Automatic Transmission: Maintenance Acura MDX II facelift

PCM/TCM Reset

Note. To reset the PCM/TCM, initialize only the automatic transmission memory stored in the PCM or the TCM.

1. Select the A/T system with the HDS.
2. Reset the PCM/TCM with the HDS while the engine is stopped.
3. Turn the ignition switch to LOCK (0).
4. Turn the ignition switch to ON (II), and wait for 30 seconds.
5. Turn the ignition switch to LOCK (0), and disconnect the HDS from the DLC.

Tool Maintenance

Follow these instructions to keep the ATF cooler cleaner working properly

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1. Replace the two magnetic non bypass spin-on filters after every 20 hours of use, based on the hour meter, or when you notice a restriction in the ATF flow.
2. Check the level and condition of the fluid in the tank before each use.
3. Replace the ATF in the tank when it looks dark or dirty.

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Note. When installing the hose clamps, make sure they do not interfere with the surrounding parts.

1. Install the ATF cooler hoses over the ATF cooler lines with the clips at the appropriate points in reference to the following list. Align the paint mark (K) facing up and the paint mark (L) facing to the rear. Point Distance from Hose End to Clip (J) Hose End Contact Point A 2-4 mm (0.08-0.16 in) Bulge B C 6-8 mm (0.24-0.31 in) Bulge D E F G 6-8 mm (0.24-0.31 in) ATF filter housing from 2 mm (0.08 in) H 6-8 mm (0.24-0.31 in) ATF filter housing I 6-8 mm (0.24-0.31 in) Bulge
2. Align the paint mark (M) on the ATF cooler hose end with the paint mark (N) on the ATF filter holder.
3. Secure the ATF cooler hose with the clamps (O) at the marking (P).
4. Refill the transmission with ATF to the proper level (see step 8 under «ATF Replacement»(ref-510439-S02544514302012102300000) ).

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1. Raise the vehicle on a lift, and make sure it is supported securely.
2. Remove the front undercover (A) and the splash shield (B).
3. Remove the front bulkhead cover, and remove the front bumper (see «FRONT BUMPER REMOVAL/INSTALLATION»(ref-510491-S25712680432012102300000) ).
4. Remove the hose clamp (A), and disconnect the ATF cooler inlet hose (B) and outlet hose (C) from the hose clamps (D), then disconnect the hoses from the ATF cooler lines.
5. Remove the power steering fluid hose clamp (A) from the ATF cooler mounting bracket.
6. Disconnect the ATF cooler hoses (B) from the ATF cooler (C). Replace the ATF cooler.
7. Connect the ATF cooler hoses over the ATF cooler (see «ATF COOLER HOSE REPLACEMENT»(ref-510439-S01881235442012102300000) ). Then install the ATF cooler.
8. Install the power steering fluid hose clamp on the bracket.
9. Connect the ATF cooler hoses, then install the hose clamp (see «ATF COOLER HOSE REPLACEMENT»(ref-510439-S01881235442012102300000) ).
10. Install the front bumper (see «FRONT BUMPER REMOVAL/INSTALLATION»(ref-510491-S25712680432012102300000) ), and install the front bulkhead cover.
11. Install the splash shield and the front undercover.
12. Check the ATF level (see «ATF LEVEL CHECK»(ref-510439-S21808850022012102300000) ).

Fluid Leak Check

1. Check for fluid leaks between the mating faces of the transfer assembly and transmission.
2. If there is leak, remove the transfer cover, then replace the transfer cover oil seal and the O-ring (see «TRANSFER COVER OIL SEAL REPLACEMENT»(ref-510439-S11412848992012102300000) ).
3. Check for fluid leaks between the transfer companion flange and the transfer oil seal.
4. If there is leak, replace the transfer oil seal and the O-ring (see «TRANSFER OIL SEAL REPLACEMENT»(ref-510439-S30399257972012102300000) ). Do not replace the oil seal with the transfer assembly on the transmission.

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1. Raise the vehicle on a lift, and make sure it is supported securely.
2. Shift the transmission into N.
3. Remove the front undercover.
4. Remove the drain plug (A), and drain the automatic transmission fluid (ATF).
5. Reinstall the drain plug with a new sealing washer (B).
6. Remove the front subframe stiffener.
7. Remove exhaust pipe A.
8. Remove the bolt securing the transfer breather hose bracket (A), and disconnect the breather hose (B) from the breather pipe (C) on the transfer assembly.
9. Make a reference mark (A) across the propeller shaft (B) and the transfer companion flange (C).
10. Separate the propeller shaft from the transfer companion flange.
11. Remove the transfer assembly from the transmission.

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1. Clean the areas where the transfer assembly contacts the transmission with solvent, and dry with compressed air. Then apply ATF to the contact area.
2. Install the dowel pin (A) in the transmission, and install the transfer assembly (B) on the transmission.
3. Install the propeller shaft (A) to the transfer companion flange (B) by aligning the reference mark (C). Make sure you use new mounting bolts.
4. Install the transfer breather hose bracket (A) on the transfer assembly, and connect the breather hose (B) over the breather pipe (C) with facing the dot mark (D) to the rear side of the vehicle.
5. Install exhaust pipe A with new self-locking nuts, its mount (B), and new gaskets (C).
6. Install the front subframe stiffener with new mounting bolts.
7. Refill the transfer assembly with transfer fluid (hypoid gear oil), if necessary (see «TRANSFER ASSEMBLY FLUID REPLACEMENT»(ref-510439-S11688777012012102300000) ).
8. Refill the transmission with ATF (see step 8 under «ATF Replacement»(ref-510439-S02544514302012102300000) ).
9. Install the front undercover.