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DTC C0165: Abs/TCS Brake Switch Circuit Open

  1. Turn ignition on, with engine off. Using scan tool, monitor brake switch status while cycling switch. If scan tool indicates correct brake status, problem is intermittent. If scan tool does not indicate correct brake status, go to next step.
  2. Check BRAKE fuse (15-amp) located in underhood fuse block. Replace as necessary and retest. If fuse is okay, disconnect brake switch. Connect and reconnect jumper wire between switch harness connector terminals while monitoring scan tool. If scan tool indicates a change in status, check for terminal tightness. Repair as necessary. If terminals are okay, replace brake switch. If scan tool does not indicate a change in status, go to next step.
  3. Check voltage on brake switch circuit to fuse block. If ignition voltage is present, check for open in circuit to EBTCM or terminal tightness at EBTCM. Repair as necessary. If ignition voltage is not present, repair open in circuit to fuse block.
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