AT-518
[RE5F22A]
DTC P0734 A/T 4TH GEAR FUNCTION
Revision: November 2006
2006 Altima
DTC P0734 A/T 4TH GEAR FUNCTION
PFP:31940
Description
ECS009FD
●
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 fourth 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
ECS009FE
●
This is an OBD-II self-diagnostic item.
●
Diagnostic trouble code “A/T 4TH GR FNCTN” with CONSULT-II or P0734 without CONSULT-II is
detected when A/T cannot be shifted to the 4th gear position even if electrical circuit is good.
Possible Cause
ECS009FF
●
Shift solenoid valve A
(On stick.)
●
Shift solenoid valve B
(On stick.)
●
Shift solenoid valve C
(On stick.)
●
Pressure control solenoid valve A
(On stick.)
●
Forward and direct clutch assembly
●
U/D clutch
●
U/D brake
●
2nd coast brake
●
One-way clutch No.1
●
Hydraulic control circuit
DTC Confirmation Procedure
ECS009FG
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 10 consecutive seconds.
SLCT LVR POSI: “D” position
GEAR: 4th position
Gear position
Shift solenoid valve
A
B
C
D
E
4th
D
OFF (Open)
OFF (Closed)
OFF (Closed)
ON (Closed)
OFF (Closed)
M4
OFF (Open)
OFF (Closed)
OFF (Closed)
ON (Closed)
OFF (Closed)
BCIA0030E
