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.
-Selector lever is in the P or N position
-Do not depress brake pedal
-Do not depress clutch pedal
2.Check "Self-diagnostic result" with CONSULT.
Is DTC detected?
YES- Go to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK DTC WITH IPDM E/R

Check "Self-diagnostic result" with CONSULT. Refer to "DTC Index" 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. Refer to "Removal and Installation" 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. Refer to "Removal and Installation" Removal and Installation.
NO- Repair or replace harness.