The Honda/Acura TCC Solenoid for the BGRA 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 = 15 to 28 Ohms
MAX CURRENT = Do not apply steady power. Low resistance unit.
Electronic Pressure Control Solenoid
The Electronic Pressure Control Solenoid (Solenoid A) for the BGRA
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: 5 to 6 Ohms
MAX CURRENT: Do not apply steady power. Current depends on duty-
cycle.