GM Service Manual Online
For 1990-2009 cars only
Table 1: EHPS (Electrohydraulic Power Steering) Scan Tool Data Parameters
Table 2: EHPS (Electrohydraulic Power Steering) Scan Tool Output Controls

EHPS (Electrohydraulic Power Steering) Scan Tool Data Parameters

Parameter

System State

Expected Value

Description

Operating Conditions: Ignition ON

Actual Motor Current

--

Varies

This displays A. This is the actual motor current.

Actual Pump Speed

--

Varies

This displays RPM. This is the actual pump speed.

Battery Voltage

--

Varies

This displays V. This is the current battery voltage.

Desired Pump Speed

--

Varies

This displays RPM. This is the desired pump speed.

Engine Running Signal

--

Inactive

The scan tool displays Active or Inactive. This is the current state of the vehicle engine.

EHPS (Electrohydraulic Power Steering) Scan Tool Output Controls

Output Control

Description

ECU Identification Data

This output control is used to program the electronic control unit (ECU) or control module identification data.

Motor Test

This output control is used to command the EHPS motor.

Program Code Index

This output control is used to program the code index.

Program ECU

This output control is used to program the electronic control unit (ECU) or control module.

Program High Speed CAN-Bus Config.

This output control is used to program the high speed control area network (CAN) serial data bus configuration.