P0730-INCORRECT GEAR RATIO

For a complete wiring diagram Refer to Section 8W.

Theory of Operation

The Transmission Control Module controls the gear ratio by the use of a Step motor that transfers electrical power to mechanical movement. The rationality is a continuous test that monitors the Step motor movement. If the Step motor is stuck at a certain position, the estimated ratio is increased or decreased continuously by the feedback value of the primary pulley speed difference. When the difference between the estimated and actual primary pulley speed has reached 1000 rpm, a DTC will set.

• When Monitored:

Ignition on, engine running with the transmission in a valid forward gear.

System voltage between 9.0 and 16.0 volts.

Accelerator Pedal Position (APP) greater than 12.5% with an engine rpm greater than 450 rpm.

Vehicle speed greater than 10 Km/h (6 mph).

Transmission fluid temperature greater than 20° C (68° F).

No active DTCs from the following:

• Step Motor
• Transmission Temperature Sensor
• Transmission Range Sensor
• Line Pressure Solenoid
• Input or Output Speed Sensor
• Primary or Secondary Pressure Sensor
• Over Temperature

• Set Condition:

  If the difference between the transmission estimated pulley speed and the measured primary pulley speed is greater than 1000 rpm (belt slipping) for the continuous period of 5.0 seconds.

Always perform the CVT Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)