Infiniti EX35. Manual - part 1137

 

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Infiniti EX35. Manual - part 1137

 

 

PCS

B2553 IGNITION RELAY

PCS-49

< COMPONENT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

B2553 IGNITION RELAY

Description

INFOID:0000000003657659

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

INFOID:0000000003657660

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 

PCS-49, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003657661

1.

CHECK DTC WITH IPDM E/R

Check “Self diagnostic result” with CONSULT-III. Refer to 

PCS-123, "DTC Index"

.

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.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2553

IGNITION RELAY

BCM detects a difference of signal for 2 seconds or 
more between the following information. 
• Ignition relay (fuse block) ON/OFF operation
• Ignition relay (fuse block) feedback.

• Harness or connectors

(ignition relay feedback circuit is 
open or short)

• IPDM  E/R

(+)

(–)

Condition

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M123

123

Ground

Ignition switch

OFF

0

ON

Battery voltage

PCS-50

< COMPONENT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B2553 IGNITION RELAY

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 

PCS-34, "Removal and Installation"

.

NO

>> Repair or replace harness or connector.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

BCM

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

M123

123

E5

19

Existed

BCM

Ground

Continuity

Connector

Terminal

M123

123

Not existed

PCS

B260A IGNITION RELAY

PCS-51

< COMPONENT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

B260A IGNITION RELAY

Description

INFOID:0000000003657662

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 fan motor relay
BCM checks any ignition relay ON request for consistency with the actual ignition relay operation status.

DTC Logic

INFOID:0000000003657663

DTC DETECTION LOGIC

NOTE:
• If DTC B260A is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

PCS-47, "DTC Logic"

.

• If DTC B260A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

PCS-48, "DTC Logic"

.

• If DTC B260A is displayed with DTC B261A, first perform the trouble diagnosis for DTC B261A. Refer to

PCS-62, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON under the following conditions, 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 

PCS-51, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003657664

1.

CHECK DTC WITH IPDM E/R

Check “Self diagnostic result” with CONSULT-III. Refer to 

PCS-123, "DTC Index"

.

Is DTC detected?

YES

>> Repair or replace the malfunctioning parts.

NO

>> GO TO 2.

2.

CHECK IGNITION RELAY 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?

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B260A

IGNITION RELAY

BCM detects a difference of signal for 2 second or 
more between the following information.
• Ignition relay (IPDM E/R) operation request
• Ignition relay feedback from IPDM E/R (CAN).

• Harness or connectors

(Ignition relay operation circuit is 
open or shorted.)

• IPDM  E/R

(+)

(–)

Voltage (V)

(Approx.)

BCM

Connector

Terminal

M121

47

Ground

Battery voltage

PCS-52

< COMPONENT DIAGNOSIS >

[POWER DISTRIBUTION SYSTEM]

B260A IGNITION RELAY

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK IGNITION RELAY (IPDM E/R) CIRCUIT

1.

Disconnect IPDM E/R connector.

2.

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

3.

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

Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to 

PCS-34, "Removal and Installation"

.

NO

>> Repair or replace harness or connector.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

IPDM E/R

BCM

Continuity

Connector

Terminal

Connector

Terminal

E5

27

M121

47

Existed

IPDM E/R

Ground

Continuity

Connector

Terminal

E5

27

Not existed

 

 

 

 

 

 

 

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