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STEP
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INSPECTION
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ACTION
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1
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Powertrain control system
• Are there any malfunctions with the following?
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- Electrical input/output
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- Vehicle wiring harness
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- PCM
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- Transaxle fluid temperature (TFT) sensor
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- TCC solenoid
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Yes
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Perform OBD test
Perform DTC troubleshooting
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No
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Go to the next step
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2
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Control valve body
• Do any of the following malfunctions exist?
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- Bolts are not tightened to the specification
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- Gaskets are damaged
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- Bypass clutch control valve and plunger (always applied), converter regulator valve are stuck, damaged, or misassembled
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- Separator plates are damaged or blocked
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- Converter is not applied in first gear or reverse gear
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- TCC solenoid malfunction
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- Pressure tap plate/gasket are damaged
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- Hydraulic passages are damaged
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Yes
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Service if necessary
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No
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Go to the next step
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3
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Oil pump
• Do any of the following malfunctions exist?
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- Bolts are not tightened to the specification
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- Gaskets are damaged
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- Pump support seal ring #1 is damaged, missing, misassembled
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Yes
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Service if necessary
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No
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Go to the next step
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4
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Torque converter component
• Do either of the following malfunctions exist?
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- Internal seals are damaged
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- Piston plate is damaged or stuck to cover
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Yes
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Service if necessary
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No
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Go to the next step
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5
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Transaxle case
• Does the following problem exist?
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- Porosity/cross leaks in CBY circuit
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Yes
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Service if necessary
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No
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The problem is fixed
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6
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• Verify the test results.
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- If normal, return to the diagnostic index to service any additional symptoms.
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- If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.
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• If the vehicle is repaired, troubleshooting is completed.
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• If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM.
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