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P1612 CHAIN OF ECM-IMMU SEC-67 < DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM] C D E F G H I J L M A B SEC N O P P1612 CHAIN OF ECM-IMMU DTC Logic INFOID:0000000009705866 DTC DETECTION LOGIC NOTE: • If DTC P1612 is displayed with DTC U1000 (for BCM), first perform the trouble diagnosis for DTC U1000. . • If DTC P1612 is displayed with DTC U1010 (for BCM), first perform the trouble diagnosis for DTC U1010. . DTC CONFIRMATION PROCEDURE 1. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON. 2. Check DTC in Self Diagnostic Result mode of ENGINE using CONSULT. YES >> Go to NO >> Inspection End. Diagnosis Procedure INFOID:0000000009705867 1. REPLACE BCM 1. Replace BCM. Refer to BCS-70, "Removal and Installation" . 2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT. Refer to the CON- SULT Immobilizer mode and follow the on-screen instructions. Does the engine start? YES >> Inspection End. NO >> GO TO 2. 2. REPLACE ECM 1. Replace ECM. EC-465, "Removal and Installation" 2. Perform “ADDITIONAL SERVICE WHEN REPLACING ECM”. . >> Inspection End. DTC No. Trouble diagnosis name DTC detecting condition Possible cause P1612 CHAIN OF ECM-IMMU Inactive communication between ECM • Harness or connectors (The CAN communication line is open or • BCM |