B2553

B2553 IGNITION RELAY





Description
BCM turns ON the following relays to ignition power supply to each ECU when the ignition switch is turned ON.
- Ignition relay
- Ignition relay (inside IPDM E/R)
- Blower relay
BCM checks any ignition relay ON request for consistency with the actual ignition relay operation status.




DTC Logic

DTC DETECTION LOGIC






DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON under the following conditions, and wait for 2 seconds or more.
- Selector lever is in the P or N position
- Do not depress brake pedal
2. Check "Self-diagnosis result" with CONSULT-III.
Is DTC detected?
YES - Go to B2553.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK FUSE
Check that the following fuse is not blown.





Is the fuse fusing?
YES - Replace the blown fuse after repairing the affected circuit if a fuse is blown.
NO - GO TO 2.
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 - Replace BCM. Removal And Installation.
NO - GO TO 3.
3.CHECK IGNITION RELAY FEEDBACK CIRCUIT
1. Disconnect ignition relay connector.
2. Check continuity between BCM harness connector and ignition relay harness connector.





3. Check continuity between BCM harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair or replace harness.
4.CHECK IGNITION RELAY
B2553.
Is the inspection result normal?
YES - GO TO 5.
NO - Replace ignition relay.
5.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END




Component Inspection
1.CHECK IGNITION RELAY
1. Turn ignition switch OFF.
2. Remove ignition relay.





3. Check the continuity between ignition relay terminals.





Is the inspection result normal?
YES - INSPECTION END
NO - Replace ignition relay.