Acura / Honda transmission. Manual — part 20

The Honda/Acura TCC Solenoid for the M7WA/MGFA can be either an
ON/OFF or Pulse-Width Modulated unit. The unit is pulsed steadily
(Fixed Frequency) (Fixed Frequency) at 65 to 200 Hz. Then the
positive or negative side of the wave is widened or narrowed to control
the TCC pressure. The Pulse-Width has a duty-cycle in percentage.
90% DC = full operation 10% = almost OFF. Use a duty-cycle meter to
test signal. DO NOT apply steady power to this unit. This is a low
resistance unit and will get damaged by steady power application. Use
a turn-signal flasher in series with the solenoid to test. This will reduce
current allowing you to test the unit. This unit is POWER controlled by
the TCM or PCM at pin 2. The GROUND is taken from the solenoid body
itself.

TCC PWM Resistance = 15 to 28 Ohms

MAX CURRENT = Do not apply steady power. Low resistance unit.

Electronic Pressure Control Solenoid (LPS)

The Electronic Pressure Control Solenoid (LPS) also called the Linear
Throttle Pressure Control Solenoid (Honda and Acura) for the
M7WA/MGFA transmission is a PWM or Pulse Width Modulated unit.
PWM is a ratio of On to OFF. A 90% Duty-Cycle means that the unit is
ON 90% of the time, therefore, there will be high trans-fluid pressure.
The TCM provides both POWER and GROUND to control the unit. The
TCM varies the duty-cycle to the solenoid at a steady frequency. Do
not apply steady power to this solenoid or damage will result. This is a
low resistance unit. Use a turn-signal flasher in series with the unit
when testing. This will pulse and restrict power, preventing damage.

EPC RESISTANCE: 3 to 6 Ohms

MAX CURRENT: Do not apply steady power. Current depends on duty-
cycle.

MCVA/MRVA

Shift Solenoids

The MCVA/MRVA 4 shift solenoids are normally closed. These solenoids
are POWER controlled at trans conn. pins 5(SS-A [Blu/Blk]), 2(SS-B
[Grn/Wht]), 1(SS-C [Grn]) and 3(SS-D [Yel]). The solenoid wires are
GROUNDED at the transmission body itself. Solenoid resistance should
be between 11 and 26 Ohms. TO meassure voltage, inject power at
sol. pins. You should see 12 volts at sol. body when solenoid is
removed from trans-body and hear a click. If no voltage is seen at
solenoid body side, then solenoid coil is open or broken.

SHIFT-SOLENOID Resistance = 11 - 26 Ohms

MAXIMUM CURRENT at room temperature = 1.10 Amps or 1100 mA

POWER FEED Test between Batt + and Solenoid Power-Feed = 100 to
300 mVolts w/KOER

TCC ON/OFF Solenoid

The MCVA/MRVA uses 3 clutch control solenoids. These are PWM
controlled. Go to the TCC PWM section for further information.

TCC PWM Solenoid

The Honda/Acura TCC Solenoid for the MCVA/MRVA can be either an
ON/OFF or Pulse-Width Modulated unit. The unit is pulsed steadily
(Fixed Frequency) at 65 to 200 Hz. Then the positive or negative side
of the wave is widened or narrowed to control the TCC pressure. The
Pulse-Width has a duty-cycle in percentage. 90% DC = full operation
10% = almost OFF. Use a duty-cycle meter to test signal. DO NOT
apply steady power to this unit. This is a low resistance unit and will
get damaged by steady power application. Use a turn-signal flasher in
series with the solenoid to test. This will reduce current allowing you to
test the unit. This unit is POWER controlled by the TCM or PCM at pin
2. The GROUND is taken from the solenoid body itself.

TCC PWM Resistance = 16 to 30 Ohms

MAX CURRENT = Do not apply steady power. Low resistance unit.

Pressure control solenoids

The MCVA/MRVA uses 3 separate pressure control solenoids. Pressure
is controlled according to the 3 PCS combination engagement.

RESISTANCE AT EACH SOLENOID: 6 Ohms

MDKA/BDKA

Shift Solenoids

The MDKA/BDKA 3 shift solenoids are normally closed. These solenoids
are POWER controlled through independent sol. connectors pin 2 each.
The solenoid wires are GROUNDED at the transmission body itself.
Solenoid resistance should be between 11 and 26 Ohms. TO meassure
voltage, inject power at sol. pins. You should see 12 volts at sol. body
when solenoid is removed from trans-body and hear a click. If no
voltage is seen at solenoid body side, then solenoid coil is open or
broken.

SHIFT-SOLENOID Resistance = 11 - 26 Ohms

MAXIMUM CURRENT at room temperature = 1.10 Amps or 1100 mA

POWER FEED Test between Batt + and Solenoid Power-Feed = 100 to
300 mVolts w/KOER

TCC On/Off solenoid

The MDKA/BDKA TCC On/Off solenoid is used to control the application
of the torque converter wet clutches. This is just an Allow or Not-allow
device. Once the TCC On/Off solenoids allows fluid passage, the TCC
PWM solenoid then controls the engagement and makes actuation
harsher or softer. The TCC On/Off solenoid is very similar electrically
and often the same as the normal shift solenoids. This solenoid is
POWER controlled by the TCM at pin 1 (yel). The TCC solenoid is
grounded at the body or dedicated ground wire. A TCC PWM may also
be employed called Sol-B. If power is applied, you'll hear a click. Also
remove the solenoid and see if when injecting power the solenoid body
also goes to 12 volt potential, indicating good solenoid-coil integrity.

TCC On/Off Resistance = 12 - 24 Ohms

MAXIMUM CURRENT at room temperature = 1.00 Amps or 1000 mA

POWER FEED Test between Batt + and Solenoid Power-Feed = 100 to
300 mVolts w/KOER

TCC PWM Solenoid

The Honda/Acura TCC Solenoid for the MDKA/BDKA can be either an
ON/OFF or Pulse-Width Modulated unit. The unit is pulsed steadily