P0730

P0730 INCORRECT GEAR RATIO

Description

- TCM detects a high-rpm state of the under drive sun gear.
- The number of revolutions of the under drive sun gear is calculated with the input speed sensor 1 and 2.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


CAUTION:
- " "Diagnosis Procedure" " must be performed before starting "DTC CONFIRMATION PROCEDURE".
- Never perform "DTC CONFIRMATION PROCEDURE" before completing the repair, which may cause secondary malfunction.
- Always drive vehicle at a safe speed.

1. PRECONDITIONING

If "DTC CONFIRMATION PROCEDURE" is previously conducted, always turn ignition switch OFF and wait at least 10 seconds before performing the next test.
- GO TO 2.

2. CHECK DTC DETECTION

With CONSULT
1.Start the engine.
2.Select "Self Diagnostic Results" in "ENGINE".
3.Drive vehicle under the similar conditions to (1st trip) Freeze Frame Data for 10 minutes. Refer to the table below.
Hold the accelerator pedal as steady as possible.





With GST
Follow the procedure "With CONSULT".
Is "P0730" detected?
YES- Go to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK INTERMITTENT INCIDENT

Refer to "Intermittent Incident" Intermittent Incident.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace damaged parts.

2. DETECT MALFUNCTIONING ITEM

Disassemble the A/T assembly to check component parts. Refer to "Disassembly" Disassembly.
NOTE:
Check the component parts, referring to "Possible cause" in "DTC DETECTION LOGIC". Refer to "DTC Logic" .
Is the inspection result normal?
YES- Replace control valve & TCM. Refer to "Removal and Installation" Removal and Installation.
NO- Repair or replace damaged parts.