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• When Monitored: • Set Condition: Possible Causes (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT OPEN (T13) SPEED SENSOR GROUND CIRCUIT OPEN (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO GROUND (T13) SPEED SENSOR GROUND CIRCUIT SHORT TO GROUND (T52) INPUT SPEED SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE (T13) SPEED SENSOR GROUND CIRCUIT SHORT TO VOLTAGE INPUT SPEED SENSOR TRANSMISSION CONTROL MODULE Always perform the 45RFE/545RFE Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to Theory of Operation The transmission system uses two speed sensors, one to measure input RPM and one to measure output RPM. 1) When in gear, if the gear ratio does not compare to a known gear ratio, the corresponding in-gear trouble code 2) An excessive change in input or output speeds indicating signal intermittent which may result in the DTCs P0715 3) If the common speed sensor ground circuit is lost, both sensor inputs will read the signal from the input speed Diagnostic Test 1. CHECK IF DTC P0715 IS CURRENT Start the engine in park. With the scan tool, monitor the Input Speed Sensor RPM. Is the Input Speed Sensor RPM below 400 RPM? Yes >> Go To 2 No >> Go To 9 21 - 464 AUTOMATIC TRANSMISSION 545RFE - ELECTRICAL DIAGNOSTICS - (DIESEL) KJ |