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PCS B2553 IGNITION RELAY PCS-49 < 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:0000000003657659 BCM turns ON the following relays to ignition power supply to each ECU when the ignition switch is turned DTC Logic INFOID:0000000003657660 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON under the following conditions (start the engine), and wait for at least 2 seconds. - Selector lever is in the P or N position. - Do not depress brake pedal. 2. Check “Self diagnostic result” with CONSULT-III. Is DTC detected? YES >> Go to NO >> INSPECTION END Diagnosis Procedure INFOID:0000000003657661 1. CHECK DTC WITH IPDM E/R Check “Self diagnostic result” with CONSULT-III. Refer to . Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace malfunctioning parts. 2. CHECK IGNITION RELAY FEEDBACK INPUT SIGNAL 1. Turn ignition switch OFF. 2. Disconnect BCM connector. 3. Check voltage between BCM harness connector and ground. Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 3. 3. CHECK IGNITION RELAY FEEDBACK CIRCUIT 1. Disconnect IPDM E/R connector. 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 feedback circuit is • IPDM E/R (+) (–) Condition Voltage (V) (Approx.) BCM Connector Terminal M123 123 Ground Ignition switch OFF 0 ON Battery voltage |