Testing - System Checker 83: Description
System Checker 83 (49 G040 920 ), can be used to detect problems in each sensor and damaged wiring or poor contact or short circuits between sensor control units. The checker connects to the control unit check terminal. A Green lamp is used to test the Oxygen (O2) sensor. A Red lamp and buzzer is used to indicate trouble in the system. Specific patterns for each sensor are shown in Fig 1 .