Opel Power Steering Pump - Revision history

Jason arnold: Revised Mechanical Properties and added Fluid section

2025-10-03T03:12:15Z

Revised Mechanical Properties and added Fluid section

← Older revision		Revision as of 03:12, 3 October 2025
Line 1:		Line 1:
	This type of power steering pump is made by TRW and used in the Opel/Vauxhall Astra G and Zafira A. It's called the "Type 2" or "TRW 2" pump and is known to be quite noisy.		This type of power steering pump is made by TRW and used in the Opel/Vauxhall Astra G and Zafira A. It's called the "Type 2" or "TRW 2" pump and is known to be quite noisy.
	[[File:Opel_Astra_Power_Steering_Pump.jpg\|alt=\|border\|right\|frameless]]		[[File:Opel_Astra_Power_Steering_Pump.jpg\|alt=\|border\|right\|frameless]]


	The correct oil for this pump is Fuchs TITAN CHF202 (formerly known as Pentosin CHF202) or anything that fulfills the Opel requirement 19 40 766. It has a green color. [https://openinverter.org/forum/download/file.php?id=12865]

	== Electrical Connection [https://openinverter.org/forum/viewtopic.php?p=3771#p3771] ==		== Electrical Connection [https://openinverter.org/forum/viewtopic.php?p=3771#p3771] ==
	[[File:TRW 2 Power Steering Pump.png\|thumb\|Schematic from the Opel Astra G]]		[[File:TRW 2 Power Steering Pump.png\|thumb\|Schematic from the Opel Astra G]]
Line 70:		Line 66:
	[[File:Opel Astra Power Steering Pump Harness (Bosch).jpg\|border\|frameless]]		[[File:Opel Astra Power Steering Pump Harness (Bosch).jpg\|border\|frameless]]

	== Mechanical ~~Connection and~~ Dimensions ==		== Mechanical Properties ==
	~~The hydraulic high~~ pressure ~~line has an~~ M16x1.5 thread [https://youtu.be/GD5K6TmF5PY?t=350].
			=== Dimensions ===
			TBD

			=== Fittings ===
			High pressure side (pump supply/outlet): M16x1.5 thread [https://youtu.be/GD5K6TmF5PY?t=350].

			Low pressure side (pump return/inlet) is just a hose. The fitting on the reservoir is likely 10mm (3/8").

			=== Mounting Bracket ===
			WillFab Motorsport (WFM) produces a universal fit bracket for this pump. Available [https://www.willfabmotorsport.co.uk/collections/eps-cradles-brackets here] and [https://www.ebay.co.uk/str/wfmttc here].

	* Diameter: Return line		== Fluid ==
	* Thread of high pressure line		The correct oil for this pump is Fuchs TITAN CHF202 (formerly known as Pentosin CHF202) or anything that fulfills the Opel requirement 19 40 766. It has a green color. [1]
	* Mounting: Threads, Angle, ...
	[[Category:Opel]]		[[Category:Opel]]
	[[Category:Power Steering]]		[[Category:Power Steering]]

Jason arnold: Added "Operation & Issues" section

2025-10-03T02:54:04Z

Added "Operation & Issues" section

← Older revision		Revision as of 02:54, 3 October 2025
Line 36:		Line 36:
	\|}		\|}

			=== Operation & Issues ===
			To ensure a quick start up of the pump the signals on the Black and Blue-White wire need to be sequenced. The Black wire indicates that the ignition is on. This alone does not start the pump, probably to save battery capacity for starting the internal combustion engine. Only if there's voltage on the Blue-White wire present the pump starts. This would be connected to the alternator to indicate the engine is running and the alternator provides enough current to feed the power steering pump.

	~~To ensure a quick start~~ up of the pump ~~the signals on the black and blue-white wire need to be sequenced~~. ~~The black wire indicates that~~ the ~~ignition~~ is ~~on. This alone does not start~~ the pump, ~~probably to save battery capacity for starting the internal combustion engine. Only if~~ there~~'s voltage on~~ the ~~blue-white wire present the pump starts~~. This ~~would be connected~~ to the ~~alternator~~ to ~~indicate~~ the ~~engine is running and the alternator provides enough current to feed the power steering pump~~.		Connecting both wires together and feeding them +12V at the same time works as well, but results in slow spool up of the pump.

			If the Black (+12V Ignition Signal) is connected to constant power rather than switched, the pump will still function, but there will be a parasitic draw of ~200mA when the vehicle is off. This was done experimentally to try sequencing the Blue-White wire with ignition power in order to have a faster start, but the spool up was still slow.

	~~Connecting both wires together and feeding them +12V at the same time works as well, but results in slow spool up of the pump.~~
	=== K-Bus Communications ===		=== K-Bus Communications ===
	The pump can be accessed for diagnostics via K-Bus. This has not been reverse engineered yet.		The pump can be accessed for diagnostics via K-Bus. This has not been reverse engineered yet.

Tom91: Categories

2024-12-20T16:46:30Z

Jason arnold: /* Electrical Connection */ added Bosch connector variant and "LV Connectors" sub-heading

2024-03-15T05:07:36Z

Electrical Connection : added Bosch connector variant and "LV Connectors" sub-heading

@@ Line 40: / Line 40: @@
 Connecting both wires together and feeding them +12V at the same time works as well, but results in slow spool up of the pump.
 === K-Bus Communications ===
 The pump can be accessed for diagnostics via K-Bus. This has not been reverse engineered yet.
@@ Line 47: / Line 45: @@
 === Power Consumption ===
 The pump should be connected via an 80A fuse to the 12V. The initial current will be quite high, the idle current should be around 6A without delta pressure from the steering column.
 == Mechanical Connection and Dimensions ==

Crasbe: Added the correct wire gauges and a snapshot from the original Schematic. Corrected the diagnostic information (K-Bus instead of LIN) and added the thread pitch for the high pressure line.

2022-01-07T14:52:07Z

Added the correct wire gauges and a snapshot from the original Schematic. Corrected the diagnostic information (K-Bus instead of LIN) and added the thread pitch for the high pressure line.

← Older revision		Revision as of 14:52, 7 January 2022
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	== Electrical Connection [https://openinverter.org/forum/viewtopic.php?p=3771#p3771] ==		== Electrical Connection [https://openinverter.org/forum/viewtopic.php?p=3771#p3771] ==
	[[File:~~Opel_Astra_Power_Steering_Pump_Harness~~.~~jpg~~\|~~alt=~~\|~~border\|right\|frameless~~]]		[[File:TRW 2 Power Steering Pump.png\|thumb\|Schematic from the Opel Astra G]]

	=== Pinout and Cables ===		=== Pinout and Cables ===
Line 16:		Line 16:
	\|-		\|-
	\|Red		\|Red
	\|~~"thick"~~		\|10mm²
	\| +12V Supply		\| +12V Supply
	\|-		\|-
	\|Brown		\|Brown
	\|~~"thick"~~		\|10mm²
	\|Chassis Ground		\|Chassis Ground
	\|-		\|-
	\|Black		\|Black
	\|~~"thin"~~		\|0.75mm²
	\| +12V Ignition Signal		\| +12V Ignition Signal
	\|-		\|-
	\|Blue-White		\|Blue-White
	\|~~"thin"~~		\|0.75mm²
	\|~~"Engine Running" Indicator from~~ Alternator		\|Alternator Pin 61
			\|-
			\|Brown-White
			\|0.75mm²
			\|K-Bus Diagnostics
	\|}		\|}

Line 36:		Line 40:

	Connecting both wires together and feeding them +12V at the same time works as well, but results in slow spool up of the pump.		Connecting both wires together and feeding them +12V at the same time works as well, but results in slow spool up of the pump.
			[[File:Opel_Astra_Power_Steering_Pump_Harness.jpg\|alt=\|border\|right\|frameless]]

			=== K-Bus Communications ===
	=== ~~LIN Communication~~ ===		The pump can be accessed for diagnostics via K-Bus. This has not been reverse engineered yet.

	=== Power Consumption ===		=== Power Consumption ===
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	== Mechanical Connection and Dimensions ==		== Mechanical Connection and Dimensions ==
			The hydraulic high pressure line has an M16x1.5 thread [https://youtu.be/GD5K6TmF5PY?t=350].

	* Diameter: Return line		* Diameter: Return line

Crasbe: Added headlines, categories, information about the used power steering fluid.

2022-01-06T20:37:42Z

Added headlines, categories, information about the used power steering fluid.

@@ Line 1: / Line 1: @@
-Pump:<br>
+This type of power steering pump is made by TRW and used in the Opel/Vauxhall Astra G and Zafira A. It's called the "Type 2" or "TRW 2" pump and is known to be quite noisy.
-[[File:Opel Astra Power Steering Pump.jpg|frameless|border]]
+[[File:Opel_Astra_Power_Steering_Pump.jpg|alt=|border|right|frameless]]
-In former case pump will spool up at once and provide steady pressure. It will draw some 6A of current with no delta pressure at the steering end.
+The correct oil for this pump is Fuchs TITAN CHF202 (formerly known as Pentosin CHF202) or anything that fulfills the Opel requirement 19 40 766. It has a green color. [https://openinverter.org/forum/download/file.php?id=12865]
-Normally i use one 12V relay in a car to signal 12V ignition live to other support elements inside car. I connect there coolant water pump, DCDC enable signal, power to inverter , precharge relay, vacuum pump and of course EHPAS pump black wire.
+== Electrical Connection [https://openinverter.org/forum/viewtopic.php?p=3771#p3771] ==
-When i turn to start the car i have one latching (or two) relay to provide "engine on" signal for car computer. I connect blue/white wire here nd as soon as i start inverter power steering is on!
+[[File:Opel_Astra_Power_Steering_Pump_Harness.jpg|alt=|border|right|frameless]]
-</blockquote>

Crasbe: Crasbe moved page EV Conversion Parts - Power Steering Pump - Opel Astra to Opel Power Steering Pump: Page navigation should not be done through the title

2022-01-06T19:58:46Z

Crasbe moved page EV Conversion Parts - Power Steering Pump - Opel Astra to Opel Power Steering Pump: Page navigation should not be done through the title

← Older revision		Revision as of 19:58, 6 January 2022
(No difference)

Mdrobnak: Created page with "Pump:
border

Harness:
border

Us..."

2020-05-26T17:56:38Z

Created page with "Pump: frameless|border Harness: frameless|border Us..."

New page

Pump: 
[[File:Opel Astra Power Steering Pump.jpg|frameless|border]]
 
 
Harness: 
[[File:Opel Astra Power Steering Pump Harness.jpg|frameless|border]]
 
 
Usage:

From Arber333:
<blockquote>
So here is how the pump works.
- Connect thick red wire on live 12V via 80A fuse.
- Connect thick brown wire to car chassis as negaitve lead.
- Driver provides ignition 12V and pump should get this signal via thin Black wire.
- starts engine and pump gets the signal from live alternator voltage via thin blue/white wire.

In former case pump will spool up at once and provide steady pressure. It will draw some 6A of current with no delta pressure at the steering end.
You can connect both thin wires to 12V at the same time too however. In that case pump will start, but will spool up really slowly.

Normally i use one 12V relay in a car to signal 12V ignition live to other support elements inside car. I connect there coolant water pump, DCDC enable signal, power to inverter , precharge relay, vacuum pump and of course EHPAS pump black wire.
When i turn to start the car i have one latching (or two) relay to provide "engine on" signal for car computer. I connect blue/white wire here nd as soon as i start inverter power steering is on!
</blockquote>

← Older revision		Revision as of 16:46, 20 December 2024
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	* Thread of high pressure line		* Thread of high pressure line
	* Mounting: Threads, Angle, ...		* Mounting: Threads, Angle, ...

	~~[[Category:OEM]]~~
	[[Category:Opel]]		[[Category:Opel]]
	[[Category:Power Steering]]		[[Category:Power Steering]]