Opel Power Steering Pump: Difference between revisions
(Added headlines, categories, information about the used power steering fluid.) |
(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.) |
||
| Line 6: | Line 6: | ||
== Electrical Connection [https://openinverter.org/forum/viewtopic.php?p=3771#p3771] == | == Electrical Connection [https://openinverter.org/forum/viewtopic.php?p=3771#p3771] == | ||
[[File: | [[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 | ||
| | |10mm² | ||
| +12V Supply | | +12V Supply | ||
|- | |- | ||
|Brown | |Brown | ||
| | |10mm² | ||
|Chassis Ground | |Chassis Ground | ||
|- | |- | ||
|Black | |Black | ||
| | |0.75mm² | ||
| +12V Ignition Signal | | +12V Ignition Signal | ||
|- | |- | ||
|Blue-White | |Blue-White | ||
| | |0.75mm² | ||
| | |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 === | |||
=== | The pump can be accessed for diagnostics via K-Bus. This has not been reverse engineered yet. | ||
=== Power Consumption === | === Power Consumption === | ||
| Line 44: | Line 49: | ||
== 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 | ||
Revision as of 14:52, 7 January 2022
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.
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]
Electrical Connection [2]
Pinout and Cables
| Cable Color | Gauge | Function |
|---|---|---|
| Red | 10mm² | +12V Supply |
| Brown | 10mm² | Chassis Ground |
| Black | 0.75mm² | +12V Ignition Signal |
| Blue-White | 0.75mm² | Alternator Pin 61 |
| Brown-White | 0.75mm² | K-Bus Diagnostics |
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.
K-Bus Communications
The pump can be accessed for diagnostics via K-Bus. This has not been reverse engineered yet.
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
The hydraulic high pressure line has an M16x1.5 thread [3].
- Diameter: Return line
- Thread of high pressure line
- Mounting: Threads, Angle, ...