Accumulator: Description and Operation

ATF Pan, ATF Screen, Mechatronic and Hydraulic Pulse Memory with Accumulator Solenoid (N485) Overview

There is a risk of damaging the transmission.

• Do not start the engine when there is no ATF in the transmission or if the ATF pan has been removed.

• General repair instructions, refer to => [ Repair Information ] Repair Information.

• Clean working conditions for the automatic transmission, refer to => [ Clean Working Conditions ] Clean Working Conditions.

• Always replace the Mechatronic unit if it is dirty or faulty.

• Coat O-rings and seals with ATF. Other types of lubrication lead to faults in the transmission hydraulics.






1 ATF Pan

• Removing and Installing, refer to => [ Automatic Transmission Fluid Oil Pan ] Service and Repair

2 Gasket

• Replace

3 ATF Filter

• Removing and Installing, refer to => [ ATF Filter ] Service and Repair

4 O-ring

• Replace

5 Bolt

• Tightening specification and sequence, refer to => [ Tightening Specification and Sequence for Mechatronic without a Hydraulic Pulse Memory ]

• Tightening specification and sequence, refer to => [ Tightening Specification and Sequence for Mechatronic with a Hydraulic Pulse Memory ]

6 Mechatronic

• Removing and Installing, refer to => [ Mechatronic Unit ] Mechatronic Unit

7 O-ring

• Replace

8 O-ring

• Replace

9 Seals

• Replace

10 Connector Housing

11 Bolt

• 5.5 Nm

12 ATF Oil Pipe

13 Bolt

• 10 Nm

14 O-ring

• Replace

• Present depending on the date of manufacture

• For connecting the hydraulic pulse memory

15 Hydraulic Pulse Memory with Accumulator Solenoid (N485)

• Present depending on the date of manufacture

• Removing and Installing, refer to => [ Hydraulic Pulse Memory with Accumulator Solenoid (N485) ] Service and Repair

16 Bolt

• Present depending on the date of manufacture

• Tightening specification and sequence, refer to => [ Hydraulic Pulse Memory Tightening Specification and Sequence ]

17 Magnets

• Make sure the entire surface contacts the ATF filter

• Clean before installation

18 Bolt

• Replace

• Tightening specification and sequence, refer to => [ ATF Oil Pan - Tightening Specification and Sequence ]

19 Oil drain plug

• For the ATF in the transmission

• Tightening specification - item 1 - => [ (Item 1) ATF Drain Plug ] Transmission Drain and Inspection Plug Overview

ATF Oil Pan - Tightening Specification and Sequence





• Replaced the bolts for the ATF pan.

- Tighten the bolts in three steps in the sequence shown:






Tightening Specification and Sequence for Mechatronic without a Hydraulic Pulse Memory





- Tighten the bolts to 10 Nm in the following sequence: - 1 to 19 -.

• If the transmission has a pulse memory, then the bolt - 17 - is installed at the same time the pulse memory is installed. Refer to => [ Tightening Specification and Sequence for Mechatronic with a Hydraulic Pulse Memory ].

Tightening Specification and Sequence for Mechatronic with a Hydraulic Pulse Memory





- Tighten the bolts to 10 Nm in the following sequence - 1 through 17 -.

- Install the hydraulic pulse memory - A -. Refer to => [ Hydraulic Pulse Memory with Accumulator Solenoid (N485) ] Service and Repair.

- Tighten the bolts to 10 Nm in the following sequence: - 18 to 21 -.

• The bolts - 18, 19 and 20 - secure the hydraulic pulse memory.

Hydraulic Pulse Memory Tightening Specification and Sequence





- Tighten the bolts to 10 Nm in the following sequence: - 1 to 3 -.