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Diagnosis Procedure

CHECK STARTER RELAY CONTROL SIGNAL

Turn ignition switch ON.

Check voltage between IPDM E/R harness connector and ground.

(+)		(-)	Condition	Voltage
IPDM E/R
Connector	Terminal
E46	44	Ground	At engine cranking	0 - 1 V
			Other than engine cranking	Battery voltage

Is the inspection result normal?

YES

GO TO 4.

NO

GO TO 2.

CHECK STARTER RELAY CONTROL SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect IPDM E/R connector.
Disconnect ECM connector.

Check continuity between IPDM E/R harness connector and ECM harness connector.

IPDM E/R		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
E46	44	E16	105	Yes

Check continuity between IPDM E/R harness connector and ground.

IPDM E/R		Ground	Continuity
Connector	Terminal
E46	44		No

Is the inspection result normal?

YES

GO TO 3.

NO

Repair or replace harness.

REPLACE ECM
Replace ECM.

Refer to Removal and Installation .

Inspection End.
PERFORM DTC CONFIRMATION PROCEDURE AGAIN
1. Turn ignition switch ON.
2. Select "Self diagnostic result" mode of "IPDM E/R" using CONSULT.
3. Touch "ERASE".
4. Perform DTC CONFIRMATION PROCEDURE for DTC B210D. Refer to DTC Logic .
Is DTC detected?

YES

Replace IPDM E/R. Refer to Removal and Installation .

NO

Inspection End.