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Test Description

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

  1. 3:  This step begins the testing for a poor voltage or ground connection.
Step Action Values Yes No
1 Use the scan tool to determine if any other DTCs are set.
Are other DTCs set?		 - Go to Diagnostic Trouble Code (DTC) List  Go to Step 2 
2 Clear all DTCs and road test the vehicle.
Does DTC C0550 set again?		 - Go to Step 4  Go to Step 3 
3 
  1. Inspect all wiring harness connectors and terminals, especially those at the electronic brake control module (EBCM), for any condition that could cause an intermittent.
  2. Repair any problems found.
Did you find and correct the condition?		 - System OK -
4
  1. Turn the ignition switch to OFF.
  2. Disconnect the EBCM connector J1.
  3. Turn the ignition switch to ON.
  4. Measure the voltage between ground and terminals 15, 17, and 18 of the EBCM harness connector J1.
Does the voltage measure within the specified range?		 11-14 V Go to Step 6  Go to Step 5 
5
  1. Inspect the voltage supply and the ground connections to the EBCM.
  2. Repair any open or high resistance found.
Did you find and correct the condition?		 - System OK -
6 Inspect the EBCM connector J1 for any ineffective terminals.
Are there any ineffective terminals?		 - Go to Step 7  Go to Step 8 
7 Repair any connector problem found.
Did you complete the repair?		 - System OK -
8 Clear all DTCs and road test the vehicle.
Does DTC 0550 set again?		 - Go to Step 9  System OK
9 Replace the antilock brake system (ABS) unit.
Did you complete the replacement?		 - System OK -
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