Acura / Honda transmission. Manual — part 15

This book is based on the "Automotive Transmission Troubleshooter" software by the

same author. All similarities to this software package are intended. Both of these
products are copyrighted by the author, Mandy Concepcion. For further insight on

automotive transmissions please see our complementary DVD-Video.

Section: Acura/Honda Shift Solenoids and Electrical Component
Testing (Shift Solenoids, TCC Solenoid, Pressure Control
Solenoid (EPC), TPS, TCM Test, Pressure Switches)

4L30E

Shift Solenoids

The Honda 4L30-E 1-2/3-4 shift solenoids are normally closed. The 2-3
solenoid is normally open. 2-3 Solenoid is ground controlled through
pin A at trans connector. 1-2/3-4 solenoids are GROUND controlled
through pin C at the trans connector. The solenoids are fed POWER at
pin D. Solenoid resistance should be between 16 and 22 Ohms.
Meassure voltage between pins A or B and Ground. You should see 12
volts when solenoid is not actuated and almost 0.00 volts when the
TCM actuates the solenoid. If no voltage is seen at pulsed side, then
solenoid coil is open or wire is broken.

SHIFT-SOLENOID Resistance = 16 - 22 Ohms

MAXIMUM CURRENT at room temperature = 0.75 Amps or 750mA

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

TCC On/Off solenoid

The Honda 4L30-E 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.
Ignition power feed is supplied to the solenoid by the TCM at pin D.
The TCM/PCM uses ground to actuate the TCC sol through pins A.

TCC On/Off Resistance = 16 - 22 Ohms

MAXIMUM CURRENT at room temperature = 0.75 Amps or 750 mA

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

TCC On/Off Solenoid

The Honda 4L30-E uses a TCC On/Off sol. only.

Pressure Control Solenoid (PCS)

The Pressure Control Solenoid (PCS) for the Honda 4L30-E
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. This unit is
GROUND controlled by the TCM or PCM. The TCM or PCM applies a
pulsed ground to pin C. Power is taken at pin B. 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.

PCS RESISTANCE: 3 to 9 Ohms

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

B7TA/B7YA

Shift Solenoids

The B7TA/B7YA 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 B7TA/B7YA TCC On/Off solenoid (Sol-A) 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 (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