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Home › Infiniti › 2002 › I35 › Repair and Diagnosis › Brakes › Traction Control › Anti-Lock/Traction Control › Diagnostic Tests › Diagnostic Procedure No. 3 › Control Unit

Control Unit

  1. Turn ignition off. Disconnect ABS/TCS control unit. See Figure . Check terminals for damage or loose connections. Repair as necessary. Reconnect harness connector. Perform self-diagnostics again. See SELF-DIAGNOSTIC SYSTEM  . Check ABS warning light. If ABS warning light stays on, go to next step. If ABS warning light does not stay on, system is okay.
  2. Check ABS/TCS control unit power supply circuit. See  2 . If battery voltage is present, go to next step. If battery voltage is not present, repair as necessary.
  3. Perform self diagnostics. See SELF-DIAGNOSTIC SYSTEM  . If screen indicated CONTROLLER FAILURE, replace ABS/TCS control unit. If any DTC's were listed, perform appropriate test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  .
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