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PCS B2553 IGNITION RELAY PCS-53 < COMPONENT DIAGNOSIS > [POWER DISTRIBUTION SYSTEM] C D E F G H I J K L B A O P N B2553 IGNITION RELAY Description INFOID:0000000004219142 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 (J/B)] • Blower relay BCM checks any ignition relay ON request for consistency with the actual ignition relay operation status. DTC Logic INFOID:0000000004219143 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-DIAG RESULTS” with CONSULT-III. YES >> Refer to NO >> Inspection End. Diagnosis Procedure INFOID:0000000004219144 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-87, "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 volt- age ALMIA0086ZZ |