Infiniti FX35 / FX45. Manual — part 54
AT-144
< SERVICE INFORMATION >
DTC P1752 INPUT CLUTCH SOLENOID VALVE
4.
Read out the value of “I/C SOLENOID” while driving.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
DETECT MALFUNCTIONING ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
AT-215, "Control Valve with TCM and A/T Fluid Tem-
.
NG
>> Repair or replace damaged parts.
4.
CHECK DTC
Perform
AT-147, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
Item name
Condition
Display value
(Approx.)
I/C SOLENOID
Input clutch disengaged. Refer to
0.6 - 0.8 A
Input clutch engaged. Refer to
0 - 0.05 A
DTC P1757 FRONT BRAKE SOLENOID VALVE
AT-145
< SERVICE INFORMATION >
D
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DTC P1757 FRONT BRAKE SOLENOID VALVE
Description
INFOID:0000000001327271
Front brake 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.
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000001327272
On Board Diagnosis Logic
INFOID:0000000001327273
Diagnostic trouble code “P1757 FR/B SOLENOID/CIRC” with CONSULT-III or 6th 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 Cause
INFOID:0000000001327274
• Harness or connectors
(Solenoid circuit is open or shorted.)
• Front brake solenoid valve
DTC Confirmation Procedure
INFOID:0000000001327275
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-III
1.
Turn ignition switch ON.
2.
Select “SELECTION FROM MENU” in “DATA MONITOR” 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: “3”
⇒
“4” (FR/B ON/OFF)
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
6.
If DTC is detected go to
.
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis Procedure
INFOID:0000000001327276
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 engine.
Item name
Condition
Display value (Approx.)
FR/B SOLENOID
Front brake engaged. Refer to
0.6 - 0.8 A
Front brake disengaged. Refer to
0 - 0.05 A
AT-146
< SERVICE INFORMATION >
DTC P1757 FRONT BRAKE SOLENOID VALVE
4.
Read out the value of “FR/B SOLENOID” while driving.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
DETECT MALFUNCTIONING ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK
>> Replace the control valve with TCM. Refer to
AT-215, "Control Valve with TCM and A/T Fluid Tem-
.
NG
>> Repair or replace damaged parts.
4.
CHECK DTC
Perform
AT-106, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
Item name
Condition
Display value (Approx.)
FR/B SOLENOID
Front brake engaged. Refer to
.
0.6 - 0.8 A
Front brake disengaged. Refer to
0 - 0.05 A
DTC P1762 DIRECT CLUTCH SOLENOID VALVE
AT-147
< SERVICE INFORMATION >
D
E
F
G
H
I
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A
B
AT
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DTC P1762 DIRECT CLUTCH SOLENOID VALVE
Description
INFOID: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 position sensor (throttle position sensor). Gears will then be shifted to the
optimum position.
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000001327284
On Board Diagnosis Logic
INFOID: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 Cause
INFOID:0000000001327286
• Harness or connectors
(Solenoid circuit is open or shorted.)
• Direct clutch solenoid valve
DTC Confirmation Procedure
INFOID:0000000001327287
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-III
1.
Turn ignition switch ON.
2.
Select “SELECTION FROM MENU” in “DATA MONITOR” 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 vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
6.
If DTC is detected, go to
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis Procedure
INFOID: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
0.6 - 0.8 A
Direct clutch engaged. Refer to
.
0 - 0.05 A
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