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AUTOMATIC TRANSAXLE 05–17–13 05–17 Evaluation of line pressure test Stall Test 1. Perform mechanical system test preparation. (See 05–17–11 Mechanical System Test Preparation.) Caution •••• Do not maintain WOT in any position/range for more than 5 seconds, or transaxle damage will 3. Firmly depress the brake pedal with the left foot, and depress the accelerator pedal to floor (WOT) with the right. 4. When the engine speed no longer increases, quickly read the engine speed and release the accelerator pedal. Engine stall speed ZM engine: 2,300—2,600 rpm 7. Turn off the engine. Evaluation of stall test Condition Possible cause Low pressure in all positions/ranges • Worn oil pump • Oil leaking from oil pump, control valve body, and/or transaxle case • Pressure regulator valve stuck • Pressure control solenoid malfunction • Solenoid reducing valve stuck Low pressure in D, 2, 1 only • Oil leaking from forward clutch hydraulic circuit Low pressure in 2 only • Oil leaking from 2-4 brake band hydraulic circuit Low pressure in 1, R only • Oil leaking from low and reverse brake hydraulic circuit Low pressure in R only • Oil leaking from reverse clutch hydraulic circuit Higher pressure in all positions/ranges • Pressure control solenoid malfunction and/or open harness • Pressure regulator valve stuck • PCM malfunction Condition Possible cause Above specification Insufficient line pressure, torque • Worn oil pump • Oil leaking from oil pump, control valve, and/or • Pressure regulator valve sticking • Converter relief valve sticking • Pressure control solenoid malfunction In D, 2 and 1 ranges • Forward clutch slipping In 2 range • 2-4 brake band slipping In 1 range and R position • Low and reverse brake slipping In R position • Low and reverse brake slipping • Reverse clutch slipping Perform road test to determine whether problem is in • Engine braking felt in 1 range: Reverse clutch is • Engine braking not felt in 1 range: Low and reverse Below specification • Engine lack of power 1712-1U-01G(05-17).fm 13 ページ 2001年6月29日 金曜日 午前10時12分 |