DTC P0731 A/T 1ST GEAR FUNCTION
AT-503
[RE5F22A]
D
E
F
G
H
I
J
K
L
M
A
B
AT
Revision: November 2006
2006 Altima
DTC P0731 A/T 1ST GEAR FUNCTION
PFP:31940
Description
ECS009EV
●
This malfunction will not be detected while the A/T CHECK indicator lamp is indicating another self-diag-
nosis malfunction.
●
This malfunction is detected when the A/T does not shift into first gear position as instructed by the TCM.
This is not caused by electrical malfunction (circuits open or shorted) but by mechanical malfunction such
as control valve sticking, improper solenoid valve operation, etc.
On Board Diagnosis Logic
ECS009EW
●
This is an OBD-II self-diagnostic item.
●
Diagnostic trouble code “A/T 1ST GR FNCTN” with CONSULT-II or P0731 without CONSULT-II is
detected when A/T cannot be shifted to the 1st gear position even if electrical circuit is good.
Possible Cause
ECS009EX
●
Shift solenoid valve A
(Off stick.)
●
2nd brake
●
2nd coast brake
●
One-way clutch No.1
●
One-way clutch No.2
●
Hydraulic control circuit
DTC Confirmation Procedure
ECS009EY
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 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.
Start engine and select “A/T” with “DATA MONITOR” mode in
CONSULT-II.
2.
Make sure that ATF temperature is within the range below.
FLUID TEMP: More than 20
°
C (68
°
F)
If out of range, drive the vehicle to warm up the fluid.
3.
Accelerate vehicle to maintain the following conditions for at
least 12 consecutive seconds.
SLCT LVR POSI: “D” position
GEAR: 1st position
[Vehicle speed and accelerator angle: 1st gear position
retainable condition. (Refer to
WHEN SHIFTING GEARS - 9J500 MODELS"
.)]
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
4.
If DTC is detected, go to
AT-505, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “With CONSULT-II”.
Gear position
Shift solenoid valve
A
B
C
D
E
1st
D
ON (Closed)
ON (Open)
ON (Open)
OFF (Open)
OFF (Closed)
M1
ON (Closed)
ON (Open)
ON (Open)
OFF (Open)
ON (Open)
BCIA0030E