVE
DescriptionINFOID:0000000001327307
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 positi on sensor (throttle position sensor). Gears will then
be shifted to the optimum position.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000001327308
On Board Diagnosis LogicINFOID:0000000001327309
Diagnostic trouble code “P1772 LC/B SOLENOID/CIRC” with CONSULT-III or 7th judgement flicker without
CONSULT-III is detected when TCM detects an improper voltage drop when it tries to operate the solenoid
valve.
Possible CauseINFOID:0000000001327310
 Harness or connectors
(Solenoid circuit is open or shorted.)
 Low coast brake solenoid valve
DTC Confirmation ProcedureINFOID:0000000001327311
NOTE:
If “DTC Confirmation Procedure” has been previously performed, alw ays 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-III
1. Turn ignition switch ON.
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III
and check monitor “MANU MODE SW” and “GEAR”.
3. Touch “START”.
4. Start engine.
5. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
MANU MODE SW: ON
GEAR: “1” or “2” (LC/B ON/OFF)
6. If DTC is detected, go to AT-151, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000001327312
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Turn ignition switch ON.
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine.
4. Read out the value of “ON OFF SOL” while driving.
Item name Condition Display value
ON OFF SOL Low coast brake engaged. Refer to
AT- 1 8
.ON
Low coast brake disengaged. Refer to AT- 1 8
.OFF
Item name Condition Display value
ON OFF SOLLow coast brake engaged. Refer to
AT- 1 8
.ON
Low coast brake disengaged. Refer to AT- 1 8
.OFF
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTIONAT-153
< SERVICE INFORMATION >
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DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
DescriptionINFOID:0000000001327313
 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 positi on sensor (throttle position sensor). Gears will then
be shifted to the optimum position.
 This is not only caused by electrical malfunction (cir cuits open or shorted) but also by mechanical malfunc-
tion such as control valve sticking, improper solenoid valve operation.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000001327314
On Board Diagnosis LogicINFOID:0000000001327315
Diagnostic trouble code “P1774 LC/B SOLENOID FNCT” with CONSULT-III or 7th judgement flicker without
CONSULT-III is detected under the following conditions.
 When TCM detects that actual gear ratio is irr egular, 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 CauseINFOID:0000000001327316
 Harness or connectors
(Solenoid and switch circuits are open or shorted.)
 Low coast brake solenoid valve
 ATF pressure switch 2
DTC Confirmation ProcedureINFOID:0000000001327317
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, alw ays 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-III
1. Start engine.
2. Accelerate vehicle to maintain the following conditions. MANU MODE SW: ON
GEAR: “1” or “2” (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 “TRANS MISSION” with CONSULT-III. If DTC (P1774) is
detected, go to AT-153, "
Diagnosis Procedure".
If DTC (P1772) is detected, go to AT-151, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000001327318
1.CHECK INPUT SIGNALS
Item name Condition Display value
ON OFF SOLLow coast brake engaged. Refer to
AT- 1 8
.ON
Low coast brake disengaged. Refer to AT- 1 8
.OFF
ATF PRES SW 2 Low coast brake engaged. Refer to
AT- 1 8
.ON
Low coast brake disengaged. Refer to AT- 1 8
.OFF
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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ATC-18
< SERVICE INFORMATION >
REFRIGERATION SYSTEM
Evaporator intake air temperature is less than 20°C (68 °F).
Engine is running at speeds less than 1,500 rpm.
This is because the V-6 compressor prov ides a means of “capacity” control.
2. The V-6 variable compressor provides refrigerant c ontrol under varying conditions. During cold winters, it
may not produce high refrigerant pressure discharge (compared to previous units) when used with air
conditioning systems.
3. A “clanking” sound may occasionally be heard during re frigerant charge. The sound indicates that the tilt
angle of the wobble (swash) plate has changed and is not a malfunction.
4. For air conditioning systems with the V-6 compresso r, the clutch remains engaged unless: the system
main switch, fan switch or ignition switch is tur ned OFF. When ambient (outside) temperatures are low or
when the amount of refrigerant is insufficient, t he clutch is disengaged to protect the compressor.
DESCRIPTION
General
The variable compressor is a swash plate type that c hanges piston stroke in response to the required cooling
capacity.
The tilt of the wobble (swash) plate allows the piston’ s stroke to change so that refrigerant discharge continu-
ously change from 14.5 to 184 cm
3 (0.885 to 11.228 cu in).
RJIA1260E
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ATC-24
< SERVICE INFORMATION >
AIR CONDITIONER CONTROL
AIR CONDITIONER CONTROL
Description of Air Conditioner LAN Control SystemINFOID:0000000001328167
The LAN (Local Area Network) syst em consists of unified meter and A/C amp., mode door motor, air mix door
motors and intake door motor.
A configuration of these component s is shown in the figure below.
System ConstructionINFOID:0000000001328168
A small network is constructed between the unifi ed meter and A/C amp., air mix door motors, mode door
motor and intake door motor. The unified meter and A/C amp. and motors are connected by data transmission
lines and motor power supply lines. The LAN network is built through the ground circuits of each door motor.
Addresses, motor opening angle signals, motor stop si gnals and error checking messages are all transmitted
through the data transmission lines connecting the unified meter and A/C amp. and each door motor.
The following functions are contained in LCUs built into the air mix door motors, the mode door motor and the
intake door motor.
 Address
 Motor opening angle signals
 Data transmission
 Motor stop and drive decision
 Opening angle sensor (PBR function)
 Comparison
 Decision (Unified meter and A/C amp. indicated value and motor opening angle comparison)
OPERATION
The unified meter and A/C amp. receives data from each of the sensors. The unified meter and A/C amp.
sends mode door, air mix door and intake door opening angle data to the mode door motor LCU, air mix door
motor LCU and intake door motor LCU.
The mode door motor, air mix door motors and intake door motor read their respective signals according to the
address signal. Opening angle indication signals received from the unified meter and A/C amp. and each of
the motor position sensors is compared by the LCUs in each door motor with the existing decision and open-
ing angles. Subsequently, HOT/COLD, DEF/VENT and FRE/ REC operation is selected. The new selection
data is returned to the unified meter and A/C amp.
SJIA1609E
RJIA1747E
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TROUBLE DIAGNOSISATC-47
< SERVICE INFORMATION >
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10.CHECK IN-VEHICLE SENSOR
Press (DEF) switch for the second time. Temperature detected
by in-vehicle sensor is indicated on the display.
NOTE:
If the temperature indicated on the display greatly differs from the
actual temperature, check sensor circuit first, and then check sensor.
OK or NG
OK >> GO TO 11.
NG >> Go to In-vehicle Sensor Circuit. Refer to ATC-88, "
In-
vehicle Sensor Circuit".
11 .CHECK INTAKE SENSOR
Press (DEF) switch for the third time. Temperature detected by
intake sensor is indicated on the display.
NOTE:
If the temperature indicated on the display greatly differs from the
actual temperature, check sensor circuit first, and then check sensor.
OK or NG
OK >> GO TO 12.
NG >> Go to Intake Sensor Circuit. Refer to ATC-94, "
Intake
Sensor Circuit".
12.CHECK CAN COMMUNICATION ERROR
1. Press intake switch.
2. CAN communication error between the unified meter and A/C amp. and the display control unit can be detected as self-diag-
nosis results. (If plural errors occur, the display of each error will
blink twice for 0.5 second intervals.)
OK or NG
OK >> 1. Turn ignition switch OFF or AUTO switch ON. 2. INSPECTION END
NG >> Go to CAN communication. Refer to BCS-11, "
CON-
SULT-III Function (BCM)".
 Unified meter and A/C amp. - Display control unit
13.CHECK MALFUNCTIONING SENSOR AND DOOR MOTOR
Refer to the following chart for malfunctioning code No.
(If two or more sensors and door motors malfuncti on, corresponding code Nos. indicates 1 second each.)
*1: Perform self-diagnosis STEP-2 under sunshine.
PJIA0152E
PJIA0153E
SJIA1611E
Code No. Malfunctioning sensor and door motor (Including circuits) Reference page 21 / −21 Ambient sensor ATC-86, "
Ambient Sensor Circuit"
22 / −22 In-vehicle sensor AT C - 8 8 , "In-vehicle Sensor Circuit"
24 / −24 Intake sensor AT C - 9 4 , "Intake Sensor Circuit"
25 / −25
Sunload sensor*1AT C - 9 1 , "Sunload Sensor Circuit"
26 / −26 Air mix door motor PBR (Driver side)
AT C - 6 2 , "Air Mix Door Motor PBR Circuit"27 / −27 Air mix door motor PBR (Passenger side)
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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ATC-48
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
When performing indoors, aim a light (more than 60 W) at sunload sensor, otherwise code No. 25 will indicate
despite that sunload sensor is functioning properly.
>> INSPECTION END
14.CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH
Mode and/or intake door motor PBR(s) is/are malfunctioning.
(If two or more mode or intake door motors malfunc tion, corresponding code Nos. indicates 1 second each.)
*1: If mode door motor harness c onnector is disconnected, the following display pattern will appear.
31 →32 →33 →34 →35 →36 →Return to 31
*2: If intake door motor harness connector is disconnected, the following display pattern will appear.
37 →38 →39 →Return to 37
*3: FOOT position during automatic control. Refer to "AUXILIARY MECHANISM: FOOT POSITION SETTING
TRIMMER".
>> INSPECTION END
AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER
The trimmer compensates for differences in range of ±3 °C ( ±6 °F) between temperature setting (displayed dig-
itally) and temperature felt by customer.
Operating procedures for this trimmer are as follows:1. Begin self-diagnosis STEP-5 mode. Refer to "Self-diagnosis Function".
2. Press (fan) UP switch to set system in auxiliary mode.
3. Display shows “61” in auxiliary mechanism. It ta kes approximately 3 seconds to enable setting operation.
SJIA1781E
Code No. *1 *2Mode or intake door position Reference page
31 VENT
Mode door motorAT C - 5 7 , "
Mode Door Motor Circuit"
32 B/L 1
33 B/L 2
34
FOOT
*3
35 D/F
36 DEF
37 FRE
Intake door motorATC-62, "
Intake Door Motor Circuit"38 20% FRE
39 REC
SJIA1782E
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