P0730

The Powertrain Control Module (PCM) calculates gear ratio based on the transaxle input and output speeds The PCM/TCM compares the known transaxle gear ratio to the calculated ratio for the selected gear range. when the PCM detects an unknown transaxle gear ratio, then the DTC P0730 sets. DTC P0730 is a type C DTC.

DTC PARAMETERS
One of the following conditions occurs for 7 seconds
^ The gear ratio is greater than 3.13:1.
^ The gear ratio is between 2.23:1 and 2.87:1.
^ The gear ratio is between 1.71:1 and 2.02:1.
^ The gear ratio is between 1.07:1 and 1.54:1.
^ The gear ratio is between 0.72:1 and 0.91:1.
^ The gear ratio is less than 0.61:1.

when the following conditions have been met:
^ Engine is running
^ TPS greater than 15%
^ Vehicle speed greater than 8 km/h (5 mph)
^ TFP switch assembly does not equal PARK or NEUTRAL
^ Time since last manual range change greater than 6 seconds.
^ No throttle position codes
^ No input speed sensor codes
^ No output speed sensor codes
^ No TFP switch assembly code
^ Trans fluid temperature is greater than 21°C (70°F)

DIAGNOSTIC AIDS
^ Check for improper transaxle operation per the chart.
^ Check for an incorrect calibration.