Inspection Procedure 5: Gears cannot be shifted at all, or a certain gear shift (1st to 2nd, 2nd to 3rd, etc.) is not made

INSPECTION PROCEDURE 5: Gears cannot be shifted at all, or a certain gear shift (1st to 2nd, 2nd to 3rd, etc.) is not made.

TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CONDITION:)
^ Non-genuine device installation: TCM voltage drop
^ Improper fixing of the electric wiring, poor insertion of the connector, poor contact of the inside PIN
^ Poor adjustment of transmission range switch
^ Failure of the transmission range switch main unit
^ Malfunction of the TCM
^ TCM power supply or ground failure
^ A/T failure: Hydraulic system (valve body assembly), driving force transmission system (clutch/brake)

DIAGNOSIS

STEP 1. Check the electrical equipment.

Q:Is the non-genuine electrical equipment (car navigator, audio devices, etc.) installed?
YES: Remove the power supply wiring and signal lines of the equipment.
NO: Go to Step 2

STEP 2. Check the electric system.
Check if there is an improper fixing of the electric wiring, poor insertion of the connector, and poor contact.

Q:Is the check result normal?
YES: Go to Step 3.
NO: Adjust and repair.

STEP 3. Check and adjust the transmission range switch.
If the transmission range switch has a failure, replace it, and then check the trouble symptom again.

Q:Is the check result normal?
YES: The procedure is complete.
NO: Go to Step 4.

STEP 4. Check the TCM power supply and ground.

Q:Is the check result normal?
YES: Go to Step 5.
NO: Repair the wiring.

STEP 5. Replace the TCM.

Q:Is the failure resolved?
YES: The procedure is complete.
NO: Go to Step 6.

STEP 6. Remove the transaxle assembly from the vehicle.
Disassemble and check the transaxle assembly to check if there is a foreign material inside.

Q:Is the check result satisfactory?
YES: Replace the transaxle assembly.
NO: Replace the failure part.