ELECTRIC AT OIL PUMP

id119000000600

Purpose of Adoption

• To realize smooth startability after the engine is restarted, an electric AT oil pump has been adopted which generates hydraulic pressure in the oil line of the automatic transaxle when the i-stop (engine-stop control) permit conditions are met and the engine is stopped.

Service Point

• The electric AT oil pump cannot be disassembled. If it is disassembled, replace it.

• Make sure that there is no silicone sealant or foreign matter in the electrical AT oil pump and transaxle. Otherwise, it could cause a malfunction.

• Verify the following items related to the electric AT oil pump operation.

― Electric AT oil pump and pump relay circuit

― Pump and relay connector or terminal condition

― TCM connector or terminal condition

― MAIN 200 A fuse

― AT PUMP 15 A fuse

• If the TCM detects the following for a continuous 5 s, P181F:00 is stored.

― Electric AT oil pump circuit malfunction

― Electric AT oil pump relay circuit malfunction

• If the actual electric AT oil pump rotation speed under the following conditions is 100 rpm or less for a continuous 10 s, P0C2C:00 is stored.

― Pump rotation speed command value is 500 rpm or more

― Electric AT oil pump relay is on

― P181F:00 has not been stored

Common Inquiry

• If there is an electric AT oil pump malfunction, the following symptoms occur as an acceleration malfunction.

― Acceleration from i-stop is not smooth.

― Shock when accelerating vehicle from i-stop.

― Engine vibration increases when engine is restarted.

― Vehicle reverses when accelerating from standstill on an up slope.

Other

• Not applicable