P0703

DTC P0703:

TCC Wiring Schematic:

CIRCUIT DESCRIPTION
The Powertrain Control Module (PCM) monitors the status of the Torque Converter Clutch (TCC) brake switch circuit through PCM terminal "BA5".

DIAGNOSTIC TROUBLE CODE (DTC) P0703 WILL SET WHEN
^ No DTC P0703 is present.
^ Vehicle speed has been above 35 mph for 10 seconds and back to 0 mph five times.
^ TCC brake switch status has not changed from "Released" to "Applied," or "Applied" to "Released" as displayed on the Tech 1.

ACTION TAKEN (PCM WILL DEFAULT TO)
When DTC P0703 is set, the PCM will not allow 4th gear, cruise control or TCC operation. DTC PO703 does not illuminate the Malfunction Indicator Lamp (MIL) (Service Engine Soon).

DIAGNOSTIC AIDS
An intermittent may be caused by a poor connection, rubbed through wire insulation or a wire broken inside the insulation.

Check For:

Poor Connection or Damaged Harness
Inspect PCM harness connectors for backed out terminals, mating, broken locks, improperly formed or damaged terminals, poor terminal to wire connection and damaged harness.

Intermittent Test
Monitor a Tech 1 while moving related connectors and wiring harness. If the failure is induced, the scan data will change from "Released" to "Applied," or "Applied" to "Released." This may help to isolate the location of the malfunction.