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AUTOMATIC TRANSMISSION – Troubleshooting <A/T> 23-18 INSPECTION PROCEDURE 3 Does not move forward only Probable cause When the engine is idling, the vehicle does not move forward even if the selector D Malfunction of forward clutch D Malfunction of direct clutch D Malfunction of one-way clutch No. 2 D Malfunction of brake No. 1, No. 2, No. 3 D Malfunction of A/T-ECU L : Refer to the Transmission Workshop Manual. Does not vehicle move forward in D, No Check the forward clutch. L Yes Does not vehicle move forward in D No Check one-way clutch No. 2. L Yes Does not vehicle move forward in 2 No Check the brake No. 3. L Yes Which is the drive gear in D range? 2nd Check the brake No. 1, No. 2. L 3rd Check the direct clutch. L Check the trouble symptoms. NG Replace the A/T-ECU. INSPECTION PROCEDURE 4 Does not reverse only Probable cause When the engine is idling, the vehicle does not reverse even if the selector lever D Malfunction of brake No. 1, No. 3 D Malfunction of direct clutch D Malfunction of valve body D Malfunction of planetary gear D Malfunction of A/T-ECU L : Refer to Transmission Workshop Manual. Check the drive gear in D range. 2nd Check the brake No. 1. L 1st 3rd Check the planetary gear. L Does the A/T shift up to 2nd gear? No Malfunction of 1-2 shift valve. L Yes Is there any slippage in 3rd gear in NG Check the direct clutch. L OK Check the brake No. 3. L Check the trouble symptoms. NG Replace the A/T-ECU. |