Diagnostic Procedure

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK INPUT SIGNAL

With CONSULT-III

Start engine.
Select "MAIN SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.

Start vehicle and read out the value of "SEC PRESS".

SEC PRESS DISPLAY VALUE

Item name	Condition	Display value (Approx.)
SEC PRESS	"N" position idle	0.5 - 0.9 MPa

OK or NG

OK: GO TO 5.

NG: GO TO 2.

CHECK LINE PRESSURE
Perform line pressure test. Refer to "LINE PRESSURE TEST ".

Fig 1: Checking Line Pressure
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 3.

NG: Repair or replace damaged parts. Refer to "JUDGEMENT OF LINE PRESSURE TEST ".
DETECT MALFUNCTIONING ITEM
Check the following:
- Pressure control solenoid valve B (Secondary pressure solenoid valve). Refer to "COMPONENT INSPECTION ".
- Pressure control solenoid valve A (Line pressure solenoid valve). Refer to "COMPONENT INSPECTION ".
OK or NG

OK: GO TO 4.

NG: Repair or replace damaged parts.
CHECK TRANSMISSION FLUID PRESSURE SENSOR A (SECONDARY PRESSURE SENSOR) SYSTEM
Check transmission fluid pressure sensor A (secondary pressure sensor) system. Refer to "DTC P0840 TRANSMISSION FLUID PRESSURE SENSOR A CIRCUIT (SEC PRESSURE SENSOR) ".

OK or NG

OK: GO TO 5.

NG: Repair or replace damaged parts.
DETECT MALFUNCTIONING ITEM
Check the following:
- Power supply and ground circuit for TCM. Refer to "WIRING DIAGRAM - CVT - POWER ".
- The TCM pin terminals for damage or loose connection with harness connector.
OK or NG

OK: GO TO 6.

NG: Repair or replace damaged parts.
CHECK DTC
Perform "DTC Confirmation Procedure". Refer to "DTC CONFIRMATION PROCEDURE ".

OK or NG

OK: INSPECTION END

NG: Replace the transaxle assembly. Refer to "REMOVAL AND INSTALLATION ".