TM-9-2320-366-20-2 MTV Unit Maintenance Manual M1083 Series - Volume 2 Download
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Change 1 2-1763 TM 9-2320-366-20-2 Loose or dirty connectors may cause intermittent loss of power to transmission ECU and diagnostic codes to be logged. Ensure that all connectors are clean and tight before performing troubleshooting. Failure to comply may result in incorrect test results. Use care when testing electrical connectors. Do not damage connector pins or sockets with multimeter probes. Failure to comply may result in damage to equipment. CAUTION NOTE Inspect connector pins/sockets for damage, corrosion, and serviceability. Check that connector pins are not pushed back and are capable of making good contact. Main display code 21 needs to be cleared manually from WTEC III transmission ECU after a maintenance task has been performed and before vehicle is returned to service (para 8-5). WTEC III TRANSMISSION ECU RESET CHECK (1) Cycle master power switch to on (TM 9-2320-366-10-1), then to off five times to clear existing throttle count settings. (2) Position master power switch to on (TM 9-2320-366-10-1). (3) Depress accelerator pedal from idle position to full throttle position (TM 9-2320-366- 10-1) to set new 0% and 100% throttle count values in WTEC III transmission ECU. (4) Clear diagnostic code from WTEC III transmission ECU display (para 8-5). (5) If main code 21 does not reappear, electrical communication between WTEC III transmission ECU and TPS may be faulty. If main code 21 reappears, TPS may be faulty. (6) Position master power switch to off (TM 9-2320-366-10-1).