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TROUBLESHOOTING <A/T> AUTOMATIC TRANSMISSION (FF) 23A-95 YES : Go to Step 3. NO : Refer to diagnosis code 22: Input shaft STEP 3. MUT-III diagnosis code Either of diagnosis codes 27 or 28 is set, inhibtor Q: Are diagnosis codes 27 or 28 output? YES <diagnosis code 27 is set> : Refer to diagnosis code 27: Inhibitor switch system YES <diagnosis code 28 is set> : Refer to diagnosis code 28: Inhibitor switch system NO : Go to Step 4. STEP 4. MUT-III data list Item 31: Low-reverse solenoid valve duty ratio (Refer Q: Is the check result normal? YES : Go to Step 5. NO : Replace the engine-A/T-ECU. STEP 5. Check when shift shock occurs. Q: Does the shift shock occur when the vehicle starts moving? YES : Go to Step 7. NO : Go to Step 6. STEP 6. Hydraulic pressure test Measure the hydraulic pressure for reverse clutch OK: Refer to . Q: Is the check result normal? YES : Go to Step 10. NO : Go to Step 9. STEP 7. Check when shift shock occurs. Q: Does the shift shock always occur? YES : Go to Step 9. NO : Go to Step 8. STEP 8. MUT-III data list Item 11: Throttle position sensor (Refer to data list Q: Is the check result normal? YES : Go to Step 9. NO : Check the throttle position sensor system STEP 9. Valve body disassembly clean and solenoid valve, springs and valve body for (2) Test drive the vehicle. customer exists. Q: Does a malfunction take place again? YES : Go to Step 10. NO : The inspection is complete. STEP 10. Reverse clutch and low-reverse brake Check the facing for seizure and the piston seal ring Q: Is the check result normal? YES : The inspection is complete. NO : Repair or replace the reverse clutch and INSPECTION PROCEDURE 9: Shift shock when shifting from N to D, N to R and long delay COMMENTS ON TROUBLE SYMPTOM If abnormal shock or delay of two seconds or more POSSIBLE CAUSES • Abnormal line pressure • Malfunction of throttle position sensor • Malfunction of oil pump • Malfunction of valve body • Malfunction of the engine-A/T-ECU |