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18 CHECK TARGET IDLE SPEED AGAIN With CONSULT-II 1. Start engine and warm it up to normal operating temperature. 700±50 rpm Without CONSULT-II 1. Start engine and warm it up to normal operating temperature. 700±50 rpm OK or NG OK © GO TO 20. NG © GO TO 19. 19 CHECK ECM FUNCTION 1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but this is rarely the case.) 2. Perform initialization of NATS system and registration of NATS ignition key IDs. Refer to “NATS (Nissan Anti-Theft System)”, EC-QG-45. © GO TO 14. 20 CHECK IGNITION TIMING 1. Start engine and warm it up to normal operating temperature. SEM872F Ignition timing: 8°±5° BTDC OK © GO TO 28. NG © GO TO 21. 21 CHECK TIMING CHAIN INSTALLATION Check timing chain installation. Refer to EM section. OK or NG OK © GO TO 19. NG © 1. Repair the timing chain installation. TROUBLE DIAGNOSIS — BASIC INSPECTION QG16 I 18DE Basic Inspection (Cont’d) EC-77 |