95 1/2 Model

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




Circuit Description
- The Throttle Position Sensor (TPS) provides a voltage signal that changes relative to the Throttle Plate position. Signal voltage between Connector A-64 Terminals C5 and C6 will vary from about 0.4 at idle to about 4.6 volts at Wide Open Throttle.
- The Engine Control Module (ECM) also receives this signal. This TPS is a variable resistance with one side (Connector E-11 Terminal 2) connected only to the ECM Connector to have the 5.0 volts supply voltage. The other side (Connector E-11 Terminal 1) is connected to the Transmission Control Module (TCM) (floating ground) and the ECM (ground). The "middle" (the wiper) (Connector E-11 Terminal 3) is connected to the TCM and the ECM.
- The ECM monitors output voltage from the TPS and determines Fuel delivery based on Throttle Valve angle (driver demand).
- This TPS is an electrical component and must not be soaked in any liquid cleaner or solvent, as damage may result.

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

- Detection Conditions:
a. This detects the Terminals C5 and C6 open or the Connector E-11 open.
b. Throttle Valve opening more than 42%.
c. Engine speed less than 2200 rpm.
d. Vehicle speed less than 3 Km/h.
e. No DTC: Engine Speed DTC 13, Output Speed DTC 11. Downshift Protection DTC 62.
f. Only with Selector Lever in Park or Neutral.
g. The detection is authorized only during the 6 seconds after Ignition Switch is "ON".
h. The conditions need to be present for at least 3 seconds.

- Action After The Detection Time:
- Backup Mode.

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





DTC 21 / Flow Chart