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Fault Code 36521: Pressure Switch In TC Block Signal Short To Ground

  1. Turn ignition on and wait for pump to build up pressure in accumulator. After system has pressurized, turn ignition off and disconnect TC/ABS ECU connector. Connect breakout box to TC/ABS ECU connector. Ensure continuity is present between breakout box pins No. 13 and 26 when brake pedal is raised. Ensure no continuity is present between breakout box pins No. 13 and 26 when brake pedal is depressed.
  2. If continuity is not as specified, check Brown/White wire between TC/ABS ECU connector terminal No. 13 and TC block connector terminal No. 2. Also check Black/White wire between TC/ABS ECU terminal No. 26 and TC block connector terminal No. 3. If pressure switch on TC block is defective, install new hydraulic unit. Perform brake light switch test. See FAULT CODES 3/25321  : BRAKE LIGHT SWITCH SIGNAL ABSENT OR SHORTING TO GROUND. If no problems are found, replace TC/ABS ECU.
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