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SEC-24 < DTC/CIRCUIT DIAGNOSIS > B2193, P1612 CHAIN OF ECM-IMMU B2193, P1612 CHAIN OF ECM-IMMU Description INFOID:0000000009878881 BCM performs the ID verification with ECM that allows the engine to start. BCM starts the communication with ECM if ignition switch is turned ON and starts the engine if the ID is OK. ECM prevents the engine from start- ing if the ID is not registered. DTC Logic INFOID:0000000009878882 DTC DETECTION LOGIC NOTE: • If DTC B2193 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to . • If DTC B2193 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. 2. Check “Self diagnostic result” with CONSULT. YES >> Refer to . NO >> Inspection End. Diagnosis Procedure INFOID:0000000009878883 1. REPLACE BCM 1. Replace BCM. Refer to BCS-52, "Removal and Installation" . 2. Perform initialization with CONSULT. For initialization, refer to CONSULT Immobilizer mode and follow the on-screen instructions. Does the engine start? YES >> BCM was malfunctioning. NO >> ECM is malfunctioning. • Replace ECM. • Perform ECM re-communicating function. DTC No. Trouble diagnosis name DTC detecting condition Possible cause B2193 CHAIN OF BCM- Inactive communication between ECM and BCM • Harness or connectors (The CAN communication line is • BCM P1612 |