P0883-TCM POWER INPUT HIGH





For a complete wiring diagram Refer to Section 8W.

Theory of Operation


The Transmission Control Relay is used to supply power (Transmission Control Relay Output) to the Transmission Solenoid/TRS Assembly when in normal operating mode and to pins C4–19, C4–28 and C4–38 of the PCM. The purpose of the Transmission Control Relay is to allow the PCM to turn off the power to the Transmission Solenoid/TRS Assembly in event that the transmission should need to be placed into “limp-in” mode due to a DTC.

After a TCM reset, (ignition switch turned to the run position, or after cranking engine) the TCM verifies that the Transmission Control Relay contacts are open by checking for voltage on the Transmission Control Relay Output circuit before the Transmission Control Relay is energized. If voltage is detected, the DTC will set.


  • When Monitored:

    When the ignition is turned from "OFF" position to "RUN" position and/or the ignition is turned from "START" position to "RUN" position.

  • Set Condition:

    This DTC is set if the Transmission Control Module senses greater than 3.0 volts on the Transmission Control Relay Output circuits prior to a request from the TCM to energize the Transmission Control Relay.


Possible Causes
  
(T15) TRANSMISSION CONTROL RELAY CONTROL CIRCUIT SHORT TO VOLTAGE
  
(T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT SHORT VOLTAGE
  
TRANSMISSION CONTROL RELAY
  
TRANSMISSION SOLENOID/TRS ASSEMBLY
  
TRANSMISSION CONTROL MODULE
  

Always perform the 45RFE/545RFE Pre-Diagnostic Troubleshooting Procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)



Diagnostic Test

1.CHECK TO SEE IF DTC P0883 IS CURRENT


NOTE: This counter only applies to the last DTC set.



Is the STARTS SINCE SET counter set to 0?

Yes
  • Go To 2


No
  • Go To 6

2.CHECK THE TRANSMISSION CONTROL RELAY







Is the resistance above 5.0 ohms?

Yes
  • Go To 3


No

3.CHECK THE (T16) TRANSMISSION RELAY OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE






Is the voltage above 0.5 volts?

Yes
  • Go To 4


No
  • Go To 5

4.CHECK THE TRANSMISSION SOLENOID/TRS ASSEMBLY








Is the voltage above 0.5 volts?

Yes


No

5.CHECK THE (T15) TRANSMISSION CONTROL RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE










Is the voltage above 0.5 volts?

Yes


No
  • Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM per the Service Information. With the scan tool, perform QUICK LEARN.
  • Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)

6.CHECK WIRING AND CONNECTORS






Where there any problems found?

Yes


No
  • Test Complete.