EHPS conversion - TRW Gen II. pump

Overview

EHPS frees up to 3-5 Hp of engine power which is lost through the belt driving the mechanical pump, whereas the Ehps system needs only 1 Hp of electrical power to operate

Overal weight increase +0.7 kg, compared to OEM pump assembly

Requirements

TRW Gen II. pump (in this instance the donor was Opel Astra G 2004)

custom brackets, custom fittings

85A Alternator (stock OEM Honda is good enough)

80A fuse

Wiring location

Connector C127(14-GRY) near the clutch reservoir (see the pictures)

Battery +12V

Chassis ground

Wiring

car side	connects to	EHPS pump side
Chassis Ground GND	→	Thick black-braun-pink
BAT +12V	→	Thick red (connects via a 80A fuse)
WHT/BLU pin 2 (service manual 1157 ALT wht/blu)	→	Thin blue/white (connects to alternator check light so the steering only works when the battery is being charged, engine running)
BLK/YEL pin 1 (service manual 1157 IG1 blk/yel)	→	Thin black (ignition live signal)

Photos of final product (including custom fittings, modified bracket)

Final Assembly

Video