DTC 117

DTC 117 Chart:

Shift "A" & "B" Solenoid Circuit:

Solenoid "A" & "B" Combination Chart:

CIRCUIT DESCRIPTION
The two identical, normally open shift solenoids (references to as "A" and "B") are used for controlling, upshifts and downshifts in all forward gear ranges. These shift solenoids work together in a combination of "ON and "OFF" sequences to control fluid that is routed to the 1-2 shift valve, 2-3 shift valve and 3-4 shift valve. The PCM monitors numerous inputs and determines the appropriate gear for the vehicle by commanding the solenoids either "ON" or "OFF." Fluid pressure is then routed to the shift valves (or exhausted through the solenoids) in order to change the position of a valve and hydraulically enable a gear change.

DTC 117 WILL SET WHEN
- "Closed Loop" fuel control is enabled.
- Shift "A" or shift "B" output is different than what is commanded for 10 consecutive times.

ACTION TAKEN (PCM WILL DEFAULT TO)
With a current DTC 117 set, the PCM will illuminate the Malfunction Indicator Lamp (MIL) (Service Engine Soon).

DTC 117 WILL CLEAR WHEN
The fault no longer exists.

DTC CHART TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.

1. This test checks the electrical operation of the "A" solenoid.
2. This test checks the power feed circuit.
3. This test checks the electrical operation of the "B" solenoid.
4. This test checks the PCM's ability to ground the circuit.
5. This test checks the power feed circuit.
6. This test checks the PCM's ability to ground the circuit.

DIAGNOSTIC AIDS
This test monitors the shift "A" and shift "B" outputs from the PCM and increments a counter when the output is different than what is commanded.