Pinpoint Test

CHECK THE STOPLAMPS FOR CORRECT OPERATION
1. Inspect the brake pedal position switch and make sure it is installed correctly. Check the stoplamps for correct operation by pressing and releasing the brake pedal and observing the stoplamps.
  - Do the stoplamps operate correctly?
  1. Yes: GO to 2 on page 2.
  2. No: REFER to SYMPTOM CHART: STOPLAMPS .
CHECK THE Anti-Lock Brake System (ABS) MODULE Diagnostic Trouble Codes (DTCs)
1. Ignition ON.
2. Using a scan tool, carry out the Anti-Lock Brake System (ABS) module self-test.
  - Are any communication (U-code) Diagnostic Trouble Codes (DTCs) present?
  1. Yes: REFER to DTC CHART: ANTI-LOCK BRAKE SYSTEM (ABS) MODULE .
  2. No: GO to 3 on page 2.
CHECK THE Powertrain Control Module (PCM) FOR Diagnostic Trouble Codes (DTCs)
1. Using a scan tool, carry out the Powertrain Control Module (PCM) Key ON Engine OFF (KOEO) self-test.
  - Are any Diagnostic Trouble Codes (DTCs) present in the Powertrain Control Module (PCM)?
  1. Yes: REFER to DTC CHART: POWERTRAIN CONTROL MODULE (PCM) .
  2. No: GO to 4 on page 2.
CHECK FOR CORRECT Anti-Lock Brake System (ABS) MODULE OPERATION
1. Ignition OFF.
2. Disconnect and inspect the Anti-Lock Brake System (ABS) Module electrical connector.
3. Repair:
  - corrosion (install new connector or terminal - clean module pins)
  - damaged or bent pins - install new terminals/pins
  - pushed-out pins - install new pins as necessary
4. Connect the Anti-Lock Brake System (ABS) Module electrical connector. Make sure it seats and latches correctly.
5. Operate the system and determine if the concern is still present.
  - Is the concern still present?
  1. Yes: CHECK On-Line Automotive Service Information System (OASIS) for any applicable Technical Service Bulletins (TSBs). If a Technical Service Bulletin (TSB) exists for this concern, DISCONTINUE this test and FOLLOW the Technical Service Bulletin (TSB) instructions.
    If no Technical Service Bulletins (TSBs) address this concern and the vehicle is not equipped with adaptive cruise control, INSTALL a new Anti-Lock Brake System (ABS) module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE .
    
    If no Technical Service Bulletins (TSBs) address this concern and the vehicle is equipped with adaptive cruise control, INSTALL a new Anti-Lock Brake System (ABS) module and Hydraulic Control Unit (HCU). REFER to HYDRAULIC CONTROL UNIT (HCU) .
  2. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.