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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 992 (Power Steering System) >> Diagnostic Information and Procedures >> DTC C0544 >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  Checks to see if DTC resets.
  2. 3:  Tests the steering wheel position sensor phase A and phase B circuits for an open or short to ground.
  3. 4:  Checks for poor connections at the harness connector of the steering wheel position sensor connector.
  4. 5:  Checks for poor connections at the harness connector of the EHPS module connector.
  5. 7:  Checks to see if DTC resets.
DTC C0544

Step Action Yes No
Schematic Reference: Power Steering System Schematics 
Connector End Views Reference: Power Steering System Connector End Views 
1 Did you perform the electro-hydraulic power steering (EHPS) Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Power Steering System 
2 
  1. Install a scan tool.
  2. Turn the ignition switch to the ON position, with the engine OFF.
  3. Using the scan tool, clear the DTCs.
  4. Start the engine.
  5. Drive the vehicle over 10 km/h (6.21 mph) for at least two minutes.
Does the DTC reset?		 Go to Step 3  Go to Diagnostic Aids
3 
  1. Turn the engine OFF.
  2. Test the steering wheel position sensor phase A and phase B circuits for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems?
Did you find and correct the condition?		 Go to Step 9  Go to Step 4 
4  Inspect for poor connections at the harness connector of the steering wheel position sensor connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 9  Go to Step 5 
5  Inspect for poor connections at the harness connector of the EHPS module connector. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 9  Go to Step 6 
6
IMPORTANT: Perform the Learn Alignment procedure. Refer to Measuring Wheel Alignment (w/Rear Wheel Steering)Measuring Wheel Alignment (w/o Rear Wheel Steering) in Wheel Alignment.
Replace the steering wheel position sensor. Refer to Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement in Steering Wheel and Column.Did you complete the replacement?		 Go to Step 7  -
7 
  1. Using a scan tool, monitor the steering wheel rate while parameter.
  2. Start the engine.
  3. Drive the vehicle over 10 km/h (6.21 mph) for at least 2 minutes.
Does DTC C0544 reset?		 Go to Step 8  -
8
IMPORTANT: Always perform the calibration procedure for the brake pedal position (BPP) sensor. Refer to Brake Pedal Position Sensor Calibration Description and Operation .
Replace the EHPS powerpack. Refer to Power Steering Pump Replacement (4.3L) Power Steering Pump Replacement (4.8L, 5.3L and 6.0L) Power Steering Pump Replacement (8.1L) Power Steering Pump Replacement (6.6L Diesel) Power Steering Pump Replacement (Parallel Hybrid Truck) .Did you complete the replacement?		 Go to Step 9  -
9
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 Go to Step 2  System OK
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