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PROCEDURE

PROCEDURE

Note

This section is specified for H4DOTC engine (model).


CHECK PRE-INSPECTION.

Ask the customer when and how trouble occurred using interview checklist.

Before performing the diagnosis, inspect following items which might influence the AT problems.


• General inspection

• Oil leak

• Check if each harness connector is securely connected.

• Visually check the harness for damage.

• Stall speed test

• Line pressure test

• Transfer clutch pressure test

• Time lag test

• Road test

• Inhibitor switch


Is the item that might influence AT problem normal?

Yes


No

Repair or replace each item.


CHECK AT OIL TEMP WARNING LIGHT.

Turn the ignition switch to ON.

Does the AT OIL TEMP warning light illuminate?

Yes


No


CHECK AT OIL TEMP WARNING LIGHT.

Turn the ignition switch to OFF.

Repair the AT OIL TEMP warning light circuit or power supply and ground line circuit.



Turn the ignition switch to ON.

Is the AT OIL TEMP warning light illuminate?

Yes


No


CHECK INDICATION OF DTC.

Calling up the DTC.

With Vehicle Diagnostic Interface



Note

If the communication function of Vehicle Diagnostic Interface cannot be executed normally, check the communication circuit.


Is the DTC displayed?

Yes

•

•
Note

Record all DTC.



No


PERFORM THE GENERAL DIAGNOSTICS.

Inspect using “Diagnostic Procedure without DTC”.

Inspect using “Symptom Related Diagnostic”.

Perform the clear memory mode.

With Vehicle Diagnostic Interface



Perform the inspection mode.

Calling up the DTC.

With Vehicle Diagnostic Interface



Is the DTC displayed?

Yes


No

Complete the diagnosis.


PERFORM THE DIAGNOSIS.

Inspect using “Diagnostics Chart with DTC”.

Note

For DTC table, refer to “List of Diagnostic Trouble Code (DTC)”.


Repair the trouble cause.

Perform the clear memory mode.

With Vehicle Diagnostic Interface



Perform the inspection mode.

Calling up the DTC.

With Vehicle Diagnostic Interface



Is the DTC displayed?

Yes

Inspect using “Diagnostics Procedure with Diagnostic Trouble Code (DTC)”.


No

Complete the diagnosis.