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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 996 (Rear Wheel Steering System) >> Diagnostic Information and Procedures >> DTC C0253: EBCM Control Valve Circuit >> 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 number below refers to the step number on the diagnostic table.

  1. 2:  This step verifies there was an improper rear wheel steering alignment performed.
DTC C0253

Step Action Yes No
Schematic Reference:  Rear Wheel Steering Schematics  
Connector End View Reference:  Rear Wheel Steering Connector End Views  
1 Did you perform the Diagnostic System Check-Rear Wheel Steering? Go to Step 2  Go to Diagnostic System Check - Rear Wheel Steering 
2 
  1. Install a scan tool.
  2. Turn the ignition switch to the ON position, with the engine OFF.
  3. With a scan tool, monitor the DTC Information for DTC C0253 in the rear wheel steering control module.
Does the scan tool indicate that DTC C0253 is current?		 Go to Step 3  Go to Diagnostic Aids
3 With a scan tool, monitor the DTC Information for DTC C0455 in the rear wheel steering control module.
Does the scan tool indicate that DTC C0455 is current?		 Go to DTC C0455  Go to Step 4 
4 With a scan tool, monitor the DTC Information for DTC C0522 in the rear wheel steering control module.
Does the scan tool indicate that DTC C0522 is current?		 Go to DTC C0522  Go toStep 5 
5 With the scan tool, monitor the sensor data.
Is the steering wheel sensor analog voltage within valid alignment range (which is within 2.0-3.0 volts) and also is the sensor feed voltage 5.00 volts?		 Go toStep 6  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
6 With the scan tool, monitor the sensor data.
Is the steering wheel sensor marker pulse within valid alignment range, and the steering wheel sensor index switch points are between + or - 10° of center, is the steering wheel centered?		 Go to Step 7  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
7 Is the scan tool data parameter rear wheel centering 1 within 2.0-3.0 volts and rear wheel centering 2 within 2.0-3.0 volts? Go to Step 8  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
8
IMPORTANT: Perform the Learn Alignment procedure. Refer toMeasuring Wheel Alignment (w/Rear Wheel Steering)Measuring Wheel Alignment (w/o Rear Wheel Steering) in Wheel Alignment.
Replace the rear wheel steering module. Refer to Rear Wheel Steering Control Module Replacement .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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