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P0891-TRANSMISSION RELAY ALWAYS ON (CONTINUED) For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - For a complete wiring diagram Refer to Section 8W. • When Monitored: 9 OFF 9 position to 9 RUN 9 position and/or the ignition is turned from 9 START 9 position to 9 RUN 9 position. • Set Condition: 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 POWERTRAIN CONTROL MODULE Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS- Theory of Operation The Transmission Control Relay is used to supply power (Transmission Control Relay Output) to the Transmission After a PCM reset, (ignition switch turned to the run position, or after cranking engine) the PCM verifies that the Diagnostic Test 1. CHECK TO SEE IF DTC P0891 IS CURRENT With the scan tool, check the STARTS SINCE SET counter. 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 21 - 206 AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS WK |