E.C.C. TROUBLE DIAGNOSES (Models with catalyzer and E.G.R.) — Diagnostic Procedure 1: MAIN POWER SUPPLY AND GROUND CIRCUIT (Not self-diagnostic item)

Distinguishes B13 models (B) from N14 models (N). E.C.C. relay location differs between B13 and N14. Applies to GA13DS, GA14DS & GA16DS models with catalyzer and E.G.R.