Checking With '83 System Checker

Warm up the engine and run it at idle speed.
Connect the system checker (49 G030 920 ) to the service connector.
If troubled, it is indicated as shown in Fig 1

NOTE: For Code Number 3 in Fig 1 below, if the trouble have been found, do not turn off the ignition switch. If it is turned off, O2 sensor cannot be checked with the system checker.

Fig 1: Trouble Code Identification Chart

NOTE: It they are troubled more than two items at the same time, the indicator lamp lights on in the numerical order of the Code No.

Fig 2: O2 Signal Indication Pattern