CIRCUIT DESCRIPTION:
The TCM requires input battery voltage which originates direct from the vehicle battery and runs through a 10 amp fuse to TCM pins 10 (wire 110) and 70 (wire 170).
DTC P0883 sets when the TCM detects the following:
12V TCM – Battery direct voltage is above 16 volts for a calibrated time.
24V TCM – Battery direct voltage is above 32 volts for a calibrated time.
ACTION TAKEN WHEN THE DTC SETS:
1. Hydraulic default is commanded. Shift selector position and hydraulic state of logic valves determine range.
2. The CHECK TRANS light illuminates (non-OBD II strategy).
3. The TCM forces Variable Modulated Main off.
4. The TCM inhibits Torque Converter Clutch (TCC) engagement.
CONDITIONS FOR CLEARING THE DTC:
Use the diagnostic tool to clear the DTC from the TCM history. The TCM automatically clears the DTC from the TCM history if the vehicle completes 40 warm-up cycles without the DTC recurring.
DIAGNOSTIC AIDS:
The following procedures are not documented in any OEM procedures or in any OEM Troubleshooting or Service information and should not be used as a method to diagnose any transmission DTCs, function, or shift quality concern:
1. Back-probing any connections used for transmission features or functions may damage and/or unlock terminals from the back-probed connector creating permanent or intermittent shorts and/or open circuits. If possible, use the J-39700 Breakout Box, the appropriate harness adapters, and appropriate magnetic overlays to troubleshoot the vehicle.
2. Load-testing any transmission-related circuits with any other electrical devices such as vehicle lamps or relays, especially with the TCM connected to the harness. Use J-39700 Breakout Box and appropriate harnesses with the diagnostic tool to monitor the circuit performance in question unless otherwise specified in the various Troubleshooting information.
3. Piercing a wire to check for voltages, shorts-to-grounds or other wires anywhere in the circuit but especially at the TCM. This creates a leak path for moisture and damages the wire and insulation.
4. This DTC normally sets due to vehicle charging system concerns. Verify the concern and contact OEM for further repair details.
NOTE: OEM does not warranty charging system concerns.
