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 (inserted into fuse block)
- Ignition relay (built into 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 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 B2553.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK DTC WITH IPDM E/R
Check "Self diagnostic result" with CONSULT-III. Refer to Testing and Inspection.
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.
2. Check continuity between BCM harness connector and IPDM E/R harness connector.





3. Check continuity between BCM harness connector and ground.





Is the inspection result normal?
YES - Replace IPDM E/R. Refer to Removal and Installation.
NO - Repair or replace harness or connector.
4.CHECK INTERMITTENT INCIDENT
Refer to Intermittent Incident.
- INSPECTION END