Infiniti FX35, FX50 (S51). Manual — part 1825
P1730 INTERLOCK
TM-107
< DTC/CIRCUIT DIAGNOSIS >
[7AT: RE7R01A (VQ35HR)]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
P1730 INTERLOCK
Description
INFOID:0000000005250093
Fail-safe function to detect interlock conditions.
DTC Logic
INFOID:0000000005250094
DTC DETECTION LOGIC
NOTE:
When the vehicle is driven fixed in second gear, a input speed sensor malfunction is displayed, but
this is not a input speed sensor malfunction.
DTC CONFIRMATION PROCEDURE
CAUTION:
• “
” must be performed before starting “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” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting 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
NO
>> INSPECTION END
Judgment of A/T Interlock
INFOID:0000000005250095
.
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 and brake
• Hydraulic control circuit
SLCT LVR POSI
: D
GEAR
: 1st through 7th
TM-108
< DTC/CIRCUIT DIAGNOSIS >
[7AT: RE7R01A (VQ35HR)]
P1730 INTERLOCK
Diagnosis Procedure
INFOID:0000000005250096
1.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
Is the inspection result normal?
YES
>> Replace A/T assembly. Refer to
(2WD),
(AWD).
NO
>> Repair or replace damaged parts.
P1734 7GR INCORRECT RATIO
TM-109
< DTC/CIRCUIT DIAGNOSIS >
[7AT: RE7R01A (VQ35HR)]
C
E
F
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H
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M
A
B
TM
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P
P1734 7GR INCORRECT RATIO
Description
INFOID:0000000005250097
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 shorted) but by mechanical malfunction such as control
valve sticking, improper solenoid valve operation, etc.
DTC Logic
INFOID:0000000005250098
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
• “
” must be performed before starting “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” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting 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” of “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:
• 0.818 or more
• 0.728 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)
TM-110
< DTC/CIRCUIT DIAGNOSIS >
[7AT: RE7R01A (VQ35HR)]
P1734 7GR INCORRECT RATIO
3.
Keep the current driving status for 2 seconds or more if CONSULT-III screen changes from “OUT OF
CONDITION” to “TESTING”.
CAUTION:
When “TESTING” is not detected on CONSULT-III for a long time, check “Self Diagnostic Results”
in “TRANSMISSION”. When a DTC other than “P1734” is detected, check the DTC. Refer to
.
With GST
1.
Drive vehicle and maintain the following conditions for 2 seconds or more.
2.
Check DTC.
Is “OUT OF CONDITION”, “STOP VEHICLE” or “COMPLETED RESULT NG” displayed? / Is “P1734”
detected?
YES-1 >> “OUT OF CONDITION”: Perform “Step 3” again.
YES-2 >> “STOP VEHICLE”: GO TO 4.
YES-3 >> “COMPLETED RESULT NG”: Go to
YES-4 >> “P1734” is detected: Go to
.
NO
>> GO TO 4.
4.
CHECK SYMPTOM (PART 2)
1.
Stop vehicle.
2.
Drive vehicle in “D” position allowing it to shift from 1GR to 7GR and check shift timing and shift shock.
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005250099
1.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
Is the inspection result normal?
YES
>> Replace A/T assembly. Refer to
(2WD),
(AWD).
NO
>> Repair or replace damaged parts.
GEAR
: 7th
ACCELE POSI
: 0.7/8 or more
VEHICLE SPEED
: 10 km/h (7 MPH) or more
Selector lever
: “M” position
Gear position
: 7th
Accelerator pedal opening
: 0.7/8 or more
Vehicle speed
: 10 km/h (7 MPH) or more
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