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 CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON under the following conditions, and wait for 2 seconds or more.

A/T models
- Selector lever is in the P or N position
- Do not depress brake pedal

M/T models
- Do not depress clutch pedal
2. Check "Self-diagnostic result" with CONSULT-III.
Is DTC detected?
YES - Go to SEE Diagnosis Procedure.
NO - INSPECTION END




Diagnosis Procedure
1.CHECK DTC WITH IPDM E/R
Check "Self-diagnostic result" with CONSULT-III. Testing and Inspection.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace the 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 - Replace BCM. Removal And Installation.
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. Service and Repair.
NO - Repair or replace harness.