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Fault Description : Rotary switch position, signal invalid. ODB II Monitoring condition : Start engine. Operate gear selector through all ranges. Possible Cause : Rotary switch to TCM “position code XYZ” circuit: open circuit or short circuit to ground Rotary switch failure. Rotary switch “not in P or N”, signal during starting. Start engine. Rotary switch incorrect adjustment, Gear selector / rotary switch not in P or N Rotary switch to TCM “position code Z” circuit: short circuit to ground Rotary switch failure. Fluid temperature sensor circuit. low voltage or fluid temperature, < -58º F (-50º C). Run engine from cold to normal. operating temperature. Transmission internal harness temp. sensor. signal circuit: short circuit to ground, Transmission to TCM harness temp. sensor signal circuit: short circuit to ground Temperature sensor failure. Fluid temperature sensor circuit. high voltage or fluid temperature. > 365º F (185º C). Run engine from cold to normal, operating temperature. High transmission operating temperature. (Look for burned transmission fluid). Transmission internal harness temp. sensor signal circuit: open circuit or short circuit to B+ voltage Transmission to TCM harness temp. sensor signal circuit: open circuit or short circuit to B+ voltage Temperature sensor failure. Output speed sensor, signal out of range (high). Drive vehicle and accelerate to force downshifting. Transmission internal harness output speed, short circuit to ground or B+ voltage Transmission to TCM harness output speed sensor circuit: intermittent open circuit or short circuit to ground or B+ voltage Intermittent speed sensor failure.
Tags : zf transmission, odb ii, trouble diagnosis, obd ii, switch failure, rotary switch, fault description, starting start, fluid transmission, sensor circuit, output speed, signal circuit, sensor signal, fluid temperature, voltage transmission
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