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TROUBLESHOOTING <A/T> AUTOMATIC TRANSMISSION (FF) 23A-91 STEP 4. Hydraulic pressure test Measure the hydraulic pressure of the underdrive OK: Refer to . Q: Is the check result normal? YES : Go to Step 7. NO : Go to Step 5. STEP 5. Engine-A/T-ECU replacement customer exists. Q: Does a malfunction take place again? YES : Go to Step 6. NO : The inspection is complete. STEP 6. Valve body disassembly, cleaning, check solenoid valves, springs and valve body for (2) Test drive the vehicle. customer exists. Q: Does a malfunction take place again? YES : Go to Step 7. NO : The inspection is complete. STEP 7. Oil pump check replace the oil pump assembly. (2) Test drive the vehicle. customer exists. Q: Is the check result normal? YES : Go to Step 8. NO : The inspection is complete. STEP 8. Underdrive clutch check ring for damage and interference with the (2) Test drive the vehicle. customer exists. Q: Is the check result normal? YES : The inspection is complete. NO : Repair or replace the underdrive clutch. INSPECTION PROCEDURE 4: Does not move backward COMMENTS ON TROUBLE SYMPTOM If the vehicle does not move backward when the POSSIBLE CAUSES • Abnormal reverse clutch pressure • Abnormal low-reverse brake pressure • Malfunction of low-reverse solenoid valve • Malfunction of the reverse clutch • Malfunction of low-reverse brake • Malfunction of valve body • Malfunction of the engine-A/T-ECU DIAGNOSIS STEP 1. MUT-III actuator test Item 01: Low-reverse solenoid valve OK: Operating sound can be heard. Q: Is the check result normal? YES : Go to Step 2. NO : Replace the low-reverse solenoid valve. STEP 2. Hydraulic pressure test Measure the hydraulic pressure for reverse clutch ). OK: Refer to . Q: Is the check result normal? YES : Go to Step 5. NO : Go to Step 3. |