240 L4-2127cc 2.1L SOHC B21F (1982)
Fig. 75 CHECK LAMBDA SOND FUNCTION
If neither CO content nor meter reading changes:
-Disconnect Lambda sond and ground the wire. CO content and dwell angle should increase. Fig. 75.
-Wiring and control unit are O.K. if meter reading increases.
-Replace and re-test with new Lambda sond.
- If meter reading does not change, either control unit or wiring to control unit is defective. Check wiring to control unit, if O.K. replace control unit.
C.O. content and dwell meter reading increase:
-This indicates a defective Lambda-sond (internal short). Replace and re-test with new Lambda sond.