94-95 Model

This Diagnostic Trouble Code (DTC) flashes the "CHECK TRANS" Indicator and sets the Backup Mode.




Circuit Description
The Ignition Module sends a signal to the Transmission Control Module (TCM) that indicates Engine speed in rpm. The Engine Control Module (ECM) also receives this signal. When the Vehicle is in Neutral Gear and the Engine is at idle, the Engine speed should be approximately 800 rpm.


Diagnostic Aids
- This diagnostic test is not an electrical test done by the TCM but a test between different information ("logic test").

- Detection Conditions:
a. Engine Speed less than or equal to 200 rpm.
b. Output Speed more than 1024 rpm.
c. Acceleration more than 2 Km/h/s.
d. No DTC: Output Speed DTC 11, Downshift Protection DTC 62 or Mode Switch Illegal Position DTC 54.
e. Selector Lever not in Park or Neutral.
f. The conditions need to be present for at least 0.5 seconds.

- Action After The Detection Time:
- Backup Mode.

- Recovery Conditions:
- To recover do an Ignition Cycle.





DTC 13 / Flow Chart