Troubleshooting W/System Checker 83: Notes
System Checker 83 (49 G030 920 ) can be used to detect (via the control unit check terminal) and indicate any problems of each sensor and damaged wiring or poor contact or short circuit between each of the sensor-control units.
Trouble is indicated by a red lamp and a buzzer. The indication for problems of each sensor are shown in Fig 1 below.
NOTE:
If there is trouble in 2 or more places, the indication will be for the smaller code number first. Even if the problem is corrected during indication, 1 cycle will be indicated. If, after a malfunction has occurred the IG key is switched OFF, the malfunction indicator for the O2 sensor will not be displayed on the checker.
The control unit has a built-in fail-safe mechanism. If a malfunction occurs during driving, the control unit will on its own initiative send out a command, and driving performance will not be affected.