Infiniti G35 (V35). Manual — part 36
DTC P1730 A/T INTERLOCK
AT-135
D
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A
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AT
DTC P1730 A/T INTERLOCK
PFP:00000
Description
NCS000ES
Fail-safe function to detect interlock conditions.
On Board Diagnosis Logic
NCS000ET
●
This is an OBD-II self-diagnostic item.
●
Diagnostic trouble code “P1730 A/T INTERLOCK” with CONSULT-II or 12th judgment flicker without
CONSULT-II is detected when TCM does not receive the 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 Cause
NCS000EU
●
Harness or connectors.
(Solenoid and switch circuit is open or shorted.)
●
Low coast brake solenoid valve.
●
ATF pressure switch 2.
DTC Confirmation Procedure
NCS000EV
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-II
1.
Turn ignition switch ON.
2.
Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T”
with CONSULT-II.
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.
AT-136, "Diagnostic Procedure"
WITH GST
Follow the procedure “WITH CONSULT-II”.
BCIA0031E
AT-136
DTC P1730 A/T INTERLOCK
Judgement of A/T Interlock
NCS000EW
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 detected, the fail-safe function in correspondence with the indi-
vidual 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 revolution sensor malfunction.
A/T INTERLOCK COUPLING PATTERN TABLE
●
: NG, X: OK
Diagnostic Procedure
NCS000EX
1.
CHECK SELF-DIAGNOSTIC RESULTS
With CONSULT-II
1.
Drive vehicle.
2.
Stop vehicle and turn ignition switch OFF.
3.
Turn ignition switch ON.
4.
Select “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
Without CONSULT-II
1.
Drive vehicle.
2.
Stop vehicle and turn ignition switch OFF.
3.
Turn ignition switch ON.
4.
Perform self-diagnosis. Refer to
AT-95, "TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)"
OK or NG
OK
>> GO TO 2.
NG
>> Check low coast brake solenoid valve circuit and function. Refer to
AT-158, "DTC P1774 LOW COAST BRAKE SOLENOID
2.
CHECK DTC
Perform
AT-135, "DTC Confirmation Procedure"
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 3.
Gear position
ATF pressure switch output
Fail-safe
function
Clutch pressure output pattern after fail-safe func-
tion
SW3
(I/C)
SW6
(HLR/
C)
SW5
(D/C)
SW1
(FR/B)
SW2
(LC/B)
I/C
HLR/C
D/C
FR/B
LC/B
L/U
A/T interlock
coupling pat-
tern
3rd
–
X
X
–
●
Held in
2nd gear
OFF
OFF
ON
OFF
OFF
OFF
4th
–
X
X
–
●
Held in
2nd gear
OFF
OFF
ON
OFF
OFF
OFF
5th
X
X
–
X
●
Held in
2nd gear
OFF
OFF
ON
OFF
OFF
OFF
BCIA0031E
DTC P1730 A/T INTERLOCK
AT-137
D
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AT
3.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
AT-172, "MAIN POWER SUPPLY AND GROUND CIR-
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 control valve with TCM. Refer to
AT-225, "Control Valve with TCM and A/T Fluid Temper-
.
NG
>> Repair or replace damaged parts.
AT-138
DTC P1731 A/T 1ST ENGINE BRAKING
DTC P1731 A/T 1ST ENGINE BRAKING
PFP:00000
Description
NCS000EY
Fail-safe function to prevent sudden decrease in speed by engine brake other than at M1 position.
CONSULT-II Reference Value
NCS000EZ
On Board Diagnosis Logic
NCS000F0
●
This is not an OBD-II self-diagnostic item.
●
Diagnostic trouble code “P1731 A/T 1ST E/BRAKING” with CONSULT-II or 13th judgment flicker without
CONSULT-II 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 solenoid monitor value, and detects as irregular when
engine brake of 1st gear acts other than at M1 position.
Possible Cause
NCS000F1
●
Harness or connectors.
(Sensor circuit is open or shorted.).
●
Low coast brake solenoid valve.
●
ATF pressure switch 2.
DTC Confirmation Procedure
NCS000F2
CAUTION:
●
Always drive vehicle at a safe speed.
●
Be careful not to rev engine into the red zone on the tachometer.
NOTE:
If “DTC Confirmation Procedure” has been previously preformed, 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-II
1.
Turn ignition switch ON.
2.
Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II 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-139, "Diagnostic Procedure"
Item name
Condition
Display value
ON OFF SOL
Low coast brake engaged. Refer to
.
ON
Low coast brake disengaged. Refer to
.
OFF
ATF PRES SW 2
Low coast brake engaged. Refer to
.
ON
Low coast brake disengaged. Refer to
.
OFF
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