2008 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Input/Output Signal of TCM

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
INPUT/OUTPUT SIGNAL OF TCM

Control item Line pressure control Vehicle speed control Shift control Lock-up control Engine brake control Fail-safe function(3) Self-diagnostics function
Input Accelerator pedal position signal(5) X X X X X X X
Vehicle speed sensor A/T (revolution sensor) X X X X X X X
Vehicle speed sensor MTR(1)(5)           X  
Closed throttle position signal(5)   X(2) X X   X X(4)
Wide open throttle position signal(5)           X X(4)
Turbine revolution sensor 1   X   X X X X
Turbine revolution sensor 2 (for 4th speed only)   X   X X X X
Engine speed signals(5) X X X X X X X
Stop lamp switch signal(5)   X X X     X(4)
A/T fluid temperature sensors 1, 2 X X X X   X X
ASCD Operation signal(4)   X X X      
Overdrive cancel signal(5)   X          
Output Direct clutch solenoid (ATF pressure switch 5)   X X     X X
Input clutch solenoid (ATF pressure switch 3)   X X     X X
High and low reverse clutch solenoid (ATF pressure switch 6)   X X     X X
Front brake solenoid (ATF pressure switch 1)   X X     X X
Low coast brake solenoid (ATF pressure switch 2)   X X   X X X
Line pressure solenoid X X X X X X X
TCC solenoid       X   X X
Self-diagnosis table(6)             X
Starter relay           X X
(1) Spare for vehicle speed sensor.A/T (revolution sensor)
(2) Spare for accelerator pedal position signal
(3) If these input and output signals are different, the TCM triggers the fail-safe function.
(4) Used as a condition for starting self-diagnosis; if self-diagnosis are not started, it is judged that there is some kind of error
(5) Input by CAN communications
(6) Output by CAN communications
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.