Acura TSX / Honda Accord CL. Manual — part 930

Fig. 30: 3rd Gear Power Flow

4th Gear

Hydraulic pressure is applied to the servo valve to engage the reverse selector with the countershaft 4th gear and
reverse selector hub while the shift lever is in the D , D

3

, and M positions (forward range).

Hydraulic pressure is also applied to the 4th clutch, then the 4th clutch engages the mainshaft 4th gear with the
mainshaft.

The mainshaft 4th gear drives the countershaft 4th gear and the countershaft.

Power is transmitted to the final drive gear, which in turn drives the final driven gear.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

Fig. 31: 4th Gear Power Flow

5th Gear

Hydraulic pressure is applied to the 5th clutch, then the 5th clutch engages the mainshaft 5th gear with the
mainshaft.

The mainshaft 5th gear drives the countershaft 5th gear and the countershaft.

Power is transmitted to the final drive gear, which in turn drives the final driven gear.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

Fig. 32: 5th Gear Power Flow

R Position

Hydraulic pressure is applied to the servo valve to engage the reverse selector with the countershaft reverse gear
and reverse selector hub while the shift lever is in the R position.

Hydraulic pressure is also applied to the 4th clutch, then the 4th clutch engages the mainshaft reverse gear with
the mainshaft.

The mainshaft reverse gear drives the countershaft reverse gear via the reverse idler gear.

The rotation direction of the countershaft reverse gear is changed by the reverse idler gear.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed

The countershaft reverse gear drives the countershaft via the reverse selector, which drives the reverse selector
hub.

Power is transmitted to the final drive gear, which in turn drives the final driven gear.

Fig. 33: R Position Power Flow

ELECTRONIC CONTROL SYSTEM

Functional Diagram

The electronic control system consists of the powertrain control module (PCM), sensors, and solenoid valves.
Shifting and lock-up are electronically controlled for comfortable driving under all conditions.

The PCM receives input signals from the sensors, switches, and other control units, perform processing data,
and outputs signals for the engine control system and A/T control system. The A/T control system includes shift
control, grade logic control, clutch pressure control, and lock-up control is stored in the PCM.

2004 Acura TSX

2004 AUTOMATIC TRANSMISSIONS Diagnosis - MCTA 5-Speed