Nissan Altima 2007-2012 Service Manual: Inspection and adjustment
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
Precaution for TCM and CVT Assembly Replacement
CAUTION: • Check if new data (Unit ID) are entered correctly after replacing CVT assembly and erasing data in TCM. (Connect CONSULT-III, and then turn ignition switch OFF.) • When replacing CVT assembly or TCM, refer to the pattern table below and erase the EEPROM in the TCM if necessary.
EEPROM ERASING PATTERNS
METHOD FOR ERASING THE EEPROM IN THE TCM
1. Turn ignition switch ON.
2. Move selector lever to “R” position.
3. Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.
4. Press the brake pedal and turn the brake switch ON.
5. Press the accelerator pedal (0.5/8 - 4/8 throttle) not to exceed the half, and hold it in the half or less open position. (This will set the closed throttle position signal to OFF and the wide open throttle position signal to OFF.) 6. Perform “ERASE”.
7. Wait 3 seconds and then release the accelerator pedal.
8. Turn ignition switch OFF.
METHOD FOR WRITING DATA FROM THE ROM ASSEMBLY IN THE TRANSAXLE
In the following procedure, the TCM reads data from the ROM assembly and writes it to the EEPROM in the TCM.
1. Erase the EEPROM in the TCM.
2. Move selector lever to “P” position.
3. Turn ignition switch ON.
CHECK METHOD
• Standard: About 2 seconds after the ignition switch ON, the CVT indicator lamp lights up for 2 seconds.
• Non-standard: Even after the ignition switch ON, the CVT indicator lamp does not light up after 2 seconds or illuminates immediately.
CAUTION: Perform in the “P” or “N” position.
Action for Non-standard
• Replace the CVT assembly.
• Replace the TCM.
Diagnosis and repair workflow
Work Flow
INTRODUCTION
The TCM receives a signal from the vehicle speed sensor, PNP switch and
provides shift control or lock-up
control via CVT solenoid valves.
The TCM also communicates wit ...
Other materials:
Engine control system QR25DE except for california
Basic inspection
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow
OVERALL SEQUENCE
DETAILED FLOW
1.GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the
condition and the environment when
the incident/malfunction occurred) using the “Diagnostic Work S ...
B2603 shift position status
Description
BCM confirms the shift position with the following 2 signals.
• CVT selector lever
• P/N position switch
DTC Logic
DTC DETECTION LOGIC
NOTE:
• If DTC B2603 is displayed with DTC U1000, first perform the trouble diagnosis
for DTC U1000. Refer to
SEC-36, "DTC Logic& ...
P0441 Evap control system
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P0441 is displayed with other DTC such as P2122, P2123, P2127, P2128 or
P2138, first perform
trouble diagnosis for other DTC.
In this evaporative emission (EVAP) control system, purge flow occurs during
non-closed throttle conditions.
Purge vo ...