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Home >> Mazda >> 1986 >> 626 Base >> Repair and Diagnosis >> Engine Performance >> System >> EFI Control System >> Testing >> Diagnostic Procedure >> Code 22 (No. 1 Cylinder Sensor - 626 Turbo)

Code 22 (No. 1 Cylinder Sensor - 626 Turbo)

  1. Check for poor connections at No. 1 cylinder sensor connector. Repair or replace as necessary. If connections are okay, measure voltage at terminal "N" of ECU. If voltage is incorrect, replace faulty ECU.
  2. If reading is correct, measure voltage at terminal "D" of distributor connector. If voltage is correct, replace faulty ECU. If reading is incorrect, check for open or short circuit in wiring harness from terminal "D" of distributor to terminal "N" of ECU connector. If wiring is okay, replace faulty ECU.
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