Pinpoint Test B: Unable To Enter Self-Test

Test Step 

1. B1 CHECK THE COMMUNICATIONS TO THE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE 
   • Check the communications to the ABS module.
   • Does the diagnostic tool communicate with the ABS module? 

   Result / Action to Take 

   1. Yes:  GO to B2.
   2. No:  Go To PINPOINT TEST A: NO COMMUNICATION WITH THE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE .
2. B2 CHECK FOR CORRECT ABS MODULE OPERATION 
   • Disconnect the ABS connector.
   • Check for:
     • corrosion
     • pushed-out pins
   • Connect the ABS connector and make sure it seats correctly.
   • Operate the system and verify the concern is still present.
   • Is the concern still present? 
   1. Yes:  INSTALL a new ABS module. REFER to MODULE . TEST the system for normal operation.
   2. No:  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.