Firebird V6-3.8L VIN K (1995)
"ON" and engine "OFF," P/N will be indicated. When transmission electrical connector is disconnected, the ground potential for the three range signals
to the PCM will be removed, and with ignition "ON," D2 will be indicated.
DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
3. This test checks the indicated range signal to the manual valve position actually selected.
4. This test checks for correct voltage from the PCM to the transmission external connector.
5. This test checks for a short to ground from the PCM to the transmission external connector in any one of the three circuits.
DIAGNOSTIC AIDS
Refer to accompanying chart for various A/B/C range combinations. Check all wiring connectors for proper terminal tension. For current DTC P1810,
range signal will default to "D4" while A/B/C range values continue to read actual "TR Pressure Switch" output for each range selection.
Refer to Pressure Switch Assembly Resistance Check See: Pressure Switch Assembly Resistance Check or Functional Test Procedure. See:
Transmission Control Systems/Testing and Inspection
If circuit 1225 is open, 4th gear is inhibited, no code will set and no Malfunction Indicator Lamp (MIL) illumination.
