Diagnostic Test

VERIFY ACTIVE DTC
NOTE: Make sure the IOD fuse is installed and battery Voltage is between 10 and 16 Volts before proceeding.
1. Turn the ignition on.
2. Using a scan tool, read DTCs.
  Is the U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE DTC active?
  
  Yes
  - Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing and perform the U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE diagnostic procedure.
  No
  - Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing and perform the STORED LOST COMMUNICATION DTCs diagnostic procedure.