Infiniti F50. Instruction - page 70
DTC P1730 A/T INTERLOCK
AT-165
D
E
F
G
H
I
J
K
L
M
A
B
AT
Diagnostic Procedure
ECS0086D
1.
SELF-DIAGNOSIS
With CONSULT-II
1.
Start engine.
2.
Select “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
3.
Drive vehicle.
Without CONSULT-II
1.
Drive vehicle.
2.
Stop vehicle and turn ignition switch OFF.
3.
Turn ignition switch “ON”. (Do not start engine.)
4.
Perform self-diagnosis. Refer to
AT-97, "TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)"
.
OK or NG
OK
>> GO TO 2.
NG
>>
●
Check ATF pressure switch. Refer to
AT-219, "DTC P1841 ATF PRESSURE SWITCH 1"
,
AT-
223, "DTC P1843 ATF PRESSURE SWITCH 3"
,
AT-227, "DTC P1845 ATF PRESSURE
SWITCH 5"
,
AT-231, "DTC P1846 ATF PRESSURE SWITCH 6"
.
●
Check each solenoid valves. Refer to
AT-170, "DTC P1752 INPUT CLUTCH SOLENOID
VALVE"
,
AT-179, "DTC P1757 FRONT BRAKE SOLENOID VALVE"
,
AT-188, "DTC P1762
DIRECT CLUTCH SOLENOID VALVE"
,
AT-197, "DTC P1767 HIGH AND LOW REVERSE
CLUTCH SOLENOID VALVE"
,
AT-206, "DTC P1772 LOW COAST BRAKE SOLENOID
VALVE"
.
2.
CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to
AT-159, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 3.
3.
PERFORM TCM INSPECTION
1.
Perform TCM input/output signal inspection.
2.
If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK
>> INSPECTION END
NG
>> Repair or replace damaged parts.
SAT014K
AT-166
DTC P1731 A/T 1ST ENGINE BRAKING
DTC P1731 A/T 1ST ENGINE BRAKING
PFP:00000
Description
ECS0086E
Fail-safe function to prevent sudden decrease in speed by engine brake other than at M1 position.
On Board Diagnosis Logic
ECS0086F
●
This is not an OBD-II self-diagnostic item.
●
Diagnostic trouble code “A/T 1ST E/BRAKING” with CONSULT-II or 13th judgement flicker without CON-
SULT-II is detected under the following condition.
–
When TCM does not receive the proper voltage signal from the sensor.
–
When TCM monitors each pressure switch and solenoid monitor value, and detects as irregular when
engine brake of 1st gear acts other than at M1 position.
Possible Cause
ECS0086G
●
Harness or connectors
(The sensor circuit is open or shorted.)
●
Low coast brake solenoid valve
●
ATF pressure switch 2
DTC Confirmation Procedure
ECS0086H
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF”
and wait at least 10 seconds before conducting the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1.
Turn ignition switch to “ON” position. (Do not start engine.)
2.
Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3.
Start engine.
4.
Maintain the following conditions for at least 2 consecutive sec-
onds.
ENGINE SPEED: 1,200 rpm
Selector lever: “D” position
Gear position: 1st gear
5.
If DTC is detected, go to
AT-168, "Diagnostic Procedure"
.
SAT014K
DTC P1731 A/T 1ST ENGINE BRAKING
AT-167
D
E
F
G
H
I
J
K
L
M
A
B
AT
Wiring Diagram — AT — E/BRE
ECS0086I
TCM terminals and data are reference value. Measured between each terminal and ground.
TCWM0016E
Terminal
No.
Wire
color
Item
Condition
Data (Approx.)
13
W/L
Low coast brake
solenoid valve
When
vehicle
cruises
When the solenoid valve is operating (when running in M1-1
gear or M2-2 gear)
Battery voltage
When the solenoid valve is not operating (when running in “D”)
0V
16
W/G
SEL1 (pressure
switch 2)
–
–
40
Y/G
DATA BIT1
–
–
AT-168
DTC P1731 A/T 1ST ENGINE BRAKING
Diagnostic Procedure
ECS0086J
1.
CHECK INPUT SIGNALS
With CONSULT-II
1.
Start engine.
2.
Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA
MONITOR” mode for “A/T” with CONSULT-II.
3.
Accelerate vehicle in the “D” position (1st gear), and confirm the
ON/OFF actuation of the “ATF PRES SW 2”.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 2.
2.
CHECK HARNESS BETWEEN TCM AND A/T UNIT ASSEMBLY HARNESS CONNECTOR
1.
Turn ignition switch to “OFF” position.
2.
Disconnect TCM connector.
3.
Check continuity between A/T unit assembly harness connector
and TCM connector.
4.
If OK, check harness for short to ground and short to power.
5.
Reinstall any part removed.
OK or NG
OK
>> GO TO 3.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
PCIA0067E
Item
Connector No.
Terminal No.
(Wire color)
Continuity
TCM
F103
13 (W/L)
Yes
A/T unit assembly harness
connector
F27
2 (W/L)
TCM
F103
16 (W/G)
Yes
A/T unit assembly harness
connector
F26
5 (W/G)
TCM
F104
40 (Y/G)
Yes
A/T unit assembly harness
connector
F26
2 (Y/G)
SCIA3095E