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AUTOMATIC TRANSMISSION DIAGNOSIS AUTOMATIC TRANSMISSION 23A-248 INSPECTION PROCEDURE 13: Poor Acceleration . COMMENT If acceleration is poor when downshifting occurs . TROUBLESHOOTING HINTS (The most • Malfunction of the engine system • Malfunction of the clutch system and brake sys- tem • Malfunction of the ENGINE-ECU or A/T-ECU sys- tem Circuit drawings • Refer to circuit diagrams GROUP- • Refer to configuration diagrams GROUP- • Refer to component locations GROUP- DIAGNOSIS STEP 1. Check the engine system. − Symptom Chart − Poor acceleration Q: Is the inspection result good? YES : Go to Step 2. STEP 2. Check each brake and clutch. Torque Converter Stall Test. Then retest the system. Q: Is the symptom eliminated? YES : The procedure is complete. STEP 3. Perform the hydraulic pressure test. Hydraulic Pressure Test. Then retest the system. Q: Is the symptom eliminated? YES : The procedure is complete. STEP 4. Check each brake system and each clutch system. GROUP 23B, Transmission . (2) Blow 108 kPa (15 psi) compressed air into the each brake oil orifice and clutch oil orifice of the transmission case, and Q: Is the air pressure maintained? YES : The procedure is complete. |