Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan Tool, read and record RF Hub DTCs.
  Is this DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE CONNECTIONS FOR THE (B134) BRAKE SIGNAL CIRCUITS
1. Turn the ignition off.
2. Check the connections for the (B134) Brake Signal circuit for the following:
  - Proper connector installation.
  - Damaged connector or locks.
  - Corrosion and other signs of water intrusion.
  - Weather seal damaged (if equipped).
  - Bent or pushed out terminals in the connector.
  - Overheating due to a poor connection (discoloration to the terminal due to excessive current draw).
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Were any of the above conditions found?
  
  Yes
  - Repair any conditions that are found.
  No
  - Go To 3
CHECK THE (B134) BRAKE SWITCH SIGNAL CIRCUIT
1. Disconnect RF Hub C1 connector and all remaining modules on the (B134) Brake Switch Signal circuit.
2. Check the (B134) Brake Switch Signal Circuit for the following:
  - Open
  - High Resistance (above 3.0 ohms)
  - Short To Ground
  Were any of the above conditions found?
  
  Yes
  - Repair the (B134) Brake Switch Signal circuit for damage in accordance with Service Information.
  No
  - Replace the ABS ICU in accordance with the Service Information.