Inspection Procedure 5: Gears cannot be shifted at all, or a certain gear shift (1st to 2nd, 2nd to 3rd, etc.) is not made.
PROBABLE CAUSES
- Non-genuine device installation: A/T-ECU voltage drop
- Improper fixing of the electric wiring, poor insertion of the connector, poor contact of the inside PIN
- Poor adjustment of inhibitor switch
- Failure of the inhibitor switch main unit
- Malfunction of the A/T-ECU
- A/T-ECU power supply or earth failure
- A/T failure: Hydraulic system (valve body assembly), driving force transmission system (clutch/brake)
DIAGNOSIS PROCEDURE |
STEP 1. Check the electrical equipment. |
Q.
Is the non-genuine electrical equipment (car navigator, audio devices, etc.) installed?
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Remove the power supply wiring and signal lines of the equipment. |
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Go to Step 2 |
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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?
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Go to Step 3. |
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Adjust and repair. |
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STEP 3. Check and adjust the inhibitor switch. |
Refer to ,. |
If the inhibitor switch has a failure, replace it, and then check the trouble symptom again. |
Q.
Is the check result normal?
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The procedure is complete. |
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Go to Step 4. |
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STEP 4. Check the A/T-ECU power supply and earth. |
Q.
Is the check result normal?
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Go to Step 5. |
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Repair the wiring. |
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STEP 5. Replace the A/T-ECU. |
Q.
Is the failure resolved?
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The procedure is complete. |
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Go to Step 6. |
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STEP 6. Remove the transmission assembly from the vehicle. |
Disassemble and check the transmission assembly to check if there is a foreign material inside. |
Q.
Is the check result satisfactory?
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Replace the transmission assembly. |
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Replace the failure part. |
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