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P1612 CHAIN OF ECM-IMMU SEC-41 < COMPONENT DIAGNOSIS > [INTELLIGENT KEY SYSTEM] C D E F G H I J L M A B SEC N O P P1612 CHAIN OF ECM-IMMU Description INFOID:0000000001699936 BCM performs the ID verification with ECM that allows the engine to start. Start the engine if the ID is OK. DTC Logic INFOID:0000000001699937 DTC DETECTION LOGIC NOTE: • If DTC P1612 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to DTC CONFIRMATION PROCEDURE 1. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON under the following conditions. A/T models - A/T selector lever is in the P or N position - Do not depress brake pedal M/T models - Do not depress clutch pedal 2. Check “Self diagnostic result” with CONSULT-III. Is DTC detected? YES >> Go to NO >> INSPECTION END Diagnosis Procedure INFOID:0000000001699938 1. REPLACE BCM 1. Replace BCM. Refer to BCS-79, "Removal and Installation" . 2. Perform initialization with CONSULT-III. Does the engine start? YES >> INSPECTION END NO >> GO TO 2. 2. REPLACE ECM 1. Replace ECM. 2. EC-16, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (ECM) : Description" >> INSPECTION END DTC No. Trouble diagnosis name DTC detecting condition Possible cause P1612 CHAIN OF ECM- Inactive communication between ECM and BCM • Harness or connectors (The CAN communication line is • BCM |