brake sensor INFINITI FX35 2008 Workshop Manual

AT-88
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.
DATA MONITOR MODE
Display Items List
X: Standard, —: Not applicable, : Option
Monitored item (Unit)Select Monitor Item
Remarks
ECU IN-
PUT SIG- NALS MAIN SIG-
NALS SELEC-
TION
FROM
MENU
VHCL/S SE-A/T (km/h) X X Revolution sensor
VHCL/S SE-MTR (km/h) X —
ACCELE POSI (0.0/8) X — Accelerator pedal position signal
THROTTLE POSI (0.0/8) X X Degree of opening for accelerator recognized by
the TCM
For fail-safe operation, the specific value used
for control is displayed.
CLSD THL POS (ON/OFF) X — Signal input with CAN communications
W/O THL POS (ON/OFF) X —
BRAKE SW (ON/OFF) X — Stop lamp switch
GEAR — X Gear position recognized by the TCM updated
after gear-shifting
ENGINE SPEED (rpm) X X
TURBINE REV (rpm) X X
OUTPUT REV (rpm) X X
GEAR RATIO — X
TC SLIP SPEED (rpm) — X Difference between engine speed and torque
converter input shaft speed
F SUN GR REV (rpm) — —
F CARR GR REV (rpm) — —
ATF TEMP SE 1 (V) X —
ATF TEMP SE 2 (V) X —
ATF TEMP 1 ( °C) — X
ATF TEMP 2 ( °C) — X
BATTERY VOLT (V) X —
ATF PRES SW 1 (ON/OFF) X X (for FR/B solenoid)
ATF PRES SW 2 (ON/OFF) X X (for LC/B solenoid)
ATF PRES SW 3 (ON/OFF) X X (for I/C solenoid)
ATF PRES SW 5 (ON/OFF) X X (for D/C solenoid)
ATF PRES SW 6 (ON/OFF) X X (for HLR/C solenoid)
PNP SW 1 (ON/OFF) X —
PNP SW 2 (ON/OFF) X —
PNP SW 3 (ON/OFF) X —
PNP SW 4 (ON/OFF) X —
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AT-92
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
1.CHECK A/T CHECK INDICATOR LAMP
1. Start the engine with selector lever in “P” pos ition. Warm engine to normal operating temperature.
2. Turn ignition switch ON and OFF at least twice, then leave it in the OFF position.
3. Wait 10 seconds.
4. Turn ignition switch ON. (Do not start engine.)
Does A/T CHECK indicator lamp come on for about 2 seconds?
YES >> GO TO 2.
NO >> Go to AT-170, "
A/T Check Indicator Lamp Does Not Come On".
2.JUDGEMENT PROCEDURE
1. Turn ignition switch OFF.
2. Keep pressing shift lock release button.
3. Move selector lever from “P” to “D” position.
4. Release accelerator pedal. (Set the closed throttle position signal ON.)
5. Depress brake pedal. (Stop lamp switch signal ON.)
6. Turn ignition switch ON. (Do not start engine.)
7. Wait 3 seconds.
8. Move the selector lever to the manual shift gate side. (Manual mode signal ON.)
9. Release brake pedal. (Stop lamp switch signal OFF.)
10. Move the selector lever to “D” position. (Manual mode signal OFF.)
11. Depress brake pedal. (Stop lamp switch signal ON.)
12. Release brake pedal. (Stop lamp switch signal OFF.)
13. Depress accelerator pedal fully and release it.
>> GO TO 3.
3.CHECK SELF-DIAGNOSIS CODE
Check A/T CHECK indicator lamp. Refer to "Judgement Self-diagnosis Code".
If the system does not go into self-diagnostics. Refer to AT-102
, AT-155, AT-164, AT-165.
>> DIAGNOSIS END
Judgement Self-diagnosis Code
If there is a malfunction, the lamp lights up fo r the time corresponding to the suspect circuit.
No. Malfunctioning item No. Malfunctioning item
1 Revolution sensor AT- 1 0 8
12 A/T interlock AT- 1 3 9
2 Direct clutch solenoid valve AT- 1 4 713 A/T 1st engine braking AT-141
3 Torque converter clutch solenoid valve AT- 1 2 4, AT- 1 2 614 Start signal AT- 9 7
4 Line pressure solenoid valve AT- 1 2 815 Accelerator pedal position sensor AT- 1 3 0
5 Input clutch solenoid valve AT- 1 4 316 Engine speed signal AT- 11 2
6 Front brake solenoid valve AT- 1 4 517 CAN communication line AT- 9 4
7 Low coast brake solenoid valve AT- 1 5 1, AT- 1 5 318 1st gear function AT- 11 4
8 High and low reverse clutch solenoid valve AT- 1 4 919 2nd gear function AT- 11 6
9 PNP switch AT- 1 0 220 3rd gear function AT- 11 8
10 A/T fluid temperature sensor AT-13221 4th gear function AT- 1 2 0
11 Turbine revolution sensor AT- 1 0 622 5th gear function AT- 1 2 2
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DTC P1730 A/T INTERLOCKAT-139
< SERVICE INFORMATION >
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DTC P1730 A/T INTERLOCK
DescriptionINFOID:0000000001327247
Fail-safe function to detect interlock conditions.
On Board Diagnosis LogicINFOID:0000000001327248
Diagnostic trouble code “P1730 A/T INTERLOCK” with CO NSULT-III or 12th judgement flicker without CON-
SULT-III is detected when TCM does not receive t he proper voltage signal from the sensor and switch.
TCM monitors and compares gear position and conditions of each ATF pressure switch when gear is steady.
Possible CauseINFOID:0000000001327249
 Harness or connectors
(Solenoid and switch circuit is open or shorted.)
 Low coast brake solenoid valve
 ATF pressure switch 2
DTC Confirmation ProcedureINFOID:0000000001327250
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 “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Touch “START”.
4. Start engine.
5. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds. SLCT LVR POSI: “D” position
6. If DTC is detected, go to AT-139, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Judgement of A/T InterlockINFOID:0000000001327251
 When A/T Interlock is judged to be malfunctioning, the vehicle should be fixed in 2nd gear, and should be set
in a condition in which it can travel.
When one of the following fastening patterns is dete cted, the fail-safe function in correspondence with the
individual pattern should be performed.
NOTE:
When the vehicle is driven fixed in 2nd gear, a turbine revolution sensor malfunction is displayed, but
this is not a turbine r evolution sensor malfunction.
 When interlock is detected at the 3rd gear or more, it is locked at the 2nd gear.
Diagnosis ProcedureINFOID:0000000001327252
1.SELF-DIAGNOSIS
With CONSULT-III
1. Drive vehicle.
2. Stop vehicle and turn ignition switch OFF.
3. Turn ignition switch ON.
4. Select “SELF-DIAG RESULTS” mode for “TRANSMISSION” with CONSULT-III.
Without CONSULT-III
1. Drive vehicle.
2. Stop vehicle and turn ignition switch OFF.
3. Turn ignition switch ON.
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AT-140
< SERVICE INFORMATION >
DTC P1730 A/T INTERLOCK
4. Perform self-diagnosis. Refer to AT-91, "Diagnosis Procedure without CONSULT-III".
OK or NG
OK >> GO TO 2.
NG >> Check low coast brake solenoid valve circuit and function. Refer to AT-151
, AT-153.
2.CHECK DTC
Perform AT-139, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 3.
3.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT-160
.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.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-
perature Sensor 2".
NG >> Repair or replace damaged parts.
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DTC P1731 A/T 1ST ENGINE BRAKING
AT-141
< SERVICE INFORMATION >
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DTC P1731 A/T 1ST ENGINE BRAKING
DescriptionINFOID:0000000001327253
Fail-safe function to prevent sudden decrease in speed by engine brake other than at M1 position.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001327254
On Board Diagnosis LogicINFOID:0000000001327255
Diagnostic trouble code “P1731 A/T 1ST E/BRAKING” with CONSULT-III or 13th judgement flicker without
CONSULT-III is detected under the following conditions.
 When TCM does not receive the proper voltage signal from the sensor.
 When TCM monitors each ATF pressure switch and sol enoid monitor value, and detects as irregular when
engine brake of 1st gear acts other than at M1 position.
Possible CauseINFOID:0000000001327256
 Harness or connectors
(Sensor circuit is open or shorted.)
 Low coast brake solenoid valve
 ATF pressure switch 2
DTC Confirmation ProcedureINFOID:0000000001327257
CAUTION:
 Always drive vehicle at a safe speed.
 Be careful not to rev engine into red zone on the tachometer.
NOTE:
If “DTC Confirmation Procedure” has been previously preformed, 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 “ENGINE SPEED”, “MANU MODE SW” and “GEAR”.
3. Touch “START”.
4. Start engine.
5. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds. ENGINE SPEED: 1,200 rpm
MANU MODE SW: ON
GEAR: “1” position
6. If DTC is detected, go to AT-141, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001327258
1.CHECK INPUT SIGNALS
With CONSULT-III
1. Start the engine.
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III.
3. Drive vehicle in the “M” position (1st gear), and conf irm the ON/OFF actuation of “ATF PRES SW 2” and
“ON OFF SOL”.
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
ATF PRES SW 2 Low coast brake engaged. Refer to
AT- 1 8
.ON
Low coast brake disengaged. Refer to AT- 1 8
.OFF
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AT-142
< SERVICE INFORMATION >
DTC P1731 A/T 1ST ENGINE BRAKING
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 AT-160
.
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-
perature Sensor 2".
NG >> Repair or replace damaged parts.
4.CHECK DTC
Perform AT-141, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
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
ATF PRES SW 2 Low coast brake engaged. Refer to
AT- 1 8
.ON
Low coast brake disengaged. Refer to AT- 1 8
.OFF
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DTC P1757 FRONT BRAKE SOLENOID VALVEAT-145
< SERVICE INFORMATION >
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DTC P1757 FRONT BRAKE SOLENOID VALVE
DescriptionINFOID: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 positi on sensor (throttle position sensor). Gears will then be shifted to the
optimum position.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000001327272
On Board Diagnosis LogicINFOID:0000000001327273
Diagnostic trouble code “P1757 FR/B SO LENOID/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 CauseINFOID:0000000001327274
 Harness or connectors
(Solenoid circuit is open or shorted.)
 Front brake solenoid valve
DTC Confirmation ProcedureINFOID:0000000001327275
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: “3” ⇒ “4” (FR/B 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-145, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID: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
AT- 1 8
. 0.6 - 0.8 A
Front brake disengaged. Refer to AT- 1 8
.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 AT-160
.
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-
perature Sensor 2".
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
AT- 1 8
. 0.6 - 0.8 A
Front brake disengaged. Refer to AT- 1 8
. 0 - 0.05 A
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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
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AT-152
< SERVICE INFORMATION >
DTC P1772 LOW COAST BRAKE SOLENOID VALVE
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 AT-160
.
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-
perature Sensor 2".
NG >> Repair or replace damaged parts.
4.CHECK DTC
Perform AT-151, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
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