P0730

P0730-INCORRECT GEAR RATIO

For a complete wiring diagram Refer to the Wiring Information.

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. Initial Inspection and Diagnostic Overview

1. CHECK FOR ENGINE CAM OR CRANK SENSOR DTCs
1. With the scan tool, read transmission DTCs.

Is the DTC P0717-Input Speed Sensor 1 Circuit No Signal also present?

Yes

- Go to and perform diagnostics for P0717.

No

- Go to 2

2. REPAIR INTERNAL TRANSMISSION
1. This DTC indicates an internal transmission problem.
2. Check for the following possible causes but not limited to these:
- Step motor
- Shift Valve sticking
- CVT Belt slipping
- Hydraulic control circuit including the Valve Body

Repair

- Replace or repair the CV Transmission. Removal
- Perform CVT TRANSMISSION VERIFICATION TEST. CVT Transmission Verification Test