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PCS-60 < COMPONENT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM] B2553 IGNITION RELAY B2553 IGNITION RELAY Description INFOID:0000000004202440 BCM turns ON the following relays to ignition power supply to each ECU when the ignition switch is turned ON. • Ignition relay-1 (inside IPDM E/R) • Ignition relay-2 (inside fuse block) • Blower fan motor relay BCM checks any ignition relay ON request for consistency with the actual ignition relay operation status. DTC Logic INFOID:0000000004202441 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON under the following conditions, and wait for at least 2 seconds. - CVT selector lever is in the P or N position. - Release brake pedal. 2. Check “Self diagnostic result” with CONSULT-III. YES >> Go to NO >> Inspection End. Diagnosis Procedure INFOID:0000000004202442 1. CHECK IGNITION RELAY FEEDBACK INPUT SIGNAL Check voltage between BCM harness connector and ground under the following conditions. Is the inspection result normal? YES >> Replace BCM. Refer to BCS-96, "Removal and Installation" NO >> GO TO 2 2. CHECK IGNITION RELAY FEEDBACK CIRCUIT DTC No. Trouble diagnosis name DTC detecting condition Possible cause B2553 IGNITION RELAY BCM detects a difference of signal for 2 seconds or • Harness or connectors (ignition relay-2 feedback circuit is Terminals Condition Voltage (V) (+) (-) BCM Ground Connector Terminal M18 31 Ignition switch OFF 0 ON Battery voltage ALMIA0086ZZ |