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DTC 2-3-2 850

posted by  tmannian on  Wed Nov 10 09:30 CST 2010
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last visit: Sat Sep 20 10:31 CST 2014
[RELATED]

Diagnostic trouble code (DTC) information 2–3–2

Condition

The combined instrument supplies vehicle speed information to the transmission control module TCM. The signal is a variable–frequency uniform square wave where the frequency increases as the road speed increases. The TCM uses the signal to determine whether the transmission changes gear at the proper speeds. The TCM also uses the RPM sensor sensor to determine vehicle speed. If the TCM registers an excessive deviation in the vehicle speed signal from the combined instrument compared to the TCM calculated speed, DTC 2–3–2 is set.


Substitute value
Control Module GROUP I:
The transmission control module TCM "Emergency mode" program has been initiated.
Control Module GROUP II:
The transmission control module (TCM) "Emergency mode II" program is initiated.


Possible source

-Break in signal wiring circuit
-Short circuit to supply or ground in the signal wiring.
-Malfunction in combined instrument
-Malfunction vehicle speed sensor VSS circuit.
-Contact resistance in connections.


Fault symptom[s]
-Rough gear shifting due to maximum system pressure in the transmission
-No reduction of engine torque
-No Lock–Up operational.

--
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